Weather WorldDewey County, SD 7-Day Night Weather Forecast
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Dewey County, SD Weather Forecast
Dewey County, SD Weather Forecast Date: 521 AM MDT Wed Sep 30 2026
The area/counties/county of: Dewey, including the city of Isabel.or toggle through each period.
Today... Mostly sunny. Highs in the upper 70s. Northwest winds 5 to 10 mph. Gusts up to 25 mph this afternoon.
Tonight... Mostly cloudy. Lows around 50. North winds 10 to 15 mph with gusts up to 25 mph.
Thursday... Partly sunny in the morning, then becoming mostly cloudy. Much cooler with highs around 60. North winds 10 to 15 mph.
Thursday Night... Mostly cloudy with a 20% chance of showers. Lows in the mid 40s. North winds 5 to 10 mph, becoming east after midnight.
Friday... Partly sunny. Highs in the lower 60s. Southeast winds 15 to 20 mph with gusts up to 30 mph.
Friday Night... Partly cloudy. A 20% chance of showers. Lows in the upper 40s. Highs in the upper 60s.
Saturday... Partly cloudy. A 20% chance of showers. Lows in the upper 40s. Highs in the upper 60s.
Saturday Night... Mostly clear. Lows in the lower 40s. Highs in the lower 60s.
Sunday... Mostly clear. Lows in the lower 40s. Highs in the lower 60s.
Sunday Night... Mostly clear. Lows in the upper 40s. Highs in the upper 60s.
Monday... Mostly clear. Lows in the upper 40s. Highs in the upper 60s.
Monday Night... Partly cloudy. Lows in the lower 50s. Highs in the mid 70s.
POP = Probability of Precipitation
Dewey County Radar Loop
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