Salmon, ID Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Salmon, a city in Lemhi County, Idaho.
Tonight
47°F
Showers And Thunderstorms
Showers and thunderstorms before 2am, then rain showers and patchy fog. Cloudy, with a low around 47. West northwest wind 1 to 5 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
7-day forecast for Salmon
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 47°F | Showers And Thunderstorms | 1 to 5 mph WNW | 93% |
| Saturday | 65°F | Rain Showers Likely | 0 to 3 mph N | 71% |
| Saturday Night | 44°F | Slight Chance Rain Showers then Areas Of Fog | 2 mph N | 21% |
| Sunday | 75°F | Areas Of Fog then Mostly Sunny | 2 mph NNE | 0% |
| Sunday Night | 44°F | Mostly Clear | 2 mph NE | 0% |
| Monday | 79°F | Sunny | 2 mph NNE | 0% |
| Monday Night | 46°F | Partly Cloudy | 2 mph NNW | 1% |
| Tuesday | 79°F | Mostly Sunny | 0 to 3 mph ESE | 1% |
| Tuesday Night | 45°F | Mostly Clear | 0 to 3 mph WSW | 5% |
| Wednesday | 79°F | Sunny | 0 to 3 mph S | 3% |
| Wednesday Night | 46°F | Mostly Clear | 3 mph S | 4% |
| Thursday | 82°F | Sunny | 3 mph S | 1% |
| Thursday Night | 48°F | Partly Cloudy | 2 to 9 mph SSW | 1% |
| Friday | 81°F | Mostly Sunny | 1 to 6 mph SSW | 0% |
Forecast source: National Weather Service (api.weather.gov) for Salmon (45.174, -113.895). Updated through the day.
Growing snapshot for Salmon
Last spring frost
May 17
First fall frost
Sep 24
Growing season
127 days
Hardiness zone
5b
More local growing data for Salmon: nearby ZIP 83467 weather · frost dates · planting calendar · Idaho frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Salmon-Ksra, Id (9.1 mi from Salmon). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.