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City of Johnston, IAJohnston, IA 7-Day Night Weather Forecast
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Johnston, IA Weather Forecast
Johnston, IA Weather Forecast Date: 1233 PM CDT Wed Sep 16 2026
The area/counties/county of: Polk, including the city of Des Moines.or toggle through each period.
This Afternoon... Cloudy with a chance of showers with a slight chance of thunderstorms. Near steady temperature in the mid 60s. East winds 5 to 10 mph. Chance of rain 50%.
Tonight... Cloudy with a chance of thunderstorms. A chance of showers in the evening, then showers likely after midnight. Patchy fog after midnight. Humid with lows in the mid 60s. Southeast winds around 5 mph. Chance of rain 70%.
Thursday... Cloudy. A chance of showers and thunderstorms in the morning. Patchy fog in the morning. Humid with highs in the upper 70s. West winds around 5 mph, becoming northeast around 5 mph in the afternoon. Chance of rain 50%.
Thursday Night... Mostly cloudy. A chance of showers and thunderstorms after midnight. Humid with lows in the mid 60s. East winds 5 to 10 mph. Chance of rain 50%.
Friday... Mostly cloudy with a chance of showers and thunderstorms in the morning, then mostly sunny with a slight chance of showers and thunderstorms in the afternoon. Humid with highs in the lower 80s. Southeast winds 10 to 15 mph. Chance of rain 50%.
Friday Night... A chance of thunderstorms. Showers. Lows in the upper 60s. Chance of rain 90%.
Saturday... Mostly cloudy with a chance of showers. A chance of thunderstorms, mainly in the morning. Highs in the lower 80s. Chance of rain 50%.
Saturday Night... Mostly cloudy with a chance of thunderstorms. A chance of showers. Lows in the lower 60s. Chance of rain 50%.
Sunday... Showers likely. A chance of thunderstorms, mainly in the morning. Highs in the lower 70s. Chance of rain 60%.
Sunday Night... Mostly cloudy. A chance of showers with a slight chance of thunderstorms in the evening, then a chance of showers after midnight. Lows in the upper 50s. Chance of rain 50%.
Monday... Mostly cloudy. A chance of showers, mainly in the morning. Highs around 70. Chance of rain 30%.
Monday Night... Mostly cloudy in the evening, then becoming partly cloudy. A 20% chance of showers. Lows in the upper 50s.
POP = Probability of Precipitation
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