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
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