ILLINOIS
MONTHLY AVERAGE MINIMUM TEMPERATURES (F)
| PERIOD |
| OF RECORD | JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC YEAR
ALBION | 1948-2006 | 22.8 26.7 35.2 45.9 55.4 64.2 67.6 65.7 58.7 47.1 36.9 27.1 46.1
ALEDO | 1901-2010 | 14.0 17.6 28.2 39.5 50.1 59.6 63.6 61.5 53.5 42.5 30.4 18.9 39.9
ALTON DAM 26 | 1948-2010 | 20.4 24.3 33.4 45.1 55.4 64.8 69.0 66.9 58.8 47.1 36.0 25.6 45.6
ANNA 1 E | 1901-2010 | 24.9 27.7 36.3 46.2 55.2 63.7 67.5 65.9 58.9 47.5 37.1 28.2 46.6
ANTIOCH | 1948-2008 | 12.0 15.4 24.9 36.2 46.0 56.1 61.2 60.0 52.2 41.3 29.9 18.1 37.8
ATHENS 2 SW | 2000-2010 | 18.5 20.1 30.7 42.3 51.4 61.0 63.9 62.9 54.0 42.8 33.5 21.2 41.9
AURORA COLLEGE | 1901-2010 | 13.6 16.8 27.1 37.5 47.5 57.1 61.7 60.2 52.5 41.0 29.9 18.4 38.6
BARRINGTON | 1962-2010 | 11.4 14.4 26.0 37.6 46.8 56.8 61.6 60.0 52.1 40.6 30.1 16.9 37.9
BELLEVILLE SIU RESEARCH | 1948-2010 | 22.4 26.4 34.7 45.2 54.3 63.2 66.8 64.4 56.5 45.5 35.9 26.8 45.2
BENTLEY | 1948-2010 | 15.2 20.8 30.0 41.1 51.4 61.2 64.6 62.9 53.6 42.4 32.0 20.4 41.3
BENTON FOREST SERVICE | 1948-2009 | 24.2 27.2 35.6 45.5 54.2 63.1 67.7 65.8 57.0 45.2 36.9 25.9 45.7
BLOOMINGTON 5 W | 1999-2010 | 16.3 18.1 29.1 40.2 49.7 59.7 62.4 61.3 53.5 42.2 32.3 19.2 40.3
NORMAL | 1901-1977 | 17.5 20.6 30.2 40.7 50.9 60.3 64.1 62.4 55.3 44.4 32.4 21.9 41.7
BROOKPORT DAM 52 | 1948-2010 | 25.1 28.3 37.2 47.2 56.1 64.3 68.2 66.2 58.9 47.0 38.3 29.0 47.2
BROWNSTOWN 4 SW | 1992-2009 | 21.6 25.7 33.9 44.5 54.5 63.5 66.2 64.2 55.0 44.4 35.9 25.8 44.6
CAHOKIA | 1969-2010 | 21.0 24.5 34.5 44.8 54.2 63.6 67.5 65.6 57.3 45.1 35.2 25.4 44.9
CAIRO 3 N | 1948-2010 | 27.0 30.8 39.0 49.7 59.1 67.2 71.0 69.0 61.5 49.9 39.4 30.9 49.5
CARBONDALE SEWAGE PLANT | 1910-2010 | 23.9 26.8 35.1 45.2 54.1 63.0 66.6 64.5 56.8 44.9 35.4 27.3 45.3
CARLINVILLE | 1901-2010 | 19.7 23.1 32.2 42.6 52.3 61.4 65.1 63.3 55.8 44.7 33.7 24.0 43.2
CARLYLE | 1948-1964 | 22.6 26.0 33.3 43.6 54.6 63.6 67.0 64.8 56.5 45.6 33.1 26.0 44.7
CARLYLE RESERVOIR | 1962-2010 | 19.0 22.7 33.5 44.6 54.4 63.4 67.2 65.2 57.1 45.1 35.5 24.7 44.4
CARMI 3 | 1987-2010 | 24.9 26.8 34.9 44.9 54.3 63.5 66.9 64.8 56.1 43.8 35.8 26.2 45.2
