Lyman County weather, town by town
7 places in Lyman 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.
Lyman County Weather Facts
Lyman County has 7 places on myweatherrock (3 towns, 3 census-designated places, 1 cities), each with its own live forecast, hourly timeline, ten day outlook and radar. The hottest day in the station records is 119°F at Kennebec on July 5, 1936. The coldest night is -45°F at Kennebec on February 9, 1899. The wettest day brought 7.54 inches of rain at Chamberlain Muni Ap on June 20, 2024. The biggest single-day snow measured 24.02 inches at Murdo on March 14, 1913. Those are station measurements from NOAA's daily records, 1893 to 2026, not official state records. By area the largest place is Oacoma, about 3 square miles.
About Lyman County weather
The map on the Now tab shows every Lyman 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 7 Lyman County towns with station normals, the warmest month is July, when the day usually reaches 89°F, and the coldest is January, when the night usually falls to 10°F. May is the wettest, with rain on about 10 days. July afternoons run from about 87°F in Lower Brule to 90°F in Kennebec. January nights run from about 7°F in Lower Brule to 12°F in Oacoma.
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.
Lyman 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 Lyman County weather
- What is the hottest temperature recorded at a Lyman County station?
- 119°F at Kennebec on July 5, 1936, in the NOAA daily station records myweatherrock holds (1893 to 2026).
- What is the coldest temperature recorded at a Lyman County station?
- -45°F at Kennebec on February 9, 1899.
- What is the most rain a Lyman County station has measured in one day?
- 7.54 inches at Chamberlain Muni Ap on June 20, 2024.
- What is the biggest one-day snowfall at a Lyman County station?
- 24.02 inches at Murdo on March 14, 1913.
- How many Lyman County towns have a weather page here?
- 7: 3 towns, 3 census-designated places, 1 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 Lyman 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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