Letha, ID Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Letha, a community in Gem County, Idaho.
This Afternoon
76°F
Partly Sunny
Partly sunny, with a high near 76. Southeast wind around 3 mph.
7-day forecast for Letha
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 76°F | Partly Sunny | 3 mph SE | 6% |
| Tonight | 52°F | Slight Chance Showers And Thunderstorms | 0 to 3 mph NNE | 30% |
| Saturday | 80°F | Areas Of Fog then Mostly Sunny | 0 to 5 mph NW | 4% |
| Saturday Night | 51°F | Mostly Clear | 1 mph NNE | 0% |
| Sunday | 83°F | Sunny | 2 mph SSE | 0% |
| Sunday Night | 53°F | Mostly Clear | 1 mph NE | 0% |
| Monday | 84°F | Sunny | 1 mph ESE | 0% |
| Monday Night | 53°F | Partly Cloudy | 2 mph NNW | 0% |
| Tuesday | 85°F | Sunny | 1 mph NW | 0% |
| Tuesday Night | 52°F | Mostly Clear | 1 mph NNE | 2% |
| Wednesday | 85°F | Sunny | 2 mph SSE | 1% |
| Wednesday Night | 53°F | Mostly Clear | 2 mph NE | 1% |
| Thursday | 88°F | Sunny | 1 to 5 mph SE | 0% |
| Thursday Night | 55°F | Partly Cloudy | 3 mph ESE | 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 Sep 19, 2026.