South Beloit, IL Weather & Climate Normals
South Beloit's real weather, in one number
South Beloit, 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.
South Beloit's hottest and coldest months
South Beloit'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.
South Beloit'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 South Beloit at its mildest; the rest of the year, plan around Jan's cold.
Rain and snow in South Beloit
South Beloit averages 37.41in of precipitation a year across roughly 108 days with measurable rain or snow, and 35.6in of snow a year.
Where South Beloit ranks
South Beloit ranks 4091 of 4876 US cities in this dataset for comfort score, and 273 of 330 within IL. About 7,983 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, 1.3 miles from South Beloit, 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