Roberts County weather, town by town
14 places in Roberts 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 1900 to 2026. Station extremes, not official state records.
Roberts County Weather Facts
Roberts County has 14 places on myweatherrock (8 towns, 4 census-designated places, 2 cities), each with its own live forecast, hourly timeline, ten day outlook and radar. The hottest day in the station records is 113°F at Sisseton on May 30, 1934. The coldest night is -40°F at Summit 1 W on February 9, 1994. The wettest day brought 7.94 inches of rain at Victor 4 N on June 21, 1941. The biggest single-day snow measured 24.21 inches at Sisseton on January 4, 1997. Those are station measurements from NOAA's daily records, 1900 to 2026, not official state records. By area the largest place is Long Hollow, about 14 square miles.
About Roberts County weather
The map on the Now tab shows every Roberts 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 14 Roberts 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. January nights run from about 1°F in New Effington to 5°F in Agency Village.
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.
Roberts County weather records
Measured at the NOAA stations serving these towns, daily records 1900 to 2026. Station extremes, not official state records.
Common questions about Roberts County weather
- What is the hottest temperature recorded at a Roberts County station?
- 113°F at Sisseton on May 30, 1934, in the NOAA daily station records myweatherrock holds (1900 to 2026).
- What is the coldest temperature recorded at a Roberts County station?
- -40°F at Summit 1 W on February 9, 1994.
- What is the most rain a Roberts County station has measured in one day?
- 7.94 inches at Victor 4 N on June 21, 1941.
- What is the biggest one-day snowfall at a Roberts County station?
- 24.21 inches at Sisseton on January 4, 1997.
- How many Roberts County towns have a weather page here?
- 14: 8 towns, 4 census-designated places, 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 Roberts 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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