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Johnson Park, IL Weather Forecast
Johnson Park, IL Weather Forecast Date: 237 AM CDT Thu Sep 17 2026
The area/counties/county of: Adams County Il, including the cities of: Quincy, Mount Sterling, Pittsfield, Hannibal, and Bowling Green.or toggle through each period.
Today... Sunny. Highs in the lower 90s. Southwest winds 5 to 10 mph with gusts up to 20 mph, becoming west this afternoon. Heat index values up to 103.
Tonight... Mostly clear in the evening, then becoming partly cloudy. Humid with lows around 70. Northeast winds around 5 mph. Heat index values up to 100 early in the evening.
Friday... Mostly sunny with a slight chance of showers and thunderstorms. Humid with highs in the upper 80s. East winds 5 to 10 mph, becoming south in the afternoon. Chance of rain 20%. Heat index values up to 100 in the afternoon.
Friday Night... Partly cloudy. Lows in the lower 70s. South winds around 5 mph.
Saturday... Partly sunny. Highs in the lower 90s. Southwest winds 5 to 10 mph with gusts up to 20 mph.
Saturday Night... Partly cloudy with a chance of showers and thunderstorms in the evening, then mostly cloudy with showers likely with a slight chance of thunderstorms after midnight. Lows in the upper 60s. Chance of rain 60%.
Sunday... Mostly cloudy in the morning, then becoming partly sunny. A chance of showers. A slight chance of thunderstorms in the morning, then a chance of thunderstorms in the afternoon. Cooler with highs in the lower 80s. Chance of rain 50%.
Sunday Night... Mostly cloudy. A chance of showers and thunderstorms in the evening, then showers likely with a slight chance of thunderstorms after midnight. Lows in the lower 60s. Chance of rain 70%.
Monday... A slight chance of thunderstorms. Showers likely, mainly in the morning. Highs in the lower 70s. Chance of rain 70%.
Monday Night... Mostly cloudy. A slight chance of showers in the evening, then a chance of showers after midnight. Lows in the upper 50s. Chance of rain 40%.
Tuesday... Partly sunny. A slight chance of showers in the morning. Highs in the lower 70s. Chance of rain 20%.
Tuesday Night... Partly cloudy. Lows in the upper 50s. Highs in the mid 70s.
POP = Probability of Precipitation
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