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Summit, SD Weather Forecast
Summit, SD Weather Forecast Date: 1047 AM CDT Mon Sep 21 2026
The area/counties/county of: Roberts, including the city of Sisseton.or toggle through each period.
Rest of Today... Partly sunny. Highs around 60. East winds 5 to 10 mph.
Tonight... Partly cloudy in the evening, then becoming mostly cloudy. Lows in the mid 40s. Temperature rising to around 50 after midnight. Southeast winds around 5 mph.
Tuesday... Partly sunny. Highs in the lower 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 with gusts up to 25 mph.
Wednesday... Partly sunny. A slight chance of showers in the afternoon. Highs in the mid 60s. Southeast winds 15 to 20 mph with gusts up to 30 mph. Chance of rain 20%.
Wednesday Night... A slight chance of thunderstorms in the evening. Showers. Lows in the lower 50s. Chance of rain 90%.
Thursday... Mostly cloudy. A slight chance of showers in the morning. Highs in the upper 60s. Chance of rain 20%.
Thursday Night... Mostly cloudy. Lows in the lower 50s.
Friday... Mostly cloudy with a 20% chance of showers. Highs in the upper 60s.
Friday Night... Mostly cloudy with a 50% chance of showers. Lows in the mid 50s. Highs in the upper 60s.
Saturday... Mostly cloudy with a 50% chance of showers. Lows in the mid 50s. Highs in the upper 60s.
Saturday Night... Mostly cloudy in the evening, then becoming partly cloudy. A 20% chance of showers. Lows in the mid 50s.
POP = Probability of Precipitation
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