ILLINOIS

                                              MONTHLY AVERAGE TEMPERATURES (F)

                          |  PERIOD   |
                          | OF RECORD |   JAN   FEB   MAR   APR   MAY   JUN   JUL   AUG   SEP   OCT   NOV   DEC    YEAR

ALBION                    | 1948-2006 |  31.1  35.9  45.4  57.1  66.5  75.3  78.7  77.2  70.5  59.1  46.4  35.3    56.5
ALEDO                     | 1901-2010 |  22.8  26.6  38.2  50.9  61.6  70.8  75.0  72.9  65.3  54.0  39.9  27.1    50.4
ALTON DAM 26              | 1948-2010 |  28.8  33.1  42.8  55.0  65.3  74.5  78.6  76.9  69.3  57.5  44.9  33.6    55.0
ANNA 1 E                  | 1901-2010 |  34.0  37.5  47.0  57.4  66.2  74.8  78.5  77.1  70.4  59.5  47.3  36.9    57.2
ANTIOCH                   | 1948-2008 |  20.5  24.2  34.0  46.7  57.4  67.2  71.8  70.5  62.9  51.7  38.2  25.8    47.6
ATHENS 2 SW               | 2000-2010 |  26.8  29.3  41.4  54.3  62.5  71.1  74.0  73.8  66.2  54.2  43.3  29.5    52.2
AURORA COLLEGE            | 1901-2010 |  22.2  25.6  36.7  48.7  59.4  68.9  73.3  71.5  64.1  52.4  39.1  26.4    49.0
BARRINGTON                | 1962-2010 |  19.9  23.5  35.3  48.2  58.0  67.7  72.1  70.4  62.8  51.1  38.7  24.9    47.7
BELLEVILLE SIU RESEARCH   | 1948-2010 |  31.3  36.0  45.3  56.6  65.8  74.5  78.0  76.0  68.9  58.1  46.0  35.3    56.0
BENTLEY                   | 1948-2010 |  24.6  30.4  40.7  52.7  62.7  72.2  76.0  74.6  66.7  54.7  42.6  29.5    52.3
BENTON FOREST SERVICE     | 1948-2009 |  32.7  36.3  45.5  56.5  65.0  73.9  78.4  77.1  69.0  56.9  46.5  34.4    56.0
BLOOMINGTON 5 W           | 1999-2010 |  25.0  27.9  40.4  53.2  62.2  71.6  74.3  73.4  66.6  53.9  42.4  27.8    51.6
NORMAL                    | 1901-1977 |  25.9  29.3  40.0  52.0  62.8  72.1  76.2  74.2  67.2  56.0  41.7  29.7    52.3
BROOKPORT DAM 52          | 1948-2010 |  34.0  37.9  47.6  58.4  67.0  75.1  78.8  77.4  70.3  59.1  48.3  37.7    57.6
BROWNSTOWN 4 SW           | 1992-2009 |  29.1  33.6  42.8  54.4  64.5  73.2  76.4  75.1  66.8  55.8  44.2  33.1    54.1
CAHOKIA                   | 1969-2010 |  30.4  34.6  45.2  56.3  65.2  74.1  78.1  76.4  68.8  57.4  45.7  34.5    55.6
CAIRO 3 N                 | 1948-2010 |  34.7  39.1  48.1  59.4  68.7  76.9  80.2  78.5  71.4  60.4  48.3  38.4    58.7
CARBONDALE SEWAGE PLANT   | 1910-2010 |  33.2  36.9  46.0  57.0  66.0  74.7  78.5  76.8  69.8  58.3  46.4  36.5    56.7
CARLINVILLE               | 1901-2010 |  28.7  32.6  43.0  54.3  64.0  73.1  77.1  75.4  68.2  57.0  43.9  32.6    54.2
CARLYLE RESERVOIR         | 1962-2010 |  27.6  31.9  43.1  54.9  64.5  73.5  77.3  75.7  68.1  56.5  44.9  32.9    54.2
CARMI 3                   | 1987-2010 |  33.4  36.5  45.8  56.7  65.5  74.4  77.5  76.4  68.8  56.9  46.4  35.1    56.1
