Roscoe, IL Weather & Climate Normals
Roscoe's real weather, in one number
Roscoe, IL scores 43/100 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.
Roscoe's hottest and coldest months
Roscoe's hottest month is Jul, averaging 70°F; its coldest is Jan, averaging 18°F, a 51.8°F swing across the year, one of the widest gaps in this dataset.
Roscoe's weather across the year
| Month | Avg high | Avg low | Precip | Snow |
|---|---|---|---|---|
| Jan | 25°F | 11°F | 1.6in | 9.8in |
| Feb | 29°F | 14°F | 1.52in | 7.3in |
| Mar | 42°F | 24°F | 2.13in | 4.3in |
| Apr | 55°F | 34°F | 3.72in | 1.1in |
| May | 67°F | 46°F | 4.34in | 0in |
| Jun | 76°F | 56°F | 5.64in | 0in |
| Jul | 80°F | 60°F | 3.36in | 0in |
| Aug | 78°F | 58°F | 4.14in | 0in |
| Sep | 71°F | 50°F | 3.83in | 0in |
| Oct | 58°F | 39°F | 2.77in | 0.2in |
| Nov | 43°F | 27°F | 2.4in | 2.7in |
| Dec | 31°F | 17°F | 1.96in | 10.2in |
May, Jun, Jul, Aug, and Sep are the best time to see Roscoe at its mildest; the rest of the year, plan around Jan's cold.
Rain and snow in Roscoe
Roscoe averages 37.41in of precipitation a year across roughly 108 days with measurable rain or snow, and 35.6in of snow a year.
Where Roscoe ranks
Roscoe ranks 4062 of 4876 US cities in this dataset for comfort score, and 263 of 330 within IL. About 10,981 people live there.
If you need tomorrow's forecast, not the 30-year average
Everything above is a 30-year average from Beloit, WI US, 5.5 miles from Roscoe, 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