CASEY | 1948-2010 | 19.1 23.0 32.8 42.1 52.0 62.0 65.4 63.4 54.9 43.6 34.7 22.4 42.9
CHAMPAIGN 9 SW (CRN) | 2002-2010 | 16.8 18.0 31.3 40.6 50.6 59.5 61.5 59.8 53.1 40.7 32.4 20.3 40.4
CHANNAHON DRESDEN ISLAN | 1948-2010 | 16.7 19.7 28.2 39.2 48.4 58.9 62.9 61.9 54.1 42.3 32.5 20.5 40.4
CHARLESTON | 1901-2010 | 20.2 23.1 32.5 42.8 52.6 61.5 65.3 63.5 56.3 45.2 34.3 24.2 43.5
CHENOA | 1948-2010 | 15.2 19.8 29.1 40.2 50.3 60.0 63.4 61.3 53.7 42.7 31.9 20.9 40.7
CHICAGO BOTANICAL GARDE | 1981-2010 | 16.2 19.2 28.3 38.0 47.3 57.0 63.1 62.3 53.9 42.3 32.8 20.6 40.1
CHICAGO O'HARE WSO ARPT | 1958-2010 | 14.7 18.7 28.4 38.7 48.2 57.8 63.2 62.3 54.2 42.7 32.0 20.2 40.1
CHICAGO UNIVERSITY | 1948-1994 | 18.4 22.5 30.9 41.2 50.8 60.7 66.5 65.5 58.2 47.5 35.4 23.8 43.5
CHICAGO MIDWAY AP 3 SW | 1928-2010 | 17.1 20.5 29.7 40.2 50.1 60.3 66.2 65.0 56.9 45.4 33.2 22.2 42.2
CHICAGO WB CITY | 1948-1965 | 20.4 23.9 30.8 41.9 52.1 62.6 68.5 68.0 60.3 50.5 36.0 24.4 45.0
CICERO | 1948-1959 | 19.2 22.5 28.9 40.0 50.2 60.3 65.4 63.2 54.8 45.6 32.8 22.6 42.1
COBDEN 2 S | 1951-1976 | 23.2 26.9 34.6 46.1 53.9 62.1 65.4 63.4 56.5 45.5 35.3 27.4 45.0
COMPTON 1 NW | 1991-2004 | 11.7 17.3 24.9 35.7 46.9 56.6 60.9 59.0 49.6 38.7 27.9 18.4 37.3
CONGERVILLE 2 NW | 1990-2010 | 14.9 19.6 28.7 39.6 49.3 59.2 62.5 60.4 51.6 40.0 31.0 19.3 39.7
DANVILLE | 1901-2010 | 18.4 21.6 30.7 40.9 50.5 59.8 63.6 61.9 54.5 43.1 32.9 23.1 41.7
DECATUR | 1901-2010 | 18.8 22.0 31.5 41.9 51.9 61.2 65.0 63.2 55.8 44.5 33.4 23.3 42.7
DE KALB | 1966-2010 | 11.8 16.5 27.1 37.9 48.2 58.8 62.8 60.8 52.8 40.9 30.1 18.4 38.8
DIXON 1 NW | 1901-2009 | 12.2 15.8 26.6 37.8 48.5 58.1 62.3 60.3 52.4 40.9 29.5 17.7 38.5
DIXON SPRINGS AGR CENTE | 1967-2010 | 24.9 28.7 37.4 47.0 55.0 63.2 67.1 65.5 58.3 47.0 38.5 29.4 46.8
DU QUOIN 2 S | 1901-2010 | 23.6 26.7 35.4 45.3 54.7 63.2 66.7 64.7 57.2 45.8 35.6 26.9 45.5
DWIGHT | 1990-2010 | 14.6 18.6 27.2 38.0 49.5 59.4 62.5 60.1 51.2 40.0 30.5 19.4 39.2
EAST ST LOUIS PARKS CO | 1948-1968 | 22.7 26.2 33.5 45.1 55.2 64.6 67.6 66.4 57.8 46.7 35.5 26.6 45.7