CASEY                     | 1948-2010 |  27.0  31.6  42.2  52.5  62.9  73.0  76.3  74.6  66.8  54.6  43.6  30.5    53.0
CHAMPAIGN 9 SW (CRN)      | 2002-2010 |  24.7  26.6  41.7  52.7  61.9  70.5  72.0  70.9  65.5  52.8  42.4  27.6    50.8
CHANNAHON DRESDEN ISLAN   | 1948-2010 |  24.7  28.1  38.1  50.6  59.8  69.8  73.7  72.1  66.1  53.2  42.0  28.4    50.6
CHARLESTON                | 1901-2010 |  28.5  31.9  42.5  53.8  63.9  72.8  76.7  74.8  68.1  56.6  43.5  32.1    53.8
CHENOA                    | 1948-2010 |  23.8  28.6  39.2  52.0  62.3  71.7  74.4  72.7  66.1  54.3  41.0  28.8    51.2
CHICAGO BOTANICAL GARDE   | 1981-2010 |  24.0  27.4  36.8  47.3  57.4  67.4  72.9  71.8  64.2  52.5  40.7  28.2    49.2
CHICAGO O'HARE WSO ARPT   | 1958-2010 |  22.2  26.5  37.0  48.8  59.1  68.7  73.5  72.2  64.6  52.8  40.1  27.5    49.4
CHICAGO UNIVERSITY        | 1948-1994 |  25.0  29.1  38.0  49.5  60.0  69.8  74.8  73.6  66.7  55.7  42.0  30.0    51.2
CHICAGO MIDWAY AP 3 SW    | 1928-2010 |  24.3  27.9  37.8  49.6  60.3  70.4  75.4  73.8  66.3  54.7  40.8  28.9    50.8
CHICAGO WB CITY           | 1948-1965 |  26.6  29.7  36.8  49.1  60.2  70.1  75.0  74.3  67.1  57.1  42.1  30.2    51.5
CICERO                    | 1948-1959 |  26.7  30.2  37.2  50.1  61.7  71.1  75.8  73.8  66.0  56.4  41.1  29.8    51.7
COBDEN 2 S                | 1951-1976 |  32.9  37.3  45.4  57.5  65.7  73.9  76.8  75.5  69.1  58.6  46.3  36.6    56.3
COMPTON 1 NW              | 1991-2004 |  20.3  26.2  35.6  47.5  58.9  68.4  72.0  70.4  62.3  51.1  37.2  26.7    48.1
CONGERVILLE 2 NW          | 1990-2010 |  24.3  29.1  39.5  52.0  61.2  70.4  74.0  72.4  65.8  53.4  42.0  28.4    51.0
DANVILLE                  | 1901-2010 |  27.1  30.7  41.0  52.7  62.8  71.9  75.5  73.6  66.9  55.3  42.5  31.1    52.6
DECATUR                   | 1901-2010 |  27.4  31.1  41.7  53.4  63.7  72.8  76.7  74.9  68.1  56.4  43.0  31.4    53.4
DE KALB                   | 1966-2010 |  19.6  24.7  36.2  48.8  59.6  69.7  73.4  71.3  64.1  51.8  38.5  25.8    48.6
DIXON 1 NW                | 1901-2009 |  21.2  24.9  36.4  49.3  60.3  69.6  73.9  71.9  64.3  52.6  38.8  25.9    49.1
DIXON SPRINGS AGR CENTE   | 1967-2010 |  33.8  38.5  48.1  58.5  66.3  74.4  78.1  77.0  70.4  59.4  48.3  38.1    57.6
DU QUOIN 2 S              | 1901-2010 |  32.7  36.4  46.0  56.7  66.1  74.7  78.5  76.8  69.8  58.6  46.2  35.8    56.5
DWIGHT                    | 1990-2010 |  22.4  27.2  37.4  49.7  60.8  70.2  72.9  71.0  63.9  52.0  39.7  27.4    49.5
EAST ST LOUIS PARKS CO    | 1948-1968 |  31.8  36.3  44.7  57.1  67.3  76.5  79.0  78.2  70.5  59.3  45.9  35.6    56.8
EFFINGHAM                 | 1901-2010 |  28.8  31.9  42.2  53.9  63.5  73.0  77.0  75.0  67.9  56.3  43.7  32.5    53.8
