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Decatur, IN Weather Forecast
Decatur, IN Weather Forecast Date: 343 PM EDT Sun Sep 20 2026
The area/counties/county of: Adams, including the cities of: Decatur and Berne.or toggle through each period.
This Afternoon... Showers likely with a chance of thunderstorms. Some thunderstorms May produce heavy rainfall. Near steady temperature in the lower 70s. Northeast winds 5 to 10 mph with gusts up to 20 mph. Chance of rain 70%.
Tonight... Showers. A chance of thunderstorms, mainly in the evening. Some thunderstorms May produce heavy rainfall in the evening. Some thunderstorms May produce heavy rainfall after midnight. Lows in the mid 50s. Northeast winds 10 to 15 mph with gusts up to 25 mph. Chance of rain 90%.
Monday... Cloudy with a 50% chance of showers. Cooler with highs in the lower 60s. Northeast winds 10 to 15 mph with gusts up to 25 mph.
Monday Night... Mostly cloudy. A slight chance of showers in the evening. Lows in the lower 50s. Northeast winds 10 to 15 mph with gusts up to 25 mph. Chance of rain 20%.
Tuesday... Mostly cloudy. Highs in the mid 60s. Northeast winds 10 to 15 mph with gusts up to 25 mph.
Tuesday Night... Mostly cloudy. A slight chance of showers in the evening. Lows in the lower 50s. Chance of rain 20%.
Wednesday... Mostly cloudy with a 20% chance of showers. Highs in the mid 60s.
Wednesday Night... Mostly cloudy. A slight chance of showers in the evening. Lows in the lower 50s. Chance of rain 20%.
Thursday... Mostly cloudy. Highs in the mid 60s.
Thursday Night... Partly cloudy. Lows in the upper 40s.
Friday... Partly cloudy. Highs in the upper 60s.
Friday Night... Mostly clear. Lows in the mid 40s.
POP = Probability of Precipitation
Decatur Radar Loop
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