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County Forecast for Monticello , IL |
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Piatt-
Including the city of Monticello
737 AM CDT Thu Jul 16 2026
Rest of today Patchy fog this morning. Mostly sunny. Highs around 90. Light and variable winds, becoming south around 5 mph this afternoon. Heat index values up to 100.
Tonight Partly cloudy. A slight chance of showers and thunderstorms after midnight. Humid with lows in the lower 70s. Southwest winds around 5 mph. Chance of rain 20 percent.
Friday Partly sunny with a chance of thunderstorms. A chance of showers in the morning, then showers likely in the afternoon. Humid with highs in the upper 80s. West winds 5 to 10 mph. Chance of rain 60 percent.
Friday night Partly cloudy with a chance of showers and thunderstorms in the evening, then mostly clear after midnight. Humid with lows in the lower 70s. Southwest winds 5 to 10 mph. Chance of rain 50 percent.
Saturday Sunny. A chance of showers and thunderstorms in the afternoon. Humid with highs around 90. West winds 10 to 15 mph with gusts up to 25 mph. Chance of rain 40 percent. Heat index values up to 103.
Saturday night Mostly clear. A chance of showers and thunderstorms in the evening. Lows in the upper 60s. Chance of rain 40 percent.
Sunday and sunday night Mostly clear. Highs in the mid 80s. Lows in the mid 60s.
Monday Mostly sunny. Highs in the upper 80s.
Monday night Partly cloudy. A chance of showers after midnight. Lows around 70. Chance of rain 40 percent.
Tuesday Mostly sunny. Highs in the mid 80s.
Tuesday night Mostly clear in the evening, then becoming partly cloudy. Lows in the mid 60s.
Wednesday Mostly sunny. Highs in the lower 80s. |
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DTN Weather Summary
