Normal, IL Weather & Climate Normals
Normal's real weather, in one number
Normal, IL scores 46/100 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.
Normal's hottest and coldest months
Normal's hottest month is Jul, averaging 75°F; its coldest is Jan, averaging 25°F, a 50°F swing across the year, one of the widest gaps in this dataset.
Normal's weather across the year
| Month | Avg high | Avg low | Precip | Snow |
|---|---|---|---|---|
| Jan | 33°F | 16°F | 2.43in | 7.5in |
| Feb | 38°F | 19°F | 1.99in | 5.5in |
| Mar | 50°F | 28°F | 2.61in | 2.2in |
| Apr | 63°F | 38°F | 3.72in | 0.5in |
| May | 74°F | 50°F | 4.81in | 0in |
| Jun | 83°F | 60°F | 4.08in | 0in |
| Jul | 86°F | 63°F | 4.12in | 0in |
| Aug | 84°F | 61°F | 3.83in | 0in |
| Sep | 79°F | 53°F | 3.22in | 0in |
| Oct | 66°F | 42°F | 3.48in | 0in |
| Nov | 50°F | 31°F | 2.8in | 0.8in |
| Dec | 38°F | 21°F | 2.3in | 3.6in |
May, Jun, Jul, Aug, and Sep are the best time to see Normal at its mildest; the rest of the year, plan around Jan's cold.
Rain and snow in Normal
Normal averages 39.39in of precipitation a year across roughly 113 days with measurable rain or snow, and 20.1in of snow a year.
Where Normal ranks
Normal ranks 2929 of 4876 US cities in this dataset for comfort score, and 96 of 330 within IL. About 53,304 people live there.
If you need tomorrow's forecast, not the 30-year average
Everything above is a 30-year average from Normal 4ne, IL US, 3.0 miles from Normal, 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