ELGIN                     | 1948-2010 |  20.0  24.6  35.5  47.7  58.5  68.3  72.9  71.2  63.4  50.6  38.6  25.1    48.0
ELIZABETH 5 S             | 1984-2010 |  19.4  23.7  35.6  47.8  57.9  67.8  71.3  69.1  61.2  49.2  36.9  23.4    46.9
ELIZABETHTOWN 1 NW        | 1948-1968 |  35.3  39.2  46.5  57.8  66.7  74.5  77.8  76.2  69.7  59.6  46.4  37.3    57.3
FAIRFIELD RADIO WFIW      | 1901-2010 |  31.8  35.1  45.1  55.9  65.2  74.0  77.8  76.3  69.5  57.9  45.5  34.9    55.7
FARMER CITY               | 1948-2010 |  23.9  28.5  39.7  51.8  62.6  71.8  74.8  72.5  66.2  54.5  41.2  29.7    51.4
FLORA                     | 2000-2010 |  30.3  32.7  43.8  56.2  65.0  74.4  76.6  76.2  68.5  56.3  45.4  32.2    54.8
FLORA 5 NW                | 1901-2009 |  31.3  34.4  44.8  55.4  64.8  73.7  77.5  75.7  68.9  57.6  45.1  34.3    55.3
FREEPORT                  | 1909-1973 |  19.6  23.7  34.5  48.2  59.1  68.7  73.0  70.7  63.0  51.9  37.4  24.8    47.9
FREEPORT WASTE WTR PLT    | 1948-2010 |  18.7  23.2  35.0  47.9  59.1  68.7  72.7  70.3  62.2  50.1  37.5  23.9    47.4
FULTON LOCK & DAM #13     | 1948-2010 |  20.5  24.7  35.6  49.5  60.8  70.2  74.1  72.4  64.5  53.3  39.3  25.9    49.2
GALESBURG                 | 1948-2010 |  22.2  27.1  37.9  51.1  62.0  71.3  75.0  73.0  65.3  53.9  39.9  27.4    50.5
GALVA                     | 1901-2010 |  22.2  26.0  37.4  50.0  61.2  70.6  74.8  72.7  65.2  53.6  39.6  26.8    50.0
GEBHARD WOODS STATE PAR   | 1970-1995 |  20.4  25.5  38.0  49.9  61.1  70.7  74.4  71.8  63.8  52.0  40.0  27.1    49.6
GENESEO                   | 1948-2010 |  21.1  26.1  37.7  51.0  62.1  71.5  75.0  73.0  65.1  53.4  39.7  26.6    50.2
GIBSON CITY 1 E           | 1948-2008 |  24.4  28.0  38.6  50.1  61.5  70.8  73.8  71.9  64.8  52.4  40.5  28.1    50.4
GLADSTONE DAM 18          | 1948-2010 |  22.6  28.2  38.7  51.9  62.3  71.8  75.2  73.8  66.0  54.2  41.2  28.3    51.2
GOLCONDA 1 SE             | 1948-1980 |  33.7  38.3  44.6  56.2  66.0  74.7  78.4  77.2  69.8  58.4  44.2  36.5    56.5
GOLDEN                    | 1948-2008 |  24.4  28.6  40.7  52.7  62.9  72.2  76.0  73.7  66.4  55.3  41.8  29.3    52.0
GRAND CHAIN DAM 53        | 1948-2010 |  34.4  38.0  46.3  57.3  66.2  74.1  78.0  78.0  71.3  59.0  47.9  36.9    57.3
 UNKNOWN                  | 2000-2010 |  32.5  33.0  45.6  58.0  65.3  75.1  77.3  77.4  70.2  57.2  47.5  34.2    56.1
GREENVILLE 1 E            | 1901-2010 |  31.1  33.6  44.1  54.8  64.8  73.6  78.3  76.4  69.5  58.1  44.4  33.9    55.2
GRIGGSVILLE               | 1901-2010 |  27.3  30.7  41.9  53.8  64.0  73.0  77.3  75.2  68.0  56.8  43.3  31.3    53.5
HARRISBURG                | 1901-2010 |  34.0  37.4  47.3  57.8  66.9  75.4  79.1  77.7  70.8  59.1  47.4  37.4    57.5
