Grant County weather, town by town
9 places in Grant 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.
Grant County Weather Facts
Grant County has 9 places on myweatherrock (7 towns, 2 cities), each with its own live forecast, hourly timeline, ten day outlook and radar. The hottest day in the station records is 110°F at Madison Wwtp on July 31, 1988. The coldest night is -40°F at Summit 1 W on February 9, 1994. The wettest day brought 5.61 inches of rain at Summit 1 W on June 29, 1971. The biggest single-day snow measured 22.01 inches at Summit 1 W 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 Milbank, about 3 square miles.
About Grant County weather
The map on the Now tab shows every Grant 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 8 Grant 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 3°F. June is the wettest, with rain on about 11 days. July afternoons run from about 80°F in Big Stone to 83°F in Albee.
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.
Grant 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 Grant County weather
- What is the hottest temperature recorded at a Grant County station?
- 110°F at Madison Wwtp on July 31, 1988, in the NOAA daily station records myweatherrock holds (1893 to 2026).
- What is the coldest temperature recorded at a Grant County station?
- -40°F at Summit 1 W on February 9, 1994.
- What is the most rain a Grant County station has measured in one day?
- 5.61 inches at Summit 1 W on June 29, 1971.
- What is the biggest one-day snowfall at a Grant County station?
- 22.01 inches at Summit 1 W on January 4, 1997.
- How many Grant County towns have a weather page here?
- 9: 7 towns, 2 cities. 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 Grant 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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