Carpentersville, IL Weather & Climate Normals
Carpentersville's real weather, in one number
Carpentersville, IL scores 44/100 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.
Carpentersville's hottest and coldest months
Carpentersville's hottest month is Jul, averaging 74°F; its coldest is Jan, averaging 22°F, a 51.6°F swing across the year, one of the widest gaps in this dataset.
Carpentersville's weather across the year
| Month | Avg high | Avg low | Precip | Snow |
|---|---|---|---|---|
| Jan | 30°F | 14°F | 2.02in | 9.5in |
| Feb | 34°F | 17°F | 1.87in | 8in |
| Mar | 46°F | 26°F | 2.37in | 3.7in |
| Apr | 59°F | 37°F | 3.96in | 0.8in |
| May | 70°F | 48°F | 5.12in | 0in |
| Jun | 80°F | 58°F | 4.46in | 0in |
| Jul | 84°F | 63°F | 3.98in | 0in |
| Aug | 82°F | 61°F | 4.33in | 0in |
| Sep | 76°F | 53°F | 3.53in | 0in |
| Oct | 63°F | 41°F | 3.31in | 0in |
| Nov | 48°F | 30°F | 2.68in | 1.4in |
| Dec | 36°F | 20°F | 2.22in | 8.7in |
May, Jun, Jul, Aug, and Sep are the best time to see Carpentersville at its mildest; the rest of the year, plan around Jan's cold.
Rain and snow in Carpentersville
Carpentersville averages 39.85in of precipitation a year across roughly 124 days with measurable rain or snow, and 32.1in of snow a year.
Where Carpentersville ranks
Carpentersville ranks 3710 of 4876 US cities in this dataset for comfort score, and 173 of 330 within IL. About 37,144 people live there.
If you need tomorrow's forecast, not the 30-year average
Everything above is a 30-year average from Elgin, IL US, 4.2 miles from Carpentersville, not a prediction for any specific day.
More on how this is worked out
How the comfort score is calculated · Why some cities show no snow or rain figure