HAVANA                    | 1901-1966 |  26.6  30.0  40.8  52.9  63.7  73.0  77.2  75.2  67.8  56.1  41.9  30.2    53.0
HAVANA 4 NNE              | 1948-2010 |  24.3  29.1  40.4  52.9  62.7  72.4  76.4  74.0  66.4  54.4  41.5  29.4    52.0
HENNEPIN POWER PLANT      | 1962-2009 |  21.8  26.3  38.2  50.7  61.2  70.5  74.1  72.2  65.0  53.0  40.0  27.2    50.0
HILLSBORO 2 SSW           | 1901-2010 |  29.7  33.3  43.8  54.9  64.6  73.5  77.5  75.7  68.7  57.5  44.5  33.1    54.7
HOOPESTON                 | 1902-2010 |  26.0  29.4  39.9  51.6  62.2  71.5  75.1  73.1  66.4  54.7  41.7  29.8    51.8
ILLINOIS CITY DAM 16      | 1948-2010 |  22.1  24.5  39.3  52.5  62.0  71.9  73.5  73.2  66.6  52.9  42.2  24.9    50.5
IUKA 7 SW                 | 1997-2010 |  30.3  33.7  43.4  55.5  64.2  72.8  76.2  75.7  68.4  56.5  45.9  33.0    54.6
JACKSONVILLE 2 E          | 1901-2010 |  26.9  30.5  41.2  52.9  63.0  72.1  76.0  74.1  67.0  55.7  42.7  30.9    52.8
JERSEYVILLE 2 SW          | 1948-2010 |  27.9  32.5  42.3  54.3  64.0  72.9  76.6  74.6  67.4  56.0  43.6  32.3    53.7
JOLIET BRANDON RD DAM     | 1948-2010 |  22.3  26.9  37.9  49.9  60.1  70.1  74.0  72.3  65.1  52.7  40.7  27.6    50.0
JOLIET                    | 1901-1974 |  23.8  28.0  36.9  51.0  61.1  71.2  74.6  73.0  66.0  55.9  41.0  28.7    50.9
KANKAKEE 3 SW             | 1917-1973 |  24.8  28.5  38.3  50.2  60.9  70.8  74.6  72.6  66.0  54.8  40.5  28.9    50.9
KANKAKEE 4 NW             | 1948-1960 |  26.0  28.9  37.1  50.0  61.2  70.6  73.9  71.9  64.6  54.6  39.2  29.2    50.6
KANKAKEE SEWAGE PLANT     | 1948-2010 |  22.8  26.9  38.1  49.9  60.8  70.6  74.5  72.4  65.1  52.8  41.0  28.1    50.3
KASKASKIA R NAV LOCK      | 1974-2010 |  30.9  35.0  45.2  56.4  66.3  75.0  79.2  77.3  69.2  57.4  46.2  34.4    56.0
KEWANEE                   | 1948-2010 |  21.4  25.8  36.7  50.0  61.0  70.4  73.9  71.9  64.2  52.8  39.2  26.7    49.5
LACON 1 N                 | 1950-2009 |  24.0  28.5  39.6  52.7  62.7  71.8  75.3  73.7  66.5  54.6  41.5  29.4    51.7
LA HARPE 1 SW             | 1901-2010 |  24.4  28.2  39.5  51.7  62.3  71.4  75.6  73.6  66.1  54.7  40.9  28.6    51.4
LAKE VILLA 2 NE           | 1985-2005 |  22.4  26.6  35.6  47.1  57.8  68.0  72.5  71.0  63.4  51.0  38.9  26.9    48.4
LA SALLE PERU             | 1948-1963 |  24.2  28.9  37.1  51.4  63.0  72.5  76.0  74.7  66.5  55.5  40.4  29.0    51.6
LAWRENCEVILLE             | 1967-2010 |  30.8  34.6  44.1  54.4  65.0  74.2  77.2  75.7  68.7  57.2  45.6  34.3    55.2
LINCOLN                   | 1906-2010 |  26.1  30.1  40.4  52.6  63.1  72.3  76.0  73.8  66.9  55.1  42.0  30.4    52.4
MAKANDA 1 NW              | 1951-1976 |  33.4  37.8  45.6  58.1  66.3  74.7  77.7  76.4  70.0  60.1  47.0  37.0    57.0
