South Dakota weather, town by town

About South Dakota weather

The map on the Now tab shows every South Dakota 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 453 South Dakota towns with station normals, the warmest month is July, when the day usually reaches 85°F, and the coldest is January, when the night usually falls to 8°F. May is the wettest, with rain on about 11 days. July afternoons run from about 78°F in Johnson Siding to 91°F in Interior. January nights run from about 1°F in Claremont to 19°F in Hermosa.

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.

South Dakota weather records

Measured at the NOAA stations serving these towns, daily records 1877 to 2026. Station extremes, not official state records.

Common questions about South Dakota weather

What is the hottest temperature recorded at a South Dakota station?

119°F at Kennebec on July 5, 1936, in the NOAA daily station records myweatherrock holds (1877 to 2026).

What is the coldest temperature recorded at a South Dakota station?

-58°F at Mc Intosh 6 Se on February 17, 1936.

What is the most rain a South Dakota station has measured in one day?

8.92 inches at Newcastle on July 17, 1996.

What is the biggest one-day snowfall at a South Dakota station?

52 inches at Lead on March 14, 1973.

How many South Dakota towns have a weather page here?

484: 174 census-designated places, 157 cities, 152 towns, 1 villages. 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 South Dakota 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.