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City of DeKalb, IllinoisDeKalb, IL 7-Day Weather Forecast
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DeKalb Weather Forecast
DeKalb, IL Weather Forecast Date: 641 PM CST Wed Nov 11 2026
Weather forecast for DeKalb, IL
Tonight Lo: 39°F Lo: 4°C |
Tonight... Partly cloudy in the evening, then becoming mostly cloudy. A slight chance of rain late in the evening. Lows in the upper 30s. Northwest winds 5 to 10 mph, increasing to north 10 to 15 mph with gusts up to 25 mph after midnight. Chance of precipitation 20%. |
Thu Hi: 41°FHi: 5°C Lo: 30°F Lo: -1°C |
Thursday... Partly cloudy. A slight chance of rain early in the afternoon. Breezy with highs in the lower 40s. North winds 15 to 20 mph with gusts up to 30 mph. Chance of precipitation 20%. |
Fri Hi: 41°FHi: 5°C Lo: 25°F Lo: -4°C |
Friday... Partly cloudy and breezy. Highs in the lower 40s. North winds 10 to 15 mph. Gusts up to 30 mph in the morning. |
Sat Hi: 45°FHi: 7°C Lo: 25°F Lo: -4°C |
Saturday... Mostly sunny. Highs in the mid 40s. |
| Sun Hi: 49°FHi: 9°C Lo: 29°F Lo: -2°C |
Sunday... Mostly sunny. Highs in the upper 40s. |
| Mon Hi: 49°FHi: 9°C Lo: 29°F Lo: -2°C |
Monday... Mostly sunny in the morning, then becoming partly cloudy. Highs in the upper 40s. |
| Tue Hi: 50°FHi: 10°C Lo: 29°F Lo: -2°C |
Tuesday... Mostly sunny. Highs around 50. |
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