Day County weather, town by town
9 places in Day County, South Dakota, each with its own live forecast and radar, and where a station sits close enough, measured weather records.
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Measured at the NOAA stations serving these towns, daily records 1893 to 2026. Station extremes, not official state records.
Day County Weather Facts
Day County has 9 places on myweatherrock (5 towns, 3 cities, 1 census-designated places), each with its own live forecast, hourly timeline, ten day outlook and radar. The hottest day in the station records is 108°F at Webster on July 11, 1894. The coldest night is -43°F at Webster on February 1, 1895. The wettest day brought 4.72 inches of rain at Webster on July 8, 2026. The biggest single-day snow measured 20 inches at Webster on January 4, 1997. Those are station measurements from NOAA's daily records, 1893 to 2026, not official state records. By area the largest place is Webster, about 2 square miles.
About Day County weather
The map on the Now tab shows every Day County town's current temperature from our own server, one dot per town. Tap any dot, or type a town above, for that town's full forecast.
What the weather is usually like
Across the 9 Day County towns with station normals, the warmest month is July, when the day usually reaches 82°F, and the coldest is January, when the night usually falls to 4°F. May is the wettest, with rain on about 10 days. January nights run from about 3°F in Butler to 6°F in Andover.
Means of the 1991 to 2020 station normals serving these towns, as published by NOAA; each town's page carries its own.
Where these numbers come from
- Current conditions and forecast: NOAA forecast grids decoded on our own server, corrected against the nearest reporting station and our own radar. Open-Meteo is consulted only as a fallback when our server is silent.
- Records: computed by myweatherrock from NOAA GHCN-Daily station records at the stations serving these towns. Measurements, not estimates.
- Warnings and alerts: the National Weather Service, passed through unchanged.
Day County weather records
Measured at the NOAA stations serving these towns, daily records 1893 to 2026. Station extremes, not official state records.
Common questions about Day County weather
- What is the hottest temperature recorded at a Day County station?
- 108°F at Webster on July 11, 1894, in the NOAA daily station records myweatherrock holds (1893 to 2026).
- What is the coldest temperature recorded at a Day County station?
- -43°F at Webster on February 1, 1895.
- What is the most rain a Day County station has measured in one day?
- 4.72 inches at Webster on July 8, 2026.
- What is the biggest one-day snowfall at a Day County station?
- 20 inches at Webster on January 4, 1997.
- How many Day County towns have a weather page here?
- 9: 5 towns, 3 cities, 1 census-designated places. Each page carries current conditions, the hourly timeline, the ten day outlook, radar, and where a station sits close enough, measured records.
- Where does the Day County forecast come from?
- NOAA forecast grids (the National Weather Service digital forecast, the National Blend of Models, HRRR and GFS) decoded on our own server, corrected against the nearest reporting station and our own radar. Open-Meteo is consulted only as a fallback when our server is silent.
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