Lost River, ID Weather & Growing Conditions
This Afternoon
57°F
Showers And Thunderstorms Likely
Showers and thunderstorms likely. Mostly cloudy. High near 57, with temperatures falling to around 54 in the afternoon. South southeast wind around 8 mph. Chance of precipitation is 70%.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 57°F | Showers And Thunderstorms Likely | 8 mph SSE | 67% |
| Tonight | 40°F | Showers And Thunderstorms Likely | 6 mph ENE | 59% |
| Saturday | 51°F | Showers And Thunderstorms Likely | 5 mph ESE | 58% |
| Saturday Night | 39°F | Slight Chance Showers And Thunderstorms then Mostly Cloudy | 5 mph WNW | 21% |
| Sunday | 57°F | Mostly Sunny | 2 to 7 mph WSW | 2% |
| Sunday Night | 40°F | Mostly Clear | 6 mph WSW | 0% |
| Monday | 61°F | Sunny | 3 to 8 mph ENE | 0% |
| Monday Night | 43°F | Partly Cloudy | 2 to 6 mph WSW | 1% |
| Tuesday | 63°F | Mostly Sunny | 3 to 8 mph NE | 4% |
| Tuesday Night | 43°F | Partly Cloudy | 3 to 7 mph W | 3% |
| Wednesday | 65°F | Sunny | 3 to 9 mph W | 2% |
| Wednesday Night | 43°F | Mostly Clear | 2 to 8 mph WSW | 4% |
| Thursday | 66°F | Sunny | 2 to 8 mph E | 3% |
| Thursday Night | 44°F | Partly Cloudy | 2 to 8 mph SSW | 1% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Lost River, ID
Last spring frost
May 22
First fall frost
Sep 22
Growing season
119 days
Hardiness zone
5a
Explore more for Lost River, ID: full frost dates · planting calendar · Idaho frost dates
Climate data from the nearest NOAA station, Arco, Id (9.6 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.