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Summit, SD Weather Forecast
Summit, SD Weather Forecast Date: 421 AM CDT Mon Sep 21 2026
The area/counties/county of: Roberts, including the city of Sisseton.or toggle through each period.
Today... Patchy fog this morning. Mostly cloudy with a slight chance of showers this morning, then partly sunny this afternoon. Highs around 60. East winds 5 to 10 mph. Chance of rain 20%.
Tonight... Partly cloudy. Patchy fog in the evening, then areas of fog after midnight. Lows in the lower 40s. Southeast winds around 5 mph.
Tuesday... Patchy fog in the morning. Partly sunny. Highs in the mid 60s. Southeast winds 10 to 15 mph with gusts up to 25 mph.
Tuesday Night... Partly cloudy. Lows in the mid 40s. Southeast winds 10 to 15 mph.
Wednesday... Partly sunny. Highs in the upper 60s. Southeast winds 15 to 20 mph with gusts up to 30 mph.
Wednesday Night... A chance of thunderstorms. Showers. Lows in the lower 50s. Chance of rain 80%.
Thursday... Mostly cloudy. A slight chance of showers in the morning. Highs around 70. Chance of rain 20%.
Thursday Night... Mostly cloudy. Lows in the lower 50s.
Friday... Cloudy in the morning, then becoming partly sunny. A 20% chance of showers. Highs in the lower 70s.
Friday Night... Mostly cloudy. A slight chance of showers in the evening, then a chance of showers after midnight. Lows in the mid 50s. Chance of rain 40%.
Saturday... Mostly cloudy with a 20% chance of showers. Highs in the mid 60s.
Saturday Night... Mostly cloudy. A chance of showers, mainly in the evening. Lows in the lower 50s. Chance of rain 30%.
POP = Probability of Precipitation
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