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Simmon Lake, SD Weather Forecast
Simmon Lake, SD Weather Forecast Date: 1036 PM CDT Wed Aug 19 2026
The area/counties/county of: Marshall, including the city of Britton.or toggle through each period.
Rest of Tonight... Partly cloudy. A slight chance of thunderstorms. Near steady temperature in the mid 60s. South winds 5 to 10 mph, increasing to 15 to 20 mph with gusts up to 30 mph. Chance of rain 20%.
Thursday... Partly sunny. Highs in the lower 80s. Southwest winds 15 to 20 mph, becoming northwest in the afternoon.
Thursday Night... Mostly clear. Lows in the upper 50s. Northwest winds 10 to 15 mph with gusts up to 30 mph, becoming north around 5 mph after midnight.
Friday... Mostly sunny. Highs in the lower 80s. North winds 5 to 10 mph.
Friday Night... Mostly clear. Lows in the upper 50s. North winds 5 to 10 mph.
Saturday... Mostly sunny. Highs in the upper 70s.
Saturday Night... Mostly clear in the evening, then becoming mostly cloudy. Lows in the upper 50s.
Sunday... Mostly cloudy in the morning, then becoming partly sunny. Highs in the upper 70s.
Sunday Night... Partly cloudy. A slight chance of showers in the evening, then a chance of showers with a slight chance of thunderstorms after midnight. Lows in the lower 60s. Chance of rain 40%.
Monday... Partly sunny. A slight chance of showers in the morning. Highs in the lower 80s. Chance of rain 20%.
Monday Night... Mostly clear with a chance of thunderstorms in the evening, then partly cloudy after midnight. Lows in the lower 60s. Chance of rain 30%.
Tuesday... Partly sunny. Highs in the lower 80s.
Tuesday Night... Mostly clear. Lows in the lower 60s.
POP = Probability of Precipitation
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