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Summum Weather Forecast
Summum, IL Weather Forecast Date: 337 PM CDT Mon Sep 21 2026
Weather forecast for Summum, IL
Tonight Lo: 59°F Lo: 15°C |
Tonight... Mostly cloudy. A chance of sprinkles this evening, then a chance of showers after midnight. Lows in the upper 50s. Northeast winds 5 to 10 mph with gusts up to 20 mph. Chance of rain 30%. |
Tue Hi: 65°FHi: 18°C Lo: 51°F Lo: 11°C |
Tuesday... Mostly cloudy with a chance of showers in the morning, then partly sunny with a chance of sprinkles in the afternoon. Highs in the mid 60s. Northeast winds 5 to 10 mph with gusts up to 20 mph. Chance of rain 30%. |
Wed Hi: 69°FHi: 21°C Lo: 51°F Lo: 11°C |
Wednesday... Mostly sunny. Highs in the upper 60s. Northeast winds 5 to 10 mph. |
Thu Hi: 70°FHi: 21°C Lo: 51°F Lo: 11°C |
Thursday... Mostly cloudy. Highs around 70. Lows in the lower 50s. |
| Fri Hi: 70°FHi: 21°C Lo: 51°F Lo: 11°C |
Friday... Mostly cloudy. Highs around 70. Lows in the lower 50s. |
| Sat Hi: 70°FHi: 21°C Lo: 51°F Lo: 11°C |
Saturday... Mostly cloudy. Highs around 70. Lows in the lower 50s. |
| Sat Hi: 70°FHi: 21°C Lo: 55°F Lo: 13°C |
Saturday... Mostly cloudy. Highs around 70. Lows in the lower 50s. |
| Sun Hi: 75°FHi: 24°C Lo: 55°F Lo: 13°C |
Sunday... Partly sunny. Highs in the mid 70s. |
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