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Monticello, IL 7-Day Weather Forecast
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Monticello Weather Forecast
Monticello, IL Weather Forecast Date: 1152 PM CDT Wed Oct 14 2026
Weather forecast for Monticello, IL
Tonight Lo: 60°F Lo: 16°C |
Tonight... Mostly cloudy. A slight chance of showers. Near steady temperature in the lower 60s. Northeast winds 5 to 10 mph. Chance of rain 20%. |
Thu Hi: 75°FHi: 24°C Lo: 49°F Lo: 9°C |
Thursday... Mostly cloudy. A chance of showers with a slight chance of thunderstorms in the morning, then showers with a chance of thunderstorms in the afternoon. Highs in the mid 70s. East winds 5 to 10 mph, becoming south 10 to 15 mph in the afternoon. Chance of rain 90%. |
Fri Hi: 59°FHi: 15°C Lo: 39°F Lo: 4°C |
Friday... Partly sunny. A chance of showers in the afternoon. Breezy and much cooler. Less humid with highs in the upper 50s. Northwest winds 20 to 25 mph with gusts up to 35 mph. Chance of rain 40%. |
Sat Hi: 60°FHi: 16°C Lo: 35°F Lo: 2°C |
Saturday... Sunny. Highs around 60. |
| Sun Hi: 69°FHi: 21°C Lo: 41°F Lo: 5°C |
Sunday... Areas of frost in the morning. Sunny. Highs in the upper 60s. |
Mon Hi: 71°FHi: 22°C Lo: 41°F Lo: 5°C |
Monday... Partly cloudy. Highs in the lower 70s. Lows in the lower 40s. |
| Tue Hi: 75°FHi: 24°C Lo: 49°F Lo: 9°C |
Tuesday... Mostly clear. Highs in the mid 70s. Lows in the upper 40s. |
| Wed Hi: 75°FHi: 24°C Lo: 49°F Lo: 9°C |
Wednesday... Mostly clear. Highs in the mid 70s. Lows in the upper 40s. |
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