Spring Valley, IL Weather & Climate Normals
Spring Valley's real weather, in one number
Spring Valley, 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.
Spring Valley's hottest and coldest months
Spring Valley's hottest month is Jul, averaging 73°F; its coldest is Jan, averaging 22°F, a 51.4°F swing across the year, one of the widest gaps in this dataset.
Spring Valley's weather across the year
| Month | Avg high | Avg low | Precip | Snow |
|---|---|---|---|---|
| Jan | 30°F | 14°F | 1.81in | 8.6in |
| Feb | 35°F | 18°F | 1.77in | 5.5in |
| Mar | 48°F | 27°F | 2.28in | 4in |
| Apr | 61°F | 38°F | 3.77in | 0.6in |
| May | 73°F | 49°F | 4.49in | 0in |
| Jun | 81°F | 59°F | 4.62in | 0in |
| Jul | 84°F | 63°F | 3.89in | 0in |
| Aug | 82°F | 61°F | 3.7in | 0in |
| Sep | 77°F | 53°F | 3.41in | 0in |
| Oct | 64°F | 41°F | 3.5in | 0.2in |
| Nov | 48°F | 30°F | 2.71in | 0.9in |
| Dec | 36°F | 20°F | 2.1in | 8.7in |
May, Jun, Jul, Aug, and Sep are the best time to see Spring Valley at its mildest; the rest of the year, plan around Jan's cold.
Rain and snow in Spring Valley
Spring Valley averages 38.05in of precipitation a year across roughly 121 days with measurable rain or snow, and 28.5in of snow a year.
Where Spring Valley ranks
Spring Valley ranks 3931 of 4876 US cities in this dataset for comfort score, and 225 of 330 within IL. About 5,404 people live there.
If you need tomorrow's forecast, not the 30-year average
Everything above is a 30-year average from Peru, IL US, 4.4 miles from Spring Valley, 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