MARENGO                   | 1901-2010 |  20.3  23.4  34.8  47.4  58.4  68.3  72.9  70.9  63.3  51.7  37.9  25.0    47.9
MARION 4 NNE              | 1948-1998 |  29.3  33.8  44.0  54.6  63.8  72.4  76.7  74.8  67.6  56.0  44.8  34.3    54.3
MARSEILLES LOCK           | 1948-2010 |  22.4  26.9  37.8  50.4  60.5  69.0  72.8  71.3  65.0  52.4  40.4  26.5    49.6
MARSHALL                  | 1948-2004 |  27.8  31.8  42.2  54.1  63.7  72.2  75.3  73.2  67.0  56.6  44.1  32.7    53.4
MASON CITY 1 W            | 1948-2010 |  24.1  29.4  41.1  53.4  63.5  72.5  75.6  73.4  66.5  55.2  42.1  29.2    52.2
MATTOON                   | 1948-2010 |  26.5  31.2  40.5  52.7  63.4  72.5  76.0  74.0  67.0  55.5  42.2  30.9    52.7
MCHENRY LOCK & DAM        | 1948-2010 |  20.6  24.6  35.1  47.6  57.4  67.7  71.8  70.2  62.4  50.7  38.5  25.7    47.7
MC LEANSBORO 2 E          | 1901-2002 |  32.2  35.7  45.3  55.9  65.5  74.3  78.3  76.6  69.8  58.4  45.9  35.5    56.1
MINONK                    | 1901-2010 |  23.4  27.1  38.4  50.5  61.4  70.9  74.8  72.8  65.8  54.2  40.3  27.7    50.6
MOLINE WSO AP             | 1948-2010 |  21.3  26.2  37.4  50.7  61.5  71.2  75.0  73.0  64.8  53.3  39.5  26.6    50.1
MONMOUTH                  | 1901-2010 |  23.7  27.8  39.2  51.7  62.2  71.3  75.4  73.5  66.0  54.6  40.5  28.1    51.2
MONMOUTH 4 NW             | 1995-2010 |  22.3  26.9  37.4  50.4  61.0  70.5  73.8  72.9  64.7  52.9  40.1  27.0    50.0
MORRIS 5 N                | 1948-2010 |  23.1  27.4  37.0  50.4  61.0  70.7  73.9  72.1  65.5  54.1  40.4  27.9    50.3
MORRISON                  | 1901-2010 |  21.4  25.3  37.0  49.8  60.8  70.0  74.2  72.1  64.5  53.0  39.1  26.2    49.4
MORRISONVILLE             | 1948-2010 |  26.2  30.3  40.9  52.8  63.2  72.3  75.5  74.0  66.9  54.6  42.7  30.4    52.5
MORRISONVILLE 4 SE        | 1901-1971 |  28.5  31.5  41.7  53.0  63.0  72.3  76.4  74.4  67.8  56.6  42.8  31.7    53.3
MOUNT CARMEL              | 1948-2010 |  31.1  34.2  44.1  55.4  65.4  74.5  77.8  76.1  68.8  57.0  45.8  34.5    55.4
MOUNT CARMEL 3 N          | 1902-1977 |  32.4  34.9  45.6  56.2  65.7  74.5  78.2  76.5  69.8  58.4  45.7  35.2    56.1
MOUNT CARROLL             | 1901-2010 |  20.1  23.9  35.6  48.4  59.3  68.6  72.6  70.7  62.9  51.3  37.8  24.8    48.0
MT VERNON 3 NE            | 1901-2010 |  31.1  34.4  44.4  55.5  65.0  73.9  77.8  76.3  69.3  57.7  45.2  34.3    55.4
MOWEAQUA                  | 1963-2010 |  25.9  30.7  41.4  53.3  63.5  72.4  75.9  73.5  67.0  55.6  42.8  31.3    52.8
MUNDELEIN 4 WSW           | 1999-2010 |  22.5  24.7  35.9  48.4  57.6  67.8  72.3  71.3  64.0  51.5  40.3  25.5    48.5
NASHVILLE 4 NE            | 1948-2010 |  30.0  34.6  45.2  56.2  65.4  74.3  77.6  75.8  68.9  58.0  45.9  34.7    55.6
