Warm River, ID Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Warm River, a city in Fremont County, Idaho.
This Afternoon
47°F
Mostly Sunny
Mostly sunny. High near 47, with temperatures falling to around 41 in the afternoon. Southwest wind around 2 mph.
7-day forecast for Warm River
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 47°F | Mostly Sunny | 2 mph SW | 0% |
| Tonight | 28°F | Mostly Cloudy | 5 mph NE | 0% |
| Wednesday | 49°F | Patchy Fog then Partly Sunny | 5 mph W | 0% |
| Wednesday Night | 27°F | Partly Cloudy then Areas Of Fog | 2 mph ESE | 0% |
| Thursday | 44°F | Areas Of Fog then Chance Light Rain | 2 to 6 mph S | 28% |
| Thursday Night | 29°F | Slight Chance Rain And Snow | 2 mph S | 28% |
| Friday | 41°F | Partly Sunny | 1 to 6 mph SW | 6% |
| Friday Night | 27°F | Partly Cloudy | 2 mph ESE | 6% |
| Saturday | 47°F | Mostly Sunny | 0 to 3 mph E | 0% |
| Saturday Night | 29°F | Partly Cloudy | 2 mph NE | 0% |
| Sunday | 52°F | Mostly Sunny | 0 to 5 mph SSE | 0% |
| Sunday Night | 31°F | Partly Cloudy | 2 mph ESE | 0% |
| Monday | 53°F | Mostly Sunny | 2 mph E | 3% |
| Monday Night | 33°F | Mostly Cloudy | 2 mph ENE | 3% |
Forecast source: National Weather Service (api.weather.gov) for Warm River (44.121, -111.321). Updated through the day.
Growing snapshot for Warm River
Last spring frost
May 21
First fall frost
Sep 21
Growing season
121 days
Hardiness zone
5a
More local growing data for Warm River: nearby ZIP 83420 weather · frost dates · planting calendar · Idaho frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Ashton 1N, Id (6.6 mi from Warm River). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 3, 2026.