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Flat Lake, SD 7-Day Night Weather Forecast
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Flat Lake, SD Weather Forecast
Flat Lake, SD Weather Forecast Date: 637 PM CDT Wed Aug 12 2026
The area/counties/county of: Marshall, including the city of Britton.or toggle through each period.
Tonight... Thunderstorms likely. Lows in the lower 60s. Northeast winds 5 to 10 mph. Chance of rain 70%.
Thursday... Mostly cloudy with a slight chance of showers in the morning, then partly sunny in the afternoon. Humid with highs in the upper 70s. East winds 5 to 10 mph with gusts up to 25 mph. Chance of rain 20%.
Thursday Night... Mostly cloudy. Lows around 60. East winds around 10 mph with gusts up to 20 mph.
Friday... Partly sunny. Highs in the mid 70s. East winds 10 to 15 mph with gusts up to 30 mph.
Friday Night... A chance of showers in the evening. Mostly cloudy with a slight chance of thunderstorms. Humid with lows in the lower 60s. South winds 10 to 15 mph with gusts up to 25 mph. Chance of rain 40%.
Saturday... Mostly cloudy with a slight chance of showers in the morning, then partly sunny with a chance of showers with a slight chance of thunderstorms in the afternoon. Highs in the upper 70s. Chance of rain 40%.
Saturday Night... Mostly cloudy. A slight chance of thunderstorms in the evening. Lows in the upper 50s. Chance of rain 20%.
Sunday... Partly sunny. Highs in the mid 70s.
Sunday Night... Mostly clear in the evening, then becoming partly cloudy. Lows in the mid 50s.
Monday... Partly sunny. Highs in the upper 70s.
Monday Night... Mostly clear in the evening, then becoming partly cloudy. A slight chance of thunderstorms in the evening. A chance of showers. Lows around 60. Chance of rain 40%.
Tuesday... Mostly cloudy with a slight chance of showers in the morning, then partly sunny with a slight chance of thunderstorms in the afternoon. Highs in the upper 70s. Chance of rain 20%.
Tuesday Night... Partly cloudy. A chance of showers with a slight chance of thunderstorms in the evening, then a slight chance of showers after midnight. Lows in the upper 50s. Chance of rain 40%.
POP = Probability of Precipitation
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