NEW BOSTON DAM 17         | 1948-2010 |  23.7  28.1  39.5  53.0  62.3  71.8  75.7  73.7  66.2  53.7  42.4  28.2    51.5
NEW BURNSIDE              | 1901-1964 |  34.6  37.2  46.8  56.5  65.8  74.3  78.1  76.8  70.5  59.5  46.6  36.5    56.9
NEWTON                    | 1995-2010 |  29.9  34.2  43.4  55.1  64.5  73.7  76.6  76.0  68.5  56.9  44.6  33.2    54.7
NEWTON 6 SSE              | 1948-2003 |  28.5  33.1  42.3  54.1  64.0  73.0  76.7  74.5  67.7  56.4  43.9  32.9    53.9
NORMAL                    | 1977-2010 |  24.4  28.7  39.4  51.5  62.5  72.2  75.4  73.6  66.5  54.2  41.6  29.0    51.6
OLIVE BRANCH              | 1983-1999 |  34.2  39.5  47.7  56.9  66.4  74.2  78.0  76.8  69.2  58.8  47.0  36.8    57.1
OLNEY                     | 1901-2010 |  31.0  34.1  44.4  55.1  64.8  73.8  77.4  76.0  69.3  57.7  45.1  34.2    55.2
OTTAWA 4 SW               | 1901-2010 |  24.3  27.8  38.9  51.3  61.9  71.2  75.3  73.4  66.1  54.6  41.1  28.5    51.2
PALESTINE                 | 1901-2010 |  30.5  33.9  44.2  55.2  64.9  73.9  77.4  75.8  68.8  57.3  44.8  33.9    55.1
PANA                      | 1901-2010 |  28.4  32.0  42.4  53.8  63.8  72.8  76.8  74.7  68.1  56.6  43.5  32.0    53.7
PARIS WATERWORKS          | 1901-2010 |  27.6  30.9  41.5  53.0  63.5  72.5  76.2  74.5  67.7  56.0  43.0  31.5    53.2
PARK FOREST               | 1952-2010 |  22.1  26.5  36.7  49.2  59.6  69.5  73.8  72.0  64.8  52.9  40.3  27.7    49.6
PAW PAW 1 E               | 1948-2010 |  18.6  22.9  34.6  47.5  58.6  68.6  72.0  69.7  62.6  50.6  37.5  24.0    47.3
PAXTON                    | 1987-2010 |  24.5  27.5  38.5  50.6  61.4  70.7  73.8  71.9  65.1  52.6  41.1  28.1    50.5
PEORIA WSO AIRPORT        | 1948-2010 |  23.4  28.1  38.9  51.6  62.0  71.5  75.3  73.4  65.8  54.0  40.6  28.3    51.1
PERRY 6 NW                | 1992-2010 |  26.2  30.9  41.1  52.8  62.7  71.8  75.4  74.3  65.4  54.3  42.8  30.8    52.4
PERU                      | 1963-2010 |  21.5  26.2  37.5  50.2  61.0  70.5  74.1  72.0  64.7  53.0  40.1  27.1    49.8
PIPER CITY                | 1949-2010 |  23.0  27.8  38.8  51.0  62.0  71.3  74.3  72.0  65.3  53.5  40.7  28.2    50.7
PITTSFIELD NO 2           | 1991-2010 |  27.3  31.5  41.2  53.4  63.0  72.2  75.4  74.5  67.3  55.8  43.1  30.3    52.9
POLO 5 NW                 | 1995-2010 |  21.8  26.6  37.1  50.2  60.5  70.2  72.8  71.4  63.8  52.2  39.3  25.8    49.3
PONTIAC                   | 1903-2010 |  24.7  28.5  39.2  51.5  62.2  71.6  75.5  73.5  66.7  55.0  41.4  29.1    51.6
 UNKNOWN                  | 2000-2010 |  25.5  27.0  41.4  53.9  63.2  72.7  75.0  73.9  67.0  54.5  43.6  28.7    52.2
PRINCETON                 | 1987-2010 |  23.6  27.4  38.8  51.2  62.0  71.6  74.9  73.0  65.2  53.0  40.1  27.3    50.7
