Bismarck, IL 7-Day Weather Forecast
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Bismarck Weather Forecast


Bismarck, IL Weather Forecast Date: 807 PM CDT Tue Sep 29 2026
Weather forecast for Bismarck, IL
| Tonight Lo: 61°F Lo: 16°C |
Tonight... Mostly cloudy. Not as cool with lows in the lower 60s. South winds around 5 mph. |
| Wed Hi: 79°FHi: 26°C Lo: 69°F Lo: 21°C |
Wednesday... Mostly cloudy with a 20% chance of showers. Highs in the upper 70s. South winds 5 to 10 mph. |
| Thu Hi: 85°FHi: 29°C Lo: 65°F Lo: 18°C |
Thursday... Partly sunny in the morning, then mostly cloudy with a chance of showers in the afternoon. Highs in the mid 80s. Southwest winds 5 to 10 mph. Chance of rain 50%. |
| Fri Hi: 71°FHi: 22°C Lo: 49°F Lo: 9°C |
Friday... Showers likely in the morning, then partly sunny in the afternoon. Cooler with highs in the lower 70s. Chance of rain 70%. |
| Sat Hi: 69°FHi: 21°C Lo: 49°F Lo: 9°C |
Saturday... Partly cloudy. Lows in the upper 40s. Highs in the upper 60s. |
| Sat Hi: 69°FHi: 21°C Lo: 49°F Lo: 9°C |
Saturday... Partly cloudy. Lows in the upper 40s. Highs in the upper 60s. |
| Sun Hi: 69°FHi: 21°C Lo: 45°F Lo: 7°C |
Sunday... Mostly clear. Highs in the upper 60s. Lows in the mid 40s. |
| Mon Hi: 69°FHi: 21°C Lo: 45°F Lo: 7°C |
Monday... Mostly clear. Highs in the upper 60s. Lows in the mid 40s. |
| Tue Hi: 69°FHi: 21°C Lo: 45°F Lo: 7°C |
Tuesday... Mostly clear. Highs in the upper 60s. Lows in the mid 40s. |
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