EFFINGHAM | 1901-2010 | 20.1 22.7 32.0 42.5 51.9 61.2 65.0 63.0 55.3 44.1 33.7 24.1 43.0
ELGIN | 1948-2010 | 11.8 16.0 26.1 37.1 47.6 57.2 62.5 60.7 52.0 39.5 29.9 17.5 38.2
ELIZABETH 5 S | 1984-2010 | 9.8 13.8 25.0 35.5 45.1 55.6 59.3 57.1 48.1 36.4 26.9 14.3 35.6
ELIZABETHTOWN 1 NW | 1948-1968 | 25.8 29.1 35.6 46.5 54.9 62.7 66.4 64.2 57.2 46.5 35.2 28.3 46.0
FAIRFIELD RADIO WFIW | 1901-2010 | 22.9 25.6 34.5 44.3 53.5 62.3 65.9 64.2 56.9 45.3 35.1 26.2 44.7
FARMER CITY | 1948-2010 | 15.1 19.4 29.7 40.2 50.7 59.9 63.4 60.9 53.7 42.3 31.9 21.7 40.7
FLORA | 2000-2010 | 22.0 23.6 33.2 44.2 53.8 63.1 65.2 63.9 55.3 43.8 34.8 24.1 43.9
FLORA 5 NW | 1901-2009 | 22.1 24.8 33.9 43.7 53.1 61.9 65.5 63.6 56.2 45.1 34.6 25.6 44.2
FREEPORT | 1909-1973 | 10.4 14.7 24.8 36.6 47.0 57.0 60.8 58.8 51.2 40.4 28.3 16.4 37.2
FREEPORT WASTE WTR PLT | 1948-2010 | 10.0 14.1 25.4 36.9 47.8 57.6 61.9 59.5 50.3 38.5 28.4 15.8 37.2
FULTON LOCK & DAM #13 | 1948-2010 | 11.9 16.1 26.8 39.6 50.6 60.2 64.4 62.6 54.1 43.0 31.0 18.3 39.9
GALESBURG | 1948-2010 | 13.9 18.6 28.4 40.5 51.2 61.0 65.1 63.1 54.6 43.2 31.0 19.7 40.9
GALVA | 1901-2010 | 13.5 17.0 27.4 38.7 49.6 59.2 63.3 61.1 53.2 42.0 30.1 18.5 39.5
GEBHARD WOODS STATE PAR | 1970-1995 | 11.7 16.3 28.4 38.6 48.8 58.4 63.0 60.4 51.9 40.0 30.7 19.0 38.9
GENESEO | 1948-2010 | 13.1 17.8 28.4 40.1 51.1 60.8 64.7 62.6 54.1 42.8 31.1 19.0 40.5
GIBSON CITY 1 E | 1948-2008 | 16.4 19.5 28.9 38.8 50.3 59.8 63.1 60.7 52.0 40.4 31.4 20.3 40.1
GLADSTONE DAM 18 | 1948-2010 | 14.6 19.8 29.0 41.6 52.5 62.2 65.8 64.2 55.2 43.8 32.5 20.4 41.8
GOLCONDA 1 SE | 1948-1980 | 25.1 29.0 34.7 45.6 55.1 64.2 68.2 66.6 58.5 46.9 33.5 27.8 46.3
GOLDEN | 1948-2008 | 15.8 19.5 30.7 41.6 51.9 61.2 65.0 62.5 54.5 43.6 32.5 21.2 41.7
GRAND CHAIN DAM 53 | 1948-2010 | 26.1 29.2 36.3 46.8 56.5 64.1 68.0 67.7 60.1 48.0 38.4 28.9 47.5
UNKNOWN | 2000-2010 | 24.1 24.0 35.4 46.6 54.5 64.4 66.9 65.9 57.8 45.4 36.9 25.9 45.6
GREENVILLE 1 E | 1901-2010 | 22.0 24.2 33.5 43.5 53.6 62.7 66.6 65.0 57.7 46.4 34.2 25.1 44.6
GRIGGSVILLE | 1901-2010 | 18.4 21.4 31.6 42.7 52.9 62.1 66.0 64.0 56.3 45.3 33.5 22.9 43.1