PRINCEVILLE               | 1948-2010 |  21.4  26.4  38.2  50.8  61.1  70.1  73.3  71.4  63.9  52.6  39.9  26.8    49.7
QUINCY                    | 1901-1977 |  27.4  31.4  42.2  54.2  64.9  74.2  78.8  76.7  69.0  57.5  43.3  31.6    54.3
QUINCY FAA AIRPORT        | 1948-2010 |  25.1  29.9  40.1  52.9  63.0  72.2  76.3  74.3  66.5  55.3  42.0  29.8    52.3
QUINCY DAM 21             | 1948-2010 |  25.8  29.7  40.9  53.3  63.2  72.5  76.9  75.2  67.4  55.2  43.2  30.2    52.8
RAMSEY                    | 1990-2010 |  27.6  32.2  41.9  53.6  63.2  72.2  75.6  74.3  66.6  55.1  43.5  32.0    53.1
RANTOUL                   | 1948-2010 |  24.4  28.3  38.7  51.3  62.2  72.0  75.2  73.2  66.1  54.3  41.0  29.2    51.3
REND LAKE DAM             | 1974-2010 |  25.5  31.3  44.4  56.7  65.7  74.7  78.6  76.8  69.3  57.0  47.0  34.5    55.1
ROBERTS 3 N               | 1912-1968 |  25.6  28.8  37.7  50.9  62.0  71.5  74.4  72.1  65.9  55.7  40.6  28.8    51.2
 UNKNOWN                  | 2000-2010 |  29.3  30.3  43.6  55.1  64.0  74.0  75.7  75.1  67.8  55.0  45.0  32.9    54.0
ROCHELLE 6 NW             | 1948-1978 |  17.9  23.4  34.8  48.7  59.7  68.7  72.2  70.3  63.3  52.6  38.0  24.6    47.9
ROCHELLE                  | 1978-2010 |  19.4  23.7  35.5  47.9  59.0  69.0  71.9  70.6  62.9  50.5  37.9  24.5    47.7
ROCKFORD                  | 1905-1957 |  22.6  25.6  35.9  48.6  59.7  69.5  74.4  72.4  64.6  53.0  38.8  26.5    49.3
ROCKFORD WSO AP           | 1951-2010 |  19.6  24.4  35.2  48.4  59.4  69.1  73.2  71.3  63.3  51.6  38.0  24.9    48.2
ROCK ISLAND L&D 15        | 1985-2010 |  24.6  27.9  39.8  52.5  62.7  72.5  76.1  74.5  67.1  54.8  41.5  27.6    51.8
ROMEOVILLE WFO            | 1997-2010 |  24.5  28.6  39.0  51.6  61.1  70.1  74.1  72.6  66.0  53.5  41.7  28.1    50.9
ROSICLARE 5 NW            | 1968-2010 |  32.2  36.6  46.3  56.6  64.7  73.0  77.0  75.8  68.7  57.2  46.8  36.4    55.9
RUSHVILLE                 | 1901-2010 |  25.9  30.0  40.9  52.9  63.0  72.1  76.5  74.5  67.2  55.8  42.1  30.0    52.6
SALEM                     | 1948-2010 |  29.4  33.8  44.1  55.8  65.1  73.9  77.5  76.0  68.9  57.2  45.2  33.7    55.0
SHABBONA 5 NNE (CRN)      | 2003-2010 |  20.6  23.3  37.4  49.4  58.9  68.6  70.1  68.5  62.4  50.5  39.2  23.2    47.7
SHELBYVILLE DAM           | 1987-2010 |  27.7  30.4  42.6  54.0  64.3  73.0  76.3  75.5  68.6  55.2  44.1  32.6    53.7
SIDELL 5 NW               | 1948-2010 |  24.8  26.5  40.3  52.8  62.2  72.5  74.1  73.3  66.8  53.5  42.7  29.3    51.6
SMITHLAND LOCK & DAM      | 1980-2010 |  33.4  37.5  46.5  56.9  66.0  74.3  78.5  77.5  70.1  58.2  47.6  36.6    56.9
SPARTA 3 N                | 1901-2008 |  32.5  36.3  46.0  56.6  65.8  74.7  78.6  77.0  70.1  59.0  46.4  35.6    56.6
