County Forecast for La Harpe , IL
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061200-
Hancock-
Including the city of Carthage
1106 PM CDT Wed Aug 5 2026

Rest of tonight   Cloudy with a chance of showers and thunderstorms. Patchy fog. Near steady temperature in the upper 60s. Northeast winds around 5 mph. Chance of rain 50 percent.
Thursday   Patchy fog in the morning. Cloudy with a chance of showers and thunderstorms in the morning, then partly sunny with a slight chance of showers and thunderstorms in the afternoon. Humid with highs in the lower 80s. South winds around 5 mph. Chance of rain 50 percent.
Thursday night   Partly cloudy in the evening, then becoming mostly cloudy. Humid with lows in the upper 60s. Southeast winds around 5 mph.
Friday   Partly sunny. A chance of showers and thunderstorms in the afternoon. Humid with highs in the mid 80s. Southwest winds 5 to 10 mph. Chance of rain 40 percent.
Friday night   Mostly clear with a chance of showers and thunderstorms in the evening, then partly cloudy after midnight. Humid with lows in the upper 60s. Southwest winds around 5 mph. Chance of rain 40 percent.
Saturday   Sunny. Highs in the mid 80s.
Saturday night   Mostly clear. A chance of showers and thunderstorms after midnight. Lows around 70. Chance of rain 30 percent.
Sunday   Mostly sunny. Highs in the upper 80s. Heat index values up to 100 in the afternoon.
Sunday night   Partly cloudy. A chance of showers and thunderstorms after midnight. Lows in the lower 70s. Chance of rain 30 percent. Heat index values up to 100 early in the evening.
Monday   Mostly sunny. Highs in the upper 80s. Heat index values up to 100 in the afternoon.
Monday night   Partly cloudy. A chance of showers and thunderstorms after midnight. Lows in the lower 70s. Chance of rain 40 percent. Heat index values up to 100 early in the evening.
Tuesday   A chance of showers in the morning. Partly sunny. Highs in the mid 80s. Chance of rain 40 percent.
Tuesday night and wednesday   Mostly cloudy. A chance of showers. Lows in the upper 60s. Highs in the lower 80s. Chance of rain 50 percent.
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Bryce Anderson – DTN Meteorologist
Potential for Heavy Rain in Missouri and Illinois

Heavy rain of 3-4 inches targets east-central Missouri and west-central Illinois through Thursday morning. » More DTN Weather Commentary

Posted at 12:20PM Wed Aug 5, 2026 CDT
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