Lost River, ID Weather & Growing Conditions
Today
73°F
Areas Of Smoke
Areas of smoke. Sunny. High near 73, with temperatures falling to around 71 in the afternoon. South southwest wind 3 to 14 mph, with gusts as high as 23 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 73°F | Areas Of Smoke | 3 to 14 mph SSW | 0% |
| Tonight | 48°F | Areas Of Smoke | 9 to 17 mph NW | 0% |
| Wednesday | 77°F | Areas Of Smoke | 5 to 13 mph SSW | 0% |
| Wednesday Night | 51°F | Mostly Clear | 9 to 13 mph WNW | 0% |
| Thursday | 82°F | Sunny | 6 to 12 mph W | 0% |
| Thursday Night | 56°F | Mostly Clear | 10 to 14 mph WNW | 0% |
| Friday | 84°F | Sunny | 6 to 15 mph W | 0% |
| Friday Night | 55°F | Mostly Clear | 12 to 17 mph WNW | 0% |
| Saturday | 84°F | Sunny | 6 to 18 mph W | 0% |
| Saturday Night | 56°F | Mostly Clear | 9 to 20 mph WNW | 0% |
| Sunday | 82°F | Sunny | 6 to 22 mph W | 1% |
| Sunday Night | 54°F | Mostly Clear | 8 to 22 mph WNW | 1% |
| Monday | 81°F | Sunny | 6 to 21 mph WSW | 0% |
| Monday Night | 54°F | Mostly Clear | 9 to 22 mph WNW | 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 Aug 4, 2026.