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Keystone, IN Weather Forecast
Keystone, IN Weather Forecast Date: 459 PM EDT Sat Sep 05 2026
The area/counties/county of: Wells, including the cities of: Bluffton and Ossian.or toggle through each period.
This Afternoon... Partly cloudy with a slight chance of showers and thunderstorms. Near steady temperature in the lower 80s. Northeast winds 5 to 10 mph. Chance of rain 20%.
Tonight... Partly cloudy with a slight chance of showers and thunderstorms in the evening, then mostly clear after midnight. Less humid with lows in the upper 50s. Northeast winds 5 to 10 mph. Chance of rain 20%.
Sunday... Mostly sunny. Highs in the upper 70s. Northeast winds around 5 mph.
Sunday Night... Mostly clear in the evening, then becoming partly cloudy. Lows in the mid 50s. Northeast winds around 5 mph.
Labor Day... Mostly sunny. Highs around 80. East winds 5 to 10 mph.
Monday Night... Mostly clear. Lows in the upper 50s.
Tuesday... Mostly sunny. Highs in the mid 80s.
Tuesday Night... Mostly clear. Lows in the upper 60s.
Wednesday... Mostly sunny. Highs in the upper 80s. Heat index values in the mid 90s in the afternoon.
Wednesday Night... Mostly clear. A slight chance of showers after midnight. Lows in the mid 60s. Chance of rain 20%.
Thursday... Partly cloudy with a 20% chance of showers. Highs in the upper 70s.
Thursday Night... Partly cloudy in the evening, then becoming mostly clear. Lows in the mid 50s.
POP = Probability of Precipitation
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