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Defiance, IA Weather Forecast
Defiance, IA Weather Forecast Date: 1237 PM CDT Tue Sep 22 2026
The area/counties/county of: Shelby, including the city of Harlan.or toggle through each period.
This Afternoon... Cloudy. Near steady temperature in the upper 50s. East winds 5 to 10 mph.
Tonight... Cloudy. Lows in the lower 50s. East winds around 5 mph.
Wednesday... Mostly sunny. Highs in the mid 60s. Southeast winds 5 to 10 mph.
Wednesday Night... Partly cloudy in the evening, then mostly cloudy with a slight chance of showers after midnight. Lows in the mid 50s. Southeast winds around 5 mph. Chance of rain 20%.
Thursday... Showers likely, mainly in the morning. Highs in the mid 60s. Southeast winds 5 to 10 mph. Chance of rain 70%.
Thursday Night... Cloudy with a 50% chance of showers. Lows in the mid 50s.
Friday... A chance of thunderstorms. Showers likely. Highs in the mid 60s. Chance of rain 70%.
Friday Night... A chance of showers with a slight chance of thunderstorms in the evening, then showers with a chance of thunderstorms after midnight. Lows in the upper 50s. Chance of rain 80%.
Saturday... A slight chance of thunderstorms. Showers likely, mainly in the morning. Highs around 70. Chance of rain 60%.
Saturday Night... Mostly cloudy with a slight chance of showers and thunderstorms. Lows in the upper 50s. Chance of rain 20%.
Sunday... Mostly sunny. Highs in the mid 70s.
Sunday Night... Partly cloudy. Lows around 60.
POP = Probability of Precipitation
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