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Weather in Mascoutah, IL · National Weather Service + NOAA

Mascoutah has some of Illinois’s warmest summers

Mascoutah has chilly winters and warm summers. A typical July afternoon reaches 89°, a January night drops to 23°, and about 11 inches of snow falls in a normal winter. In November, a normal day reaches 56° and a normal night drops to 36°.

Winter 43°/26°Spring 67°/45°Summer 87°/66°Fall 69°/47°
Right now
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Sunrise 7:28 am · sunset 5:57 pm

Getting the latest forecast from the National Weather Service…

What stands out about Mascoutah’s weather

Read from 30 years of NOAA records. Each one opens the full story on the Climate page.

Climate →
Warmer summers than most of IllinoisJuly afternoons average 89°, warmer than 2,834 of 2,886 Illinois towns.Milder winters than most of IllinoisJanuary nights average 23°, milder than 2,565 of 2,886 Illinois towns.The coldest spot aroundColder January nights than all 4 towns around it.Plenty of 90° daysAbout 53 days a year reach 90°.
A normal year

Where today sits in Mascoutah’s year

Typical highs and lows month by month, from 30 years of NOAA records.

Full climate →
Winter
43° / 26°
5 days with an inch or more of snow
Spring
67° / 45°
Last frost around Apr 12
Summer
87° / 66°
53 days reach 90° in a normal year
Fall now
69° / 47°
First frost around Oct 20
Pastthe usual first frost (Oct 20). Last frost next spring: Apr 12
Best months to be outside
AprMaySepOct
Highs of 62–84° and lows of 40° or more
How much snow does Mascoutah get?About 11 inches a winter.When is it wettest?May, with 5.0 inches.Is it warmer than it used to be?+1.2° vs. the 20th century.

Weather talk

Road reports, first frosts and storm memories from neighbors in Mascoutah.

Town Square →
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TT Weaver · Sep 25

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Forecast, conditions and alerts: National Weather Service. Climate: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000. Temperatures and rainfall come from NOAA’s gridded normals for Mascoutah itself (about a 3-mile square). Snow, frost dates and day counts: the NOAA station at Belleville Siu Rsch, IL (3 mi). Sunrise and sunset are calculated from the town’s position. Normals are 30-year averages, not a forecast.