| NWS Forecast for: Dewey County Issued by: National Weather Service Aberdeen, SD Last Update: 837 PM MDT Sat Aug 15 2026 | |
| Tonight: Partly cloudy. Lows in the upper 50s. North winds 10 to 15 mph, diminishing to around 5 mph after midnight. Sunday: Mostly sunny. Highs in the lower 80s. Northeast winds around 5 mph, becoming east in the afternoon. Sunday Night: Partly cloudy in the evening, then clearing. A 20 percent chance of thunderstorms. Lows in the upper 50s. Southeast winds 5 to 10 mph. Monday: Mostly sunny. Highs in the mid 80s. Southwest winds around 5 mph, becoming northwest with gusts up to 20 mph in the afternoon. Monday Night: Partly cloudy with a slight chance of thunderstorms in the evening, then mostly cloudy with a chance of showers after midnight. Lows in the upper 50s. North winds 5 to 10 mph with gusts up to 20 mph, becoming northeast after midnight. Chance of rain 50 percent. Tuesday: Showers likely in the morning, then partly sunny with a chance of thunderstorms in the afternoon. Highs in the upper 70s. Chance of rain 60 percent. Tuesday Night: Mostly cloudy with a chance of thunderstorms in the evening, then partly cloudy with a slight chance of showers after midnight. Lows in the mid 50s. Chance of rain 50 percent. Wednesday: Partly sunny. A slight chance of thunderstorms in the afternoon. Highs in the upper 70s. Chance of rain 20 percent. Wednesday Night: Partly cloudy. A chance of thunderstorms in the evening, then a slight chance of showers after midnight. Lows in the mid 50s. Chance of rain 40 percent. Thursday: Partly sunny with a 20 percent chance of showers. Highs in the lower 80s. Thursday Night: Mostly clear. A slight chance of thunderstorms in the evening. Lows in the upper 50s. Chance of rain 20 percent. Friday Through Saturday: Mostly clear. Highs in the mid 80s. Lows in the upper 50s. | |
| Zone Forecast: Dewey County | |
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