Weather WorldFlat Lake, SD 7-Day Weather Forecast
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Flat Lake Weather Forecast
Flat Lake, SD Weather Forecast Date: 321 AM CDT Sat Oct 24 2026
Weather forecast for Flat Lake, SD
Today Hi: 55°FHi: 13°C Lo: 35°F Lo: 2°C |
Today... Mostly cloudy with a slight chance of rain this morning, then partly sunny this afternoon. Much cooler with highs in the mid 50s. Northwest winds 15 to 20 mph with gusts up to 35 mph. Chance of rain 20%. |
Sun Hi: 49°FHi: 9°C Lo: 31°F Lo: -1°C |
Sunday... Cloudy. A slight chance of rain in the afternoon. Highs in the upper 40s. Northeast winds around 5 mph. Chance of rain 20%. |
| Mon Hi: 41°FHi: 5°C Lo: 31°F Lo: -1°C |
Monday... Cloudy. A chance of rain in the morning, then rain likely in the afternoon. Highs in the lower 40s. Northeast winds 10 to 15 mph with gusts up to 25 mph. Chance of rain 70%. |
| Tue Hi: 49°FHi: 9°C Lo: 39°F Lo: 4°C |
Tuesday... Mostly cloudy. A chance of rain in the morning. Highs in the upper 40s. Chance of rain 30%. |
| Wed Hi: 55°FHi: 13°C Lo: 35°F Lo: 2°C |
Wednesday... Mostly cloudy with a slight chance of rain in the morning, then partly sunny in the afternoon. Highs in the mid 50s. Chance of rain 20%. |
Thu Hi: 51°FHi: 11°C Lo: 39°F Lo: 4°C |
Thursday... Partly cloudy. Lows in the mid 30s. Highs in the lower 50s. |
| Fri Hi: 55°FHi: 13°C |
Friday... Mostly cloudy in the morning, then partly sunny with a slight chance of rain in the afternoon. Highs in the mid 50s. Chance of rain 20%. |
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