Lemhi County weather, town by town
2 places in Lemhi County, Idaho, 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 1965 to 2026. Station extremes, not official state records.
Lemhi County Weather Facts
Lemhi County has 2 places on myweatherrock (2 cities), each with its own live forecast, hourly timeline, ten day outlook and radar. The hottest day in the station records is 105°F at Salmon-Ksra on July 10, 1973. The coldest night is -40°F at Leadore #2 on December 23, 1983. The wettest day brought 2 inches of rain at Leadore #2 on April 9, 2001. The biggest single-day snow measured 10.51 inches at Salmon-Ksra on January 11, 2000. Those are station measurements from NOAA's daily records, 1965 to 2026, not official state records. By area the largest place is Salmon, about 3 square miles.
About Lemhi County weather
The map on the Now tab shows every Lemhi 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 2 Lemhi County towns with station normals, the warmest month is July, when the day usually reaches 86°F, and the coldest is January, when the night usually falls to 9°F. May is the wettest, with rain on about 8 days.
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.
Lemhi County weather records
Measured at the NOAA stations serving these towns, daily records 1965 to 2026. Station extremes, not official state records.
Common questions about Lemhi County weather
- What is the hottest temperature recorded at a Lemhi County station?
- 105°F at Salmon-Ksra on July 10, 1973, in the NOAA daily station records myweatherrock holds (1965 to 2026).
- What is the coldest temperature recorded at a Lemhi County station?
- -40°F at Leadore #2 on December 23, 1983.
- What is the most rain a Lemhi County station has measured in one day?
- 2 inches at Leadore #2 on April 9, 2001.
- What is the biggest one-day snowfall at a Lemhi County station?
- 10.51 inches at Salmon-Ksra on January 11, 2000.
- How many Lemhi County towns have a weather page here?
- 2: 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 Lemhi 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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