Weather WorldDewey, SD 7-Day Weather Forecast
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Dewey Weather Forecast
Dewey, SD Weather Forecast Date: 1242 PM MDT Fri Sep 18 2026
Weather forecast for Dewey, SD
Today Hi: 79°FHi: 26°C Lo: 59°F Lo: 15°C |
This Afternoon... Partly cloudy. Highs in the upper 70s. South winds 5 to 10 mph with gusts up to 20 mph. |
Sat Hi: 65°FHi: 18°C Lo: 51°F Lo: 11°C |
Saturday... Patchy fog in the morning. Showers likely. A slight chance of thunderstorms in the morning, then a chance of thunderstorms in the afternoon. Highs in the mid 60s. East winds 5 to 10 mph. Gusts up to 20 mph in the afternoon. Chance of rain 70%. |
| Sun Hi: 59°FHi: 15°C Lo: 50°F Lo: 10°C |
Sunday... Showers. A slight chance of thunderstorms in the morning, then a chance of thunderstorms in the afternoon. Highs in the upper 50s. East winds 5 to 10 mph. Gusts up to 20 mph in the afternoon. |
Mon Hi: 61°FHi: 16°C Lo: 50°F Lo: 10°C |
Monday... Becoming partly cloudy. A 50% chance of showers. Highs in the lower 60s. |
| Tue Hi: 69°FHi: 21°C Lo: 55°F Lo: 13°C |
Tuesday... Mostly cloudy in the morning, then partly cloudy with a slight chance of showers in the afternoon. Highs in the upper 60s. Chance of rain 20%. |
| Wed Hi: 75°FHi: 24°C Lo: 55°F Lo: 13°C |
Wednesday... Partly cloudy. A slight chance of showers and thunderstorms in the afternoon. Highs in the mid 70s. Chance of rain 20%. |
| Thu Hi: 75°FHi: 24°C |
Thursday... Partly cloudy in the morning, then clearing. Highs in the mid 70s. |
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