HARRISBURG | 1901-2010 | 24.8 27.5 36.4 45.9 54.9 63.5 67.1 65.3 57.9 46.0 36.6 28.4 46.2
HAVANA | 1901-1966 | 17.6 20.7 30.2 41.2 51.8 61.4 65.3 63.2 55.7 44.0 31.9 21.6 42.1
HAVANA 4 NNE | 1948-2010 | 15.3 19.6 30.0 41.1 51.0 60.8 64.7 62.1 53.2 41.7 31.7 20.6 41.0
HENNEPIN POWER PLANT | 1962-2009 | 12.4 16.5 27.7 38.6 48.6 58.1 62.0 60.1 51.9 40.4 30.0 18.2 38.7
HILLSBORO 2 SSW | 1901-2010 | 20.7 23.8 33.1 43.3 53.0 61.9 65.7 63.7 56.1 45.2 34.5 24.6 43.8
HOOPESTON | 1902-2010 | 18.1 21.0 30.2 40.4 50.6 60.1 63.7 61.9 54.7 43.5 32.9 22.3 41.6
ILLINOIS CITY DAM 16 | 1948-2010 | 13.4 15.3 29.5 41.6 51.0 62.0 63.0 63.2 55.1 41.9 32.6 16.7 40.4
IUKA 7 SW | 1997-2010 | 21.4 24.2 33.0 44.3 53.4 61.9 65.3 63.8 55.4 44.0 35.4 24.5 43.9
JACKSONVILLE 2 E | 1901-2010 | 17.8 20.9 30.3 41.0 51.0 60.4 64.0 62.1 54.3 43.2 32.2 22.1 41.6
JERSEYVILLE 2 SW | 1948-2010 | 18.6 22.6 31.6 42.6 52.5 61.6 65.2 62.8 54.5 43.4 33.3 23.3 42.7
JOLIET BRANDON RD DAM | 1948-2010 | 14.3 18.5 28.6 39.3 49.0 59.1 63.6 62.2 53.9 41.9 32.1 19.8 40.2
JOLIET | 1901-1974 | 15.7 19.7 27.8 39.7 49.0 59.2 63.1 61.5 53.9 44.1 31.9 20.7 40.5
KANKAKEE 3 SW | 1917-1973 | 16.3 20.0 28.7 38.9 48.8 58.9 62.6 60.8 53.8 43.0 31.6 21.1 40.4
KANKAKEE 4 NW | 1948-1960 | 17.8 20.9 27.6 38.5 49.1 59.3 62.8 60.6 52.1 42.5 29.6 21.0 40.1
KANKAKEE SEWAGE PLANT | 1948-2010 | 14.0 17.7 28.2 38.6 49.2 59.1 63.6 61.5 52.7 40.8 31.5 20.0 39.7
KASKASKIA R NAV LOCK | 1974-2010 | 21.1 24.4 33.7 44.2 54.2 63.1 67.3 64.9 56.3 44.3 35.2 24.7 44.4
KEWANEE | 1948-2010 | 12.7 17.2 27.0 38.6 49.5 59.2 63.0 60.8 52.1 41.2 30.0 18.6 39.2
LACON 1 N | 1950-2009 | 15.6 19.6 29.6 40.9 50.8 60.0 63.9 62.2 54.3 43.0 32.3 21.4 41.1
LA HARPE 1 SW | 1901-2010 | 14.9 18.6 28.9 39.9 50.4 59.9 63.7 61.7 53.9 42.6 30.7 19.7 40.4
LAKE VILLA 2 NE | 1985-2005 | 14.9 18.8 26.9 37.1 47.3 57.5 62.8 62.0 53.8 42.0 31.2 19.8 39.5
LA SALLE PERU | 1948-1963 | 16.0 20.8 28.0 40.0 50.9 60.5 64.6 63.0 54.1 44.0 31.3 21.2 41.2
LAWRENCEVILLE | 1967-2010 | 23.0 25.9 33.9 43.6 54.3 63.5 66.7 64.4 56.4 45.0 35.8 26.3 44.9
LINCOLN | 1906-2010 | 17.5 21.2 30.1 41.1 51.3 60.7 64.2 62.2 54.6 43.0 32.3 22.2 41.7
