Carbondale, IL Weather & Climate Normals
Carbondale's real weather, in one number
Carbondale, 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.
Carbondale's hottest and coldest months
Carbondale'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.
Carbondale'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 Carbondale at its mildest; the rest of the year, plan around Jul's heat and Jan's cold.
Rain and snow in Carbondale
Carbondale averages 48.95in of precipitation a year across roughly 121 days with measurable rain or snow, and 11.4in of snow a year.
Where Carbondale ranks
Carbondale ranks 2358 of 4876 US cities in this dataset for comfort score, and 46 of 330 within IL. About 22,223 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, 3.2 miles from Carbondale, 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