Clarendon Hills, IL Weather & Climate Normals
Clarendon Hills's real weather, in one number
Clarendon Hills, 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.
Clarendon Hills's hottest and coldest months
Clarendon Hills's hottest month is Jul, averaging 74°F; its coldest is Jan, averaging 25°F, a 49.5°F swing across the year, one of the widest gaps in this dataset.
Clarendon Hills's weather across the year
| Month | Avg high | Avg low | Precip | Snow |
|---|---|---|---|---|
| Jan | 33°F | 17°F | 2.12in | 9.3in |
| Feb | 38°F | 20°F | 1.96in | 5.1in |
| Mar | 50°F | 29°F | 2.46in | 4.5in |
| Apr | 63°F | 38°F | 4.1in | 0.3in |
| May | 74°F | 49°F | 4.46in | 0in |
| Jun | 83°F | 59°F | 4.65in | 0in |
| Jul | 86°F | 63°F | 3.86in | 0in |
| Aug | 84°F | 62°F | 4.4in | 0in |
| Sep | 78°F | 54°F | 3.3in | 0in |
| Oct | 65°F | 43°F | 3.56in | 0in |
| Nov | 50°F | 32°F | 2.81in | 0.9in |
| Dec | 38°F | 23°F | 2.22in | 4.2in |
May, Jun, Jul, Aug, and Sep are the best time to see Clarendon Hills at its mildest; the rest of the year, plan around Jan's cold.
Rain and snow in Clarendon Hills
Clarendon Hills averages 39.9in of precipitation a year across roughly 116 days with measurable rain or snow, and 24.3in of snow a year.
Where Clarendon Hills ranks
Clarendon Hills ranks 3511 of 4876 US cities in this dataset for comfort score, and 148 of 330 within IL. About 8,703 people live there.
If you need tomorrow's forecast, not the 30-year average
Everything above is a 30-year average from Wheaton 3 Se, IL US, 6.0 miles from Clarendon Hills, 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