About Mascoutah, IL's Climate & Weather History

Mascoutah is a city of approximately 8,000 people in Illinois, United States. Located in the Central Time Zone at 38.5°N latitude.

In 2025, Mascoutah recorded an average annual temperature of 56°F — about 1.3°F below the 30-year normal of 58°F. The hottest day reached 94°F in August; the coldest was 1°F in February. Total precipitation was 39 inches (drier than usual). Snowfall totaled 7 inches, below the 11-inch average. The wettest month was April.