Weather WorldSummit Reservoir, SD 7-Day Night Weather Forecast
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Summit Reservoir, SD Weather Forecast
Summit Reservoir, SD Weather Forecast Date: 922 AM CDT Sun Oct 18 2026
The area/counties/county of: Lyman, including the city of Kennebec.or toggle through each period.
Rest of Today... Sunny. Highs in the upper 60s. Northwest winds 5 to 10 mph, becoming northeast 10 to 15 mph this afternoon.
Tonight... Mostly clear in the evening, then becoming partly cloudy. Lows in the lower 40s. Northeast winds 10 to 15 mph with gusts up to 25 mph.
Monday... Mostly sunny. Highs in the lower 60s. East winds 5 to 10 mph.
Monday Night... Mostly clear. Lows around 40. Southeast winds 5 to 10 mph.
Tuesday... Mostly sunny. Highs around 70. Southeast winds 15 to 20 mph with gusts up to 30 mph.
Tuesday Night... Mostly clear. Lows in the upper 40s. Highs in the lower 70s.
Wednesday... Mostly clear. Lows in the upper 40s. Highs in the lower 70s.
Thursday... Partly sunny. Highs around 80.
Thursday Night... Partly cloudy in the evening, then mostly cloudy with a slight chance of thunderstorms after midnight. Not as cool with lows in the upper 50s. Chance of rain 20%.
Friday... Mostly cloudy in the morning, then becoming partly sunny. A 20% chance of showers. Windy with highs in the lower 80s.
Friday Night... Mostly cloudy. A chance of showers in the evening, then showers likely after midnight. Breezy with lows in the lower 50s. Chance of rain 60%.
POP = Probability of Precipitation
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