MAKANDA 1 NW | 1951-1976 | 24.4 28.1 35.3 47.3 55.4 64.0 67.2 65.5 58.8 48.8 37.4 28.6 46.7
MARENGO | 1901-2010 | 11.8 14.7 25.5 36.1 46.3 56.2 60.8 59.1 51.4 40.3 29.0 17.1 37.4
MARION 4 NNE | 1948-1998 | 20.3 23.9 33.4 43.2 52.6 61.6 66.1 63.6 56.0 43.8 34.9 25.4 43.7
MARSEILLES LOCK | 1948-2010 | 14.3 18.1 27.5 38.5 48.6 57.8 62.0 60.8 52.8 41.1 30.6 18.2 39.2
MARSHALL | 1948-2004 | 18.1 21.7 31.3 42.0 51.4 59.6 63.2 60.7 54.3 43.4 34.0 24.2 42.0
MASON CITY 1 W | 1948-2010 | 15.8 20.5 31.1 41.8 52.1 61.3 64.7 62.3 54.7 43.6 32.8 21.3 41.8
MATTOON | 1948-2010 | 18.5 22.7 31.0 42.0 52.4 61.6 65.4 63.2 55.4 44.3 33.2 23.1 42.7
MCHENRY LOCK & DAM | 1948-2010 | 12.7 16.4 26.1 37.2 46.9 57.3 61.5 60.2 51.1 39.8 30.2 18.2 38.1
MC LEANSBORO 2 E | 1901-2002 | 23.0 25.9 34.7 44.5 53.9 62.6 66.3 64.3 57.1 45.6 35.3 26.5 45.0
MINONK | 1901-2010 | 14.7 18.1 28.3 38.7 49.1 58.7 62.5 60.5 53.0 41.9 30.6 19.4 39.6
MOLINE WSO AP | 1948-2010 | 12.9 17.6 27.9 39.7 50.2 60.1 64.5 62.4 53.3 42.1 30.5 18.7 40.0
MONMOUTH | 1901-2010 | 15.1 18.9 29.1 40.1 50.4 59.8 63.8 61.7 54.0 43.1 31.1 20.1 40.6
MONMOUTH 4 NW | 1995-2010 | 13.6 18.1 27.4 39.4 50.5 60.2 63.2 62.3 52.4 41.0 30.3 18.5 39.7
MORRIS 5 N | 1948-2010 | 14.6 18.8 27.2 38.8 49.1 59.4 63.0 61.1 53.1 42.2 30.9 19.7 39.8
MORRISON | 1901-2010 | 12.1 15.8 26.8 37.9 48.7 58.2 62.2 60.1 52.0 40.7 29.1 17.5 38.4
MORRISONVILLE | 1948-2010 | 18.0 21.5 31.1 41.7 52.5 61.7 64.9 62.9 54.3 42.3 32.9 22.0 42.2
MORRISONVILLE 4 SE | 1901-1971 | 19.7 22.4 31.4 41.7 51.7 61.0 64.4 62.4 55.5 44.4 32.8 23.3 42.6
MOUNT CARMEL | 1948-2010 | 22.1 24.4 33.7 43.9 54.0 63.1 66.9 64.5 56.2 44.3 35.4 25.4 44.5
MOUNT CARMEL 3 N | 1902-1977 | 23.1 25.4 35.0 44.8 54.0 62.8 66.3 64.5 57.5 45.8 35.1 26.6 45.1
MOUNT CARROLL | 1901-2010 | 10.6 14.2 25.4 36.2 46.8 56.1 60.1 58.1 50.2 38.9 28.0 16.1 36.7
MT VERNON 3 NE | 1901-2010 | 21.9 24.7 33.7 44.1 53.5 62.4 66.2 64.4 56.9 45.2 34.8 25.4 44.4
MOWEAQUA | 1963-2010 | 17.2 21.2 30.9 41.6 51.5 60.7 64.3 61.7 54.2 43.1 33.2 22.9 41.9
MUNDELEIN 4 WSW | 1999-2010 | 14.6 16.1 26.3 37.5 47.3 58.0 62.4 61.5 53.2 41.8 31.8 17.6 39.0
