Mascoutah, IL Weather & Climate Normals
Mascoutah's real weather, in one number
Mascoutah, 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. 4 of the year's 12 months average between 55 and 75°F, the range this site counts as mild.
Mascoutah's hottest and coldest months
Mascoutah's hottest month is Jul, averaging 79°F; its coldest is Jan, averaging 34°F, a 45.4°F swing across the year, one of the widest gaps in this dataset.
Mascoutah's weather across the year
| Month | Avg high | Avg low | Precip | Snow |
|---|---|---|---|---|
| Jan | 43°F | 24°F | 2.56in | 3.4in |
| Feb | 49°F | 28°F | 2.16in | 3.3in |
| Mar | 59°F | 36°F | 3.44in | 1in |
| Apr | 71°F | 46°F | 4.9in | 0in |
| May | 79°F | 56°F | 5.05in | 0in |
| Jun | 87°F | 65°F | 4.62in | 0in |
| Jul | 90°F | 68°F | 4.03in | 0in |
| Aug | 89°F | 65°F | 3.92in | 0in |
| Sep | 83°F | 57°F | 3.35in | 0in |
| Oct | 73°F | 47°F | 3.12in | 0in |
| Nov | 58°F | 37°F | 3.6in | 0.6in |
| Dec | 46°F | 28°F | 2.61in | 2.9in |
Apr, May, Sep, and Oct are the best time to see Mascoutah at its mildest; the rest of the year, plan around Jul's heat and Jan's cold.
Rain and snow in Mascoutah
Mascoutah averages 43.36in of precipitation a year across roughly 100 days with measurable rain or snow, and 11.2in of snow a year.
Where Mascoutah ranks
Mascoutah ranks 4078 of 4876 US cities in this dataset for comfort score, and 270 of 330 within IL. About 9,118 people live there.
If you need tomorrow's forecast, not the 30-year average
Everything above is a 30-year average from Belleville Siu Rsch, IL US, 2.5 miles from Mascoutah, not a prediction for any specific day.
More on how this is worked out
What a 30-year climate normal actually is · Why this uses the nearest NOAA station