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Promise, SD Weather Forecast
Promise, SD Weather Forecast Date: 1112 AM MDT Tue Sep 15 2026
The area/counties/county of: Dewey, including the city of Isabel.or toggle through each period.
This Afternoon... Mostly sunny. Highs in the lower 70s. Northwest winds 10 to 15 mph.
Tonight... Partly cloudy. Lows in the lower 50s. East winds 10 to 15 mph. Gusts up to 30 mph after midnight.
Wednesday... Partly sunny. A slight chance of showers in the morning. Windy with highs in the mid 70s. Southeast winds 20 to 30 mph with gusts up to 40 mph. Chance of rain 20%.
Wednesday Night... Partly cloudy. Lows in the lower 50s. Southeast winds 10 to 15 mph with gusts up to 25 mph, becoming east 5 to 10 mph after midnight.
Thursday... Partly sunny in the morning, then mostly cloudy with a chance of showers in the afternoon. Highs in the lower 70s. East winds 10 to 15 mph with gusts up to 25 mph. Chance of rain 40%.
Thursday Night... Showers likely. Lows in the mid 50s. Chance of rain 70%.
Friday... Mostly cloudy. A chance of showers in the morning. Highs in the lower 70s. Chance of rain 40%.
Friday Night... Cloudy. A slight chance of showers after midnight. Lows in the mid 50s. Chance of rain 20%.
Saturday... Mostly cloudy with a 20% chance of showers. Highs around 70.
Saturday Night... Mostly cloudy with a 50% chance of showers. Lows in the lower 50s. Highs in the lower 70s.
Sunday... Mostly cloudy with a 50% chance of showers. Lows in the lower 50s. Highs in the lower 70s.
POP = Probability of Precipitation
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