NASHVILLE 4 NE | 1948-2010 | 21.8 25.8 35.2 45.6 55.0 63.8 67.3 65.1 57.9 46.9 36.8 26.5 45.6
NEW BOSTON DAM 17 | 1948-2010 | 15.8 19.7 29.8 42.5 51.9 61.8 65.5 63.5 54.5 43.3 33.6 20.5 41.9
NEW BURNSIDE | 1901-1964 | 24.6 26.7 35.3 44.7 53.9 62.3 65.7 64.2 57.4 46.3 35.4 27.1 45.3
NEWTON | 1995-2010 | 21.7 25.8 33.4 44.3 54.1 63.2 66.0 65.2 56.1 45.1 34.7 25.3 44.6
NEWTON 6 SSE | 1948-2003 | 20.0 23.8 32.3 43.0 52.5 61.8 65.5 62.8 55.0 43.9 34.1 24.7 43.3
NORMAL | 1977-2010 | 16.1 19.6 29.2 40.0 51.0 61.0 64.8 62.7 54.4 42.8 32.4 20.8 41.2
OLIVE BRANCH | 1983-1999 | 25.3 29.8 36.8 45.0 55.3 63.2 67.4 65.8 57.5 46.2 37.1 28.0 46.5
OLNEY | 1901-2010 | 22.3 24.8 34.0 43.9 53.2 62.1 65.7 63.9 56.8 45.2 35.0 25.9 44.4
OTTAWA 4 SW | 1901-2010 | 15.9 19.0 29.1 39.7 50.0 59.6 63.7 62.0 54.2 42.9 31.9 20.6 40.7
PALESTINE | 1901-2010 | 21.9 24.7 33.8 43.9 53.3 62.1 65.5 63.9 56.0 44.8 34.9 25.5 44.2
PANA | 1901-2010 | 19.9 23.1 32.2 42.6 52.6 61.6 65.5 63.4 56.3 45.1 34.0 23.9 43.4
PARIS WATERWORKS | 1901-2010 | 19.2 22.0 31.5 42.0 52.3 61.4 65.0 63.1 55.8 44.5 33.6 23.4 42.8
PARK FOREST | 1952-2010 | 14.2 18.2 28.0 38.9 48.8 58.8 63.7 62.1 54.2 42.4 31.9 20.1 40.1
PAW PAW 1 E | 1948-2010 | 10.5 14.5 25.3 36.4 47.1 57.5 61.4 59.1 51.1 39.4 28.7 16.2 37.3
PAXTON | 1987-2010 | 16.7 19.1 28.8 39.4 50.5 60.2 63.5 61.0 52.4 40.6 31.8 20.4 40.4
PEORIA WSO AIRPORT | 1948-2010 | 15.3 19.7 29.5 40.9 51.1 60.8 65.1 63.2 54.8 43.3 31.9 20.6 41.4
PERRY 6 NW | 1992-2010 | 17.1 21.2 30.4 41.2 51.7 60.9 64.3 62.6 52.4 41.7 32.7 21.9 41.5
PERU | 1963-2010 | 13.0 17.3 27.5 38.6 49.0 58.7 62.8 60.8 52.2 41.1 30.9 19.1 39.3
PIPER CITY | 1949-2010 | 14.4 18.7 28.4 38.6 49.3 59.2 62.7 60.1 52.3 41.4 31.4 20.2 39.7
PITTSFIELD NO 2 | 1991-2010 | 18.5 22.3 30.7 42.1 52.4 62.2 65.2 63.4 54.7 44.0 33.0 21.4 42.5
POLO 5 NW | 1995-2010 | 13.3 17.7 26.6 38.1 48.8 58.9 61.4 59.9 50.6 40.2 29.6 17.5 38.5
PONTIAC | 1903-2010 | 16.7 20.0 29.7 40.3 50.7 60.5 64.5 62.7 55.2 43.8 32.4 21.4 41.5
UNKNOWN | 2000-2010 | 16.8 17.1 30.5 41.6 51.9 61.8 63.9 63.1 55.3 43.0 33.0 20.2 41.5
PRINCETON | 1987-2010 | 16.6 19.8 29.8 40.7 51.3 61.3 64.9 63.5 54.6 43.1 32.0 20.4 41.5
