Letha, ID Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Letha, a community in Gem County, Idaho.
Today
90°F
Smoke
Smoke. Sunny, with a high near 90. West wind around 3 mph.
7-day forecast for Letha
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 90°F | Smoke | 3 mph W | 0% |
| Tonight | 55°F | Smoke | 0 to 3 mph SW | 0% |
| Wednesday | 94°F | Smoke | 2 mph N | 0% |
| Wednesday Night | 58°F | Areas Of Smoke | 2 mph E | 0% |
| Thursday | 101°F | Areas Of Smoke | 1 mph NE | 0% |
| Thursday Night | 63°F | Areas Of Smoke | 3 mph SSE | 0% |
| Friday | 102°F | Sunny | 0 to 3 mph NW | 0% |
| Friday Night | 64°F | Mostly Clear | 5 mph NNW | 0% |
| Saturday | 100°F | Sunny | 0 to 6 mph NNW | 0% |
| Saturday Night | 64°F | Mostly Clear | 6 mph NNW | 0% |
| Sunday | 96°F | Sunny | 6 mph NW | 0% |
| Sunday Night | 61°F | Mostly Clear | 6 mph NNW | 0% |
| Monday | 95°F | Sunny | 2 to 6 mph NW | 0% |
| Monday Night | 60°F | Mostly Clear | 2 to 6 mph NNW | 0% |
Forecast source: National Weather Service (api.weather.gov) for Letha (43.893, -116.647). Updated through the day.
Growing snapshot for Letha
Last spring frost
Apr 30
First fall frost
Oct 17
Growing season
168 days
Hardiness zone
7a
More local growing data for Letha: nearby ZIP 83636 weather · frost dates · planting calendar · Idaho frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Emmett 2 E, Id (10.3 mi from Letha). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.