Illinois climate

Historical climate data for 1294 cities in Illinois — drawn from NOAA 1991-2020 normals at each city's primary weather station.

Warmest city
Dolton
°F annual avg
Coldest city
Rockton
45.4°F annual avg
Wettest city
Hollowayville
in/yr
Snowiest city
Old Mill Creek
43.4 in/yr
Frost-date data is available for 899 cities in Illinois — the average last spring frost, first fall frost, and growing-season length for each. Find your city →

Illinois climate rankings

Warmest cities

  1. Bellwood — °F
  2. Henning — °F
  3. Apple River — °F
  4. Clifton — °F
  5. St. Rose — °F
  6. Norris — °F
  7. Dolton — °F
  8. Calumet City — °F
  9. Timberlane — °F
  10. Mound Station — °F

Coldest cities

  1. South Beloit — 45.4°F
  2. Rockton — 45.4°F
  3. Galena — 47.0°F
  4. Hebron — 47.0°F
  5. Orangeville — 47.3°F
  6. Winslow — 47.3°F
  7. Hanover — 47.5°F
  8. Elizabeth — 47.5°F
  9. Pearl City — 47.7°F
  10. Freeport — 47.7°F

Wettest cities

  1. Camp Point — in/yr
  2. Chicago — in/yr
  3. De Pue — in/yr
  4. Park City — in/yr
  5. Browns — in/yr
  6. North Chicago — in/yr
  7. Lake Bluff — in/yr
  8. Hollowayville — in/yr
  9. Bellmont — in/yr
  10. Green Oaks — in/yr

Driest cities

  1. Bannockburn — 32.3 in/yr
  2. Mount Prospect — 32.3 in/yr
  3. Buffalo Grove — 32.3 in/yr
  4. Wheeling — 32.3 in/yr
  5. Lincolnshire — 32.3 in/yr
  6. Rolling Meadows — 32.3 in/yr
  7. Prospect Heights — 32.3 in/yr
  8. Riverwoods — 32.3 in/yr
  9. Arlington Heights — 32.3 in/yr
  10. Batavia — 33.2 in/yr

All Illinois cities

Weather stations in Illinois → National climate rankings →