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Summit Lake, SD Weather Forecast
Summit Lake, SD Weather Forecast Date: 922 PM CDT Fri Oct 09 2026
The area/counties/county of: Grant, including the city of Milbank.or toggle through each period.
Tonight... Mostly clear and breezy. Not as cool with lows in the lower 60s. Temperature rising into the upper 60s after midnight. Southeast winds 10 to 15 mph with gusts up to 25 mph, increasing to south 20 to 25 mph with gusts up to 40 mph after midnight.
Saturday... Sunny. Patchy blowing dust. Windy, warmer with highs in the upper 80s. South winds 20 to 30 mph with gusts up to 45 mph.
Saturday Night... Mostly clear. Lows in the lower 60s. South winds 15 to 20 mph. Gusts up to 40 mph in the evening.
Sunday... Partly sunny. Not as warm with highs in the upper 70s. Southwest winds 5 to 10 mph, becoming north 10 to 15 mph in the afternoon.
Sunday Night... Mostly cloudy. Much cooler with lows in the mid 40s. North winds 10 to 15 mph with gusts up to 25 mph.
Columbus Day... Mostly cloudy with a 40% chance of showers. Much cooler with highs in the upper 50s.
Monday Night... Mostly cloudy. Lows in the lower 40s. Highs in the upper 50s.
Tuesday... Mostly cloudy. Lows in the lower 40s. Highs in the upper 50s.
Tuesday Night... Partly cloudy. A slight chance of showers after midnight. Lows in the lower 40s. Chance of rain 20%.
Wednesday... Partly sunny. A slight chance of showers in the morning, then a chance of showers with a slight chance of thunderstorms in the afternoon. Highs in the lower 60s. Chance of rain 40%.
Wednesday Night... Mostly cloudy. A chance of showers with a slight chance of thunderstorms in the evening, then showers likely after midnight. Lows in the mid 40s. Chance of rain 60%.
Thursday... Mostly cloudy with a 50% chance of showers. Highs in the upper 50s. Lows in the lower 40s.
Thursday Night... Mostly cloudy with a 50% chance of showers. Highs in the upper 50s. Lows in the lower 40s.
POP = Probability of Precipitation
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