Weather WorldSummit Lake, SD 7-Day Night Weather Forecast
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Summit Lake, SD Weather Forecast
Summit Lake, SD Weather Forecast Date: 206 PM CDT Fri Aug 21 2026
The area/counties/county of: Grant, including the city of Milbank.or toggle through each period.
This Afternoon... Partly sunny. Near steady temperature in the upper 70s. North winds 5 to 10 mph with gusts up to 20 mph.
Tonight... Mostly clear. Lows in the upper 50s. Northwest winds 5 to 10 mph.
Saturday... Sunny. Highs in the upper 70s. North winds 5 to 10 mph.
Saturday Night... Mostly clear in the evening, then becoming partly cloudy. Lows in the mid 50s. North winds around 5 mph, becoming southwest after midnight.
Sunday... Partly sunny. Highs in the upper 70s. South winds 5 to 10 mph.
Sunday Night... Mostly 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 50%.
Monday... Mostly cloudy in the morning, then becoming partly sunny. Highs around 80.
Monday Night... Partly cloudy with a 20% chance of thunderstorms. Lows in the mid 60s.
Tuesday... Partly sunny. Highs in the lower 80s.
Tuesday Night... Mostly clear. Lows around 60. Highs around 80.
Wednesday... Mostly clear. Lows around 60. Highs around 80.
POP = Probability of Precipitation
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