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Collison, IL 7-Day Weather Forecast
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Collison Weather Forecast
Collison, IL Weather Forecast Date: 637 PM CDT Fri Sep 04 2026
Weather forecast for Collison, IL
Tonight Lo: 71°F Lo: 22°C |
Tonight... Mostly clear this evening, then partly cloudy with a slight chance of showers and thunderstorms after midnight. Lows in the lower 70s. Southwest winds around 5 mph. Chance of rain 20%. |
Sat Hi: 91°FHi: 33°C Lo: 65°F Lo: 18°C |
Saturday... Sunny with highs in the lower 90s. Northwest winds 5 to 10 mph. Heat index values up to 102. |
| Sun Hi: 81°FHi: 27°C Lo: 60°F Lo: 16°C |
Sunday... Sunny. Highs in the lower 80s. Northeast winds 5 to 10 mph. |
| Labor Day Hi: 85°FHi: 29°C Lo: 61°F Lo: 16°C |
Labor Day... Sunny. Highs in the mid 80s. |
Tue Hi: 90°FHi: 32°C Lo: 71°F Lo: 22°C |
Tuesday... Partly cloudy. Lows in the lower 60s. Highs around 90. |
| Wed Hi: 95°FHi: 35°C Lo: 69°F Lo: 21°C |
Wednesday... Mostly sunny. Highs in the mid 90s. Heat index values up to 100. |
| Thu Hi: 85°FHi: 29°C Lo: 61°F Lo: 16°C |
Thursday... Partly cloudy. Highs in the mid 80s. Lows in the lower 60s. |
| Fri Hi: 85°FHi: 29°C Lo: 61°F Lo: 16°C |
Friday... Partly cloudy. Highs in the mid 80s. Lows in the lower 60s. |
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