PRINCEVILLE | 1948-2010 | 12.3 16.7 27.4 38.4 48.9 58.4 61.6 59.5 51.0 40.4 29.8 18.1 38.5
QUINCY | 1901-1977 | 18.6 22.2 32.0 43.3 54.0 63.4 67.7 65.7 57.9 46.7 34.0 23.5 44.1
QUINCY FAA AIRPORT | 1948-2010 | 16.9 21.4 30.7 42.6 52.9 62.1 66.2 64.1 55.5 44.6 32.9 22.0 42.7
QUINCY DAM 21 | 1948-2010 | 17.3 20.6 31.0 42.8 52.9 62.2 66.6 64.8 56.0 44.0 33.6 21.8 42.8
RAMSEY | 1990-2010 | 19.6 23.4 31.9 42.4 52.5 61.7 64.9 62.6 53.5 42.5 33.6 23.9 42.7
RANTOUL | 1948-2010 | 15.8 19.3 28.9 40.0 50.6 60.7 64.1 61.8 53.7 42.4 31.5 21.1 40.8
REND LAKE DAM | 1974-2010 | 16.9 22.0 34.9 46.2 55.2 64.2 68.2 66.1 58.4 45.7 37.5 26.1 45.1
ROBERTS 3 N | 1912-1968 | 17.1 20.1 28.1 39.7 49.8 59.5 62.8 60.4 53.1 43.1 31.0 20.6 40.4
UNKNOWN | 2000-2010 | 20.7 21.1 33.2 43.5 53.2 62.9 64.5 63.1 54.3 42.5 34.1 24.4 43.1
ROCHELLE 6 NW | 1948-1978 | 8.8 14.3 25.6 37.4 47.8 57.2 60.9 59.1 51.7 41.3 29.0 16.4 37.5
ROCHELLE | 1978-2010 | 10.8 15.1 25.9 36.7 47.6 57.8 60.8 59.7 50.7 38.6 28.7 16.1 37.4
ROCKFORD | 1905-1957 | 13.8 16.9 26.3 37.2 47.7 57.8 62.1 60.4 52.6 41.5 29.9 18.8 38.7
ROCKFORD WSO AP | 1951-2010 | 11.4 16.1 26.1 37.5 47.9 57.9 62.5 60.8 52.0 40.7 29.3 17.2 38.3
ROCK ISLAND L&D 15 | 1985-2010 | 16.9 20.1 30.8 42.6 53.3 63.7 67.8 66.0 57.4 45.2 33.4 20.4 43.1
ROMEOVILLE WFO | 1997-2010 | 17.2 20.6 29.7 40.9 50.5 60.0 64.3 63.2 55.2 43.6 33.4 20.8 41.6
ROSICLARE 5 NW | 1968-2010 | 22.5 25.8 34.8 43.9 53.0 61.7 66.0 64.3 56.3 44.2 35.9 26.8 44.6
RUSHVILLE | 1901-2010 | 17.2 20.8 30.9 41.8 51.8 61.3 65.3 63.2 55.6 44.3 32.4 21.7 42.2
SALEM | 1948-2010 | 20.7 24.4 33.7 44.4 53.9 62.7 66.6 64.7 57.0 45.2 35.4 25.3 44.5
SHABBONA 5 NNE (CRN) | 2003-2010 | 13.3 15.8 28.2 37.4 47.5 58.0 59.6 58.0 49.8 39.0 30.0 15.8 37.7
SHELBYVILLE DAM | 1987-2010 | 19.3 21.5 32.6 43.4 53.9 63.1 66.1 65.1 56.6 43.8 34.5 24.9 43.7
SIDELL 5 NW | 1948-2010 | 16.8 17.8 30.1 40.9 51.1 61.6 63.3 62.0 54.0 41.6 33.0 21.8 41.2
SMITHLAND LOCK & DAM | 1980-2010 | 24.5 27.7 35.9 45.4 55.2 63.8 68.3 67.0 59.1 46.6 37.1 27.6 46.5
SPARTA 3 N | 1901-2008 | 23.6 26.5 35.2 45.2 54.3 63.2 66.8 65.1 57.8 46.7 36.2 27.0 45.6
