Carterville, IL Weather & Climate Normals
Carterville's real weather, in one number
Carterville, IL scores 48/100 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.
Carterville's hottest and coldest months
Carterville's hottest month is Jul, averaging 78°F; its coldest is Jan, averaging 32°F, a 45.6°F swing across the year, one of the widest gaps in this dataset.
Carterville's weather across the year
| Month | Avg high | Avg low | Precip | Snow |
|---|---|---|---|---|
| Jan | 41°F | 23°F | 3.36in | 3.2in |
| Feb | 46°F | 26°F | 3.11in | 4in |
| Mar | 56°F | 35°F | 4.52in | 1.3in |
| Apr | 68°F | 44°F | 5.55in | 0in |
| May | 77°F | 55°F | 5.18in | 0in |
| Jun | 85°F | 64°F | 4.6in | 0in |
| Jul | 88°F | 68°F | 4.12in | 0in |
| Aug | 87°F | 65°F | 3.16in | 0in |
| Sep | 81°F | 56°F | 3.44in | 0in |
| Oct | 70°F | 44°F | 3.7in | 0.2in |
| Nov | 56°F | 35°F | 4.49in | 0in |
| Dec | 45°F | 27°F | 3.72in | 2.7in |
Apr, May, Jun, Sep, and Oct are the best time to see Carterville at its mildest; the rest of the year, plan around Jul's heat and Jan's cold.
Rain and snow in Carterville
Carterville averages 48.95in of precipitation a year across roughly 121 days with measurable rain or snow, and 11.4in of snow a year.
Where Carterville ranks
Carterville ranks 2504 of 4876 US cities in this dataset for comfort score, and 79 of 330 within IL. About 5,821 people live there.
If you need tomorrow's forecast, not the 30-year average
Everything above is a 30-year average from Carbondale Sewage Plt, IL US, 5.0 miles from Carterville, 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