Weather WorldHarrison Flat School, SD 7-Day Night Weather Forecast
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Harrison Flat School, SD Weather Forecast
Harrison Flat School, SD Weather Forecast Date: 352 PM MDT Thu Oct 22 2026
The area/counties/county of: Custer Co Plains, including the city of Folsom.or toggle through each period.
Late This Afternoon... Partly cloudy. Highs in the lower 80s. South winds 10 to 15 mph with gusts up to 25 mph.
Tonight... Partly cloudy. Lows in the lower 50s. South winds 5 to 10 mph.
Friday... Partly cloudy in the morning, then clearing. Highs in the mid 80s. Southwest winds 10 to 20 mph. Gusts up to 30 mph, increasing to 40 mph in the afternoon.
Friday Night... Mostly clear in the evening, then becoming partly cloudy. Breezy with lows in the lower 40s. Northwest winds 20 to 30 mph with gusts up to 50 mph.
Saturday... Partly cloudy in the morning, then clearing. Breezy and much cooler with highs in the lower 50s. North winds 20 to 30 mph, diminishing to 10 to 20 mph in the afternoon. Gusts up to 40 mph.
Saturday Night... Partly cloudy. Lows in the mid 30s. North winds 5 to 10 mph.
Sunday... Mostly cloudy with a 50% chance of rain. Highs in the upper 40s.
Sunday Night... Cloudy with rain likely. Lows in the lower 30s. Chance of rain 60%.
Monday... Mostly cloudy with a 50% chance of rain. Highs in the mid 40s.
Monday Night... Mostly cloudy with a 30% chance of rain. Lows in the mid 30s.
Tuesday... Becoming partly cloudy. Highs in the mid 50s.
Tuesday Night... Partly cloudy. A slight chance of rain in the evening. Lows in the mid 30s. Chance of rain 20%.
Wednesday... Partly cloudy in the morning, then clearing. Highs in the upper 50s.
Wednesday Night... Partly cloudy. Lows in the lower 30s.
POP = Probability of Precipitation
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