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Mount Olive, IL Weather Forecast
Mount Olive, IL Weather Forecast Date: 127 AM CDT Mon Sep 14 2026
The area/counties/county of: Greene County Il, Jersey County Il.or toggle through each period.
Rest of Tonight... Mostly cloudy. Near steady temperature in the lower 60s. Northeast winds 5 to 10 mph with gusts up to 20 mph.
Monday... Mostly sunny. Highs in the upper 80s. Southeast winds 10 to 15 mph.
Monday Night... Mostly clear. Not as cool with lows around 70. Southeast winds 10 to 15 mph with gusts up to 25 mph.
Tuesday... Sunny. A chance of showers and thunderstorms in the afternoon. Hot with highs in the mid 90s. South winds around 10 mph with gusts up to 20 mph, becoming southwest in the afternoon. Chance of rain 50%. Heat index values up to 105 in the afternoon.
Tuesday Night... Showers likely with a chance of thunderstorms in the evening, then mostly cloudy with a chance of showers with a slight chance of thunderstorms after midnight. Lows in the upper 60s. East winds around 5 mph. Chance of rain 60%.
Wednesday... Mostly sunny with a slight chance of thunderstorms. A chance of showers, mainly in the morning. Highs in the mid 90s. Chance of rain 50%. Heat index values up to 100 in the afternoon.
Wednesday Night... Partly cloudy. A slight chance of showers and thunderstorms. Lows in the lower 70s. Highs in the lower 90s. Chance of rain 20%. Heat index values up to 100.
Thursday... Partly cloudy. A slight chance of showers and thunderstorms. Lows in the lower 70s. Highs in the lower 90s. Chance of rain 20%. Heat index values up to 100.
Thursday Night... Partly cloudy. Lows around 70.
Friday... Mostly sunny. A slight chance of showers and thunderstorms in the afternoon. Highs in the lower 90s. Chance of rain 20%.
Friday Night... Partly cloudy. A slight chance of showers in the evening. Lows in the upper 60s. Chance of rain 20%.
Saturday... Mostly sunny. A slight chance of showers and thunderstorms in the afternoon. Highs in the upper 80s. Chance of rain 20%.
Saturday Night... Partly cloudy. A slight chance of showers in the evening, then a chance of showers with a slight chance of thunderstorms after midnight. Lows in the mid 60s. Chance of rain 30%.
POP = Probability of Precipitation
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