SPRINGFIELD WSO AP | 1948-2010 | 17.8 22.0 31.4 42.5 52.7 62.1 65.8 63.7 55.3 44.4 33.5 22.9 42.8
SPRINGFIELD WB CITY | 1948-1955 | 23.2 26.8 31.4 43.4 54.2 65.0 68.9 65.5 57.0 47.2 33.4 25.0 45.1
STOCKTON 1 N | 1948-2010 | 10.2 15.1 25.2 37.0 48.0 57.6 61.4 59.5 51.1 40.4 28.5 15.9 37.5
STREAMWOOD | 1994-2010 | 12.7 16.0 24.5 34.8 44.8 55.8 60.2 59.1 49.8 38.5 28.0 16.9 36.8
SULLIVAN 5 SSW | 1948-2010 | 17.5 19.8 30.8 42.7 52.0 61.5 64.1 62.3 53.9 42.5 34.1 23.6 42.1
SYCAMORE | 1901-1965 | 12.5 15.1 25.4 35.8 46.5 55.9 60.2 58.7 51.2 40.6 28.6 16.8 37.3
TABLE GROVE | 1948-1956 | 19.6 23.8 28.7 41.4 52.6 63.0 67.1 63.9 55.4 45.7 31.2 22.0 42.9
TISKILWA 2 SE | 1948-1990 | 12.8 16.8 28.2 39.2 48.8 58.2 62.4 60.0 52.3 41.0 31.0 18.5 39.1
TUSCOLA | 1948-2010 | 18.2 21.7 30.9 41.7 52.0 61.4 64.8 62.4 55.0 43.7 33.1 23.5 42.4
URBANA | 1903-2010 | 18.2 21.5 30.9 41.0 51.5 60.7 64.7 62.8 55.4 44.1 32.9 22.6 42.2
UTICA STARVED ROCK DAM | 1948-2005 | 15.6 20.3 28.2 40.1 50.9 59.2 63.8 61.8 53.5 42.5 32.4 20.2 40.7
VANDALIA | 1948-2010 | 19.2 23.3 32.8 43.4 53.3 62.6 66.3 64.4 55.2 43.1 34.4 24.0 43.5
VANDALIA FAA AIRPORT | 1951-1973 | 18.7 23.0 30.9 42.5 51.4 61.1 64.4 61.9 54.0 42.5 31.6 24.1 42.2
VIRDEN 1 N | 1948-2010 | 19.1 23.2 32.4 43.6 53.5 62.6 65.8 63.6 56.0 45.3 34.2 23.8 43.6
WALNUT | 1901-2010 | 13.7 17.4 27.9 38.9 49.8 59.4 63.5 61.4 53.7 42.3 30.7 18.8 39.8
WATERLOO | 1948-2010 | 21.1 25.6 34.9 45.0 54.8 63.5 67.5 65.4 58.0 46.8 36.5 26.1 45.4
WATSEKA 2 NW | 1948-2010 | 15.8 19.0 28.7 39.2 49.5 59.2 62.6 60.2 52.5 41.5 31.7 20.9 40.1
WAUKEGAN 2 WNW | 1923-2002 | 13.4 17.2 25.7 36.4 46.2 56.0 61.9 60.8 53.0 42.2 30.4 19.1 38.5
WHEATON 3 SE | 1948-2007 | 14.6 18.4 27.4 38.1 47.6 57.4 62.4 61.0 53.0 42.2 31.3 20.1 39.5
WHITE HALL 1 E | 1902-2010 | 18.6 22.1 31.6 42.3 52.2 61.4 65.1 63.4 55.7 44.1 33.0 22.9 42.7
WINCHESTER | 1997-2010 | 18.8 21.6 31.2 42.5 52.8 62.0 65.1 63.4 54.2 42.8 33.6 22.1 42.5
WINDSOR | 1904-2010 | 19.6 22.9 31.9 42.1 52.1 61.1 64.6 62.7 55.7 44.5 33.5 23.8 42.9
Copyright ©2011 Western Regional Climate Center - Desert Research Institute - Reno, Nevada.