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City of Mascoutah, ILMascoutah, IL 7-Day Weather Forecast
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Mascoutah Weather Forecast
Mascoutah, IL Weather Forecast Date: 1048 PM CDT Wed Sep 16 2026
Weather forecast for Mascoutah, IL
Tonight Lo: 75°F Lo: 24°C |
Tonight... Mostly cloudy late this evening, then clearing. Near steady temperature in the mid 70s. South winds around 5 mph. |
Thu Hi: 99°FHi: 37°C Lo: 71°F Lo: 22°C |
Thursday... Sunny. A slight chance of showers and thunderstorms in the afternoon. Hot with highs in the upper 90s. Southwest winds 5 to 10 mph. Chance of rain 20%. Heat index values up to 108 in the afternoon. |
Fri Hi: 95°FHi: 35°C Lo: 71°F Lo: 22°C |
Friday... Sunny, hot with highs in the mid 90s. East winds around 5 mph, becoming south in the afternoon. Heat index values up to 105 in the afternoon. |
| Sat Hi: 99°FHi: 37°C Lo: 71°F Lo: 22°C |
Saturday... Mostly sunny. Hot with highs in the upper 90s. |
| Sun Hi: 91°FHi: 33°C Lo: 69°F Lo: 21°C |
Sunday... Partly cloudy. A chance of showers with a slight chance of thunderstorms. Lows in the lower 70s. Highs in the lower 90s. Chance of rain 40%. |
| Mon Hi: 89°FHi: 32°C Lo: 65°F Lo: 18°C |
Monday... Partly sunny. A slight chance of showers in the morning, then a chance of showers with a slight chance of thunderstorms in the afternoon. Highs in the upper 80s. Chance of rain 40%. |
Tue Hi: 81°FHi: 27°C Lo: 61°F Lo: 16°C |
Tuesday... Partly cloudy with a 20% chance of showers. Highs in the lower 80s. Lows in the lower 60s. |
| Wed Hi: 81°FHi: 27°C Lo: 61°F Lo: 16°C |
Wednesday... Partly cloudy with a 20% chance of showers. Highs in the lower 80s. Lows in the lower 60s. |
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