Chicago Heights, IL Weather & Climate Normals
Chicago Heights's real weather, in one number
Chicago Heights, IL scores 45/100 on this site's reading of NOAA's own 30-year normals: strongly seasonal. Comfortable weather is limited to a shorter window; summers, winters, or precipitation swing wide. 5 of the year's 12 months average between 55 and 75°F, the range this site counts as mild.
Chicago Heights's hottest and coldest months
Chicago Heights's hottest month is Jul, averaging 74°F; its coldest is Jan, averaging 23°F, a 50.7°F swing across the year, one of the widest gaps in this dataset.
Chicago Heights's weather across the year
| Month | Avg high | Avg low | Precip | Snow |
|---|---|---|---|---|
| Jan | 31°F | 15°F | 2.49in | 10.2in |
| Feb | 35°F | 18°F | 2.15in | 7.5in |
| Mar | 46°F | 28°F | 2.65in | 4.9in |
| Apr | 59°F | 38°F | 4.02in | 0.5in |
| May | 71°F | 49°F | 4.57in | 0in |
| Jun | 80°F | 59°F | 4.91in | 0in |
| Jul | 84°F | 64°F | 4.73in | 0in |
| Aug | 82°F | 62°F | 4.02in | 0in |
| Sep | 76°F | 55°F | 3.44in | 0in |
| Oct | 63°F | 42°F | 3.65in | 0.2in |
| Nov | 48°F | 31°F | 3in | 0.9in |
| Dec | 36°F | 22°F | 2.47in | 4in |
May, Jun, Jul, Aug, and Sep are the best time to see Chicago Heights at its mildest; the rest of the year, plan around Jan's cold.
Rain and snow in Chicago Heights
Chicago Heights averages 42.1in of precipitation a year across roughly 124 days with measurable rain or snow, and 28.2in of snow a year.
Where Chicago Heights ranks
Chicago Heights ranks 3307 of 4876 US cities in this dataset for comfort score, and 124 of 330 within IL. About 26,533 people live there.
If you need tomorrow's forecast, not the 30-year average
Everything above is a 30-year average from Park Forest, IL US, 2.6 miles from Chicago Heights, not a prediction for any specific day.
More on how this is worked out
What a 30-year climate normal actually is · Why this uses the nearest NOAA station