Weather WorldThompson Reservoir, SD 7-Day Night Weather Forecast
Quick Weather Clicks
Settings
Sun & Moon
Weather Quote O' the Day
Thompson Reservoir, SD Weather Forecast
Thompson Reservoir, SD Weather Forecast Date: 537 PM MDT Thu Aug 20 2026
The area/counties/county of: Central Black Hills, including the cities of: Hill City, Mt Rushmore, Johnson Siding, Keystone, Rockerville, Hisega, Pactola Reservoir, Custer, Jewel Cave, and Custer State Park.or toggle through each period.
Tonight... Mostly clear this evening, then becoming partly cloudy. Patchy smoke after midnight. Lows around 60. East winds around 5 mph with gusts up to 20 mph, becoming southwest after midnight.
Friday... Mostly sunny in the morning, then partly cloudy with a slight chance of showers and thunderstorms in the afternoon. Highs in the mid 80s. Southwest winds around 5 mph, becoming east with gusts up to 20 mph in the afternoon. Chance of rain 20%.
Friday Night... Partly cloudy. A slight chance of showers and thunderstorms in the evening. Lows in the upper 50s. Northeast winds 5 to 10 mph with gusts up to 20 mph. Chance of rain 20%.
Saturday... Partly cloudy. Highs in the upper 70s. East winds 5 to 10 mph with gusts up to 25 mph.
Saturday Night... Partly cloudy in the evening, then becoming mostly cloudy. A chance of showers. A chance of thunderstorms in the evening, then a slight chance of thunderstorms after midnight. Lows around 60. South winds 5 to 10 mph with gusts up to 30 mph. Chance of rain 40%.
Sunday... Partly cloudy. A slight chance of showers and thunderstorms in the afternoon. Highs in the mid 80s. Chance of rain 20%.
Sunday Night... Partly cloudy with a slight chance of showers and thunderstorms in the evening, then mostly clear after midnight. Lows in the lower 60s. Chance of rain 20%.
Monday... Mostly sunny in the morning, then partly cloudy with a chance of showers and thunderstorms in the afternoon. Highs in the mid 80s. Chance of rain 40%.
Monday Night... A slight chance of thunderstorms in the evening. Partly cloudy with a chance of showers. Lows in the upper 50s. Chance of rain 40%.
Tuesday... Partly cloudy with a chance of showers. A chance of thunderstorms in the afternoon. Highs in the upper 70s. Chance of rain 40%.
Tuesday Night... A slight chance of thunderstorms in the evening. Partly cloudy with a slight chance of showers. Lows in the mid 50s. Chance of rain 20%.
Wednesday... Partly cloudy in the morning, then clearing. A chance of showers. A chance of thunderstorms in the afternoon. Highs in the upper 70s. Chance of rain 50%.
Wednesday Night... Partly cloudy with a chance of showers with a slight chance of thunderstorms in the evening, then mostly clear after midnight. Lows in the mid 50s. Chance of rain 30%.
POP = Probability of Precipitation
Thompson Reservoir Radar Loop
Use the map search tool if you want to place a location marker on the radar map...