SPRINGFIELD WSO AP        | 1948-2010 |  25.9  30.4  40.9  53.3  63.8  72.9  76.2  74.2  67.1  55.7  42.6  30.7    52.8
SPRINGFIELD WB CITY       | 1948-1955 |  30.9  34.9  40.1  53.5  65.1  75.2  78.8  75.8  68.3  57.8  42.1  32.4    54.6
STOCKTON 1 N              | 1948-2010 |  18.6  23.4  34.2  47.9  59.2  68.4  72.0  70.1  62.2  51.1  36.9  23.6    47.3
STREAMWOOD                | 1994-2010 |  22.3  26.5  36.2  47.9  58.2  69.1  73.2  71.8  63.6  51.5  38.9  26.4    48.8
SULLIVAN 5 SSW            | 1948-2010 |  25.5  28.7  40.8  54.2  62.6  71.9  74.5  73.6  66.8  54.1  43.9  31.3    52.3
SYCAMORE                  | 1901-1965 |  21.4  24.1  35.1  47.5  59.0  68.5  73.2  71.5  63.7  52.5  38.1  25.2    48.3
TABLE GROVE               | 1948-1956 |  28.1  32.3  38.4  52.3  63.5  73.3  77.5  74.8  67.2  57.3  41.1  30.3    53.0
TISKILWA 2 SE             | 1948-1990 |  21.6  26.2  38.0  51.0  61.5  70.7  74.5  72.2  65.1  53.0  40.2  26.8    50.1
TUSCOLA                   | 1948-2010 |  26.6  30.8  41.1  53.6  64.0  73.2  76.2  74.1  67.7  56.0  42.8  31.6    53.1
URBANA                    | 1903-2010 |  26.0  29.6  40.1  51.5  62.2  71.5  75.2  73.4  66.7  55.0  41.6  30.0    51.9
UTICA STARVED ROCK DAM    | 1948-2005 |  23.4  28.7  37.9  51.3  61.9  69.4  74.5  72.3  65.7  53.3  41.6  28.4    50.7
VANDALIA                  | 1948-2010 |  27.4  32.7  42.6  54.3  63.9  73.0  76.8  75.3  67.3  55.1  44.1  32.3    53.8
VANDALIA FAA AIRPORT      | 1951-1973 |  27.8  32.4  41.0  53.8  63.2  73.1  76.1  74.1  67.3  55.7  42.1  32.6    53.3
VIRDEN 1 N                | 1948-2010 |  27.4  32.0  42.3  54.6  64.7  73.5  76.6  74.7  68.1  56.8  43.5  31.7    53.8
WALNUT                    | 1901-2010 |  22.1  25.9  37.3  50.2  61.5  70.8  75.0  72.7  65.2  53.5  39.6  26.6    50.0
WATERLOO                  | 1948-2010 |  29.9  35.1  45.1  56.1  65.6  74.2  78.2  76.3  69.3  58.3  46.0  34.5    55.7
WATSEKA 2 NW              | 1948-2010 |  23.8  27.8  38.3  50.4  61.2  70.7  73.7  71.6  65.0  53.4  40.8  28.6    50.5
WAUKEGAN 2 WNW            | 1923-2002 |  21.5  25.3  34.1  45.8  56.7  66.5  71.7  70.4  62.9  52.1  38.7  26.6    47.7
WHEATON 3 SE              | 1948-2007 |  23.0  27.5  37.5  50.2  60.5  70.1  74.2  72.6  65.3  53.9  40.3  28.1    50.2
WHITE HALL 1 E            | 1902-2010 |  27.9  31.9  42.5  54.0  63.8  72.8  76.7  75.0  67.9  56.5  43.5  31.9    53.7
WINCHESTER                | 1997-2010 |  27.6  31.3  42.3  54.5  64.1  72.6  76.0  75.0  67.5  55.4  44.6  30.9    53.5
WINDSOR                   | 1904-2010 |  28.1  31.8  42.0  53.6  63.6  72.6  76.3  74.6  68.1  56.4  43.1  32.0    53.5

 Copyright ©2011 Western Regional Climate Center - Desert Research Institute - Reno, Nevada.