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Warm River, ID Weather & Growing Conditions

Local forecast, frost dates, hardiness zone and planting guidance for Warm River, a city in Fremont County, Idaho.

Today
59°F
Light Rain Likely then Chance Showers And Thunderstorms
Rain likely before noon, then a chance of showers and thunderstorms between noon and 3pm, then a chance of showers and thunderstorms. Partly sunny, with a high near 59. South southwest wind around 5 mph. Chance of precipitation is 70%.

7-day forecast for Warm River

WhenTempForecastWindPrecip
Today 59°F Light Rain Likely then Chance Showers And Thunderstorms 5 mph SSW 68%
Tonight 38°F Slight Chance Light Rain then Mostly Cloudy 0 to 3 mph NNW 22%
Sunday 62°F Mostly Sunny 3 mph S 9%
Sunday Night 37°F Mostly Clear 3 mph E 0%
Monday 69°F Sunny 5 mph SE 0%
Monday Night 39°F Mostly Clear 1 to 5 mph ENE 0%
Tuesday 72°F Mostly Sunny 2 to 6 mph S 0%
Tuesday Night 42°F Partly Cloudy 2 mph ENE 12%
Wednesday 71°F Sunny 2 to 7 mph SW 9%
Wednesday Night 42°F Mostly Clear 3 mph E 4%
Thursday 74°F Sunny 5 mph SE 2%
Thursday Night 43°F Mostly Clear 5 mph E 1%
Friday 74°F Mostly Sunny 6 mph SSE 3%
Friday Night 44°F Partly Cloudy 3 mph ESE 9%

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

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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 Sep 19, 2026.