Letha, ID Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Letha, a community in Gem County, Idaho.
This Afternoon
58°F
Mostly Cloudy
Mostly cloudy, with a high near 58. North northwest wind around 2 mph.
7-day forecast for Letha
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 58°F | Mostly Cloudy | 2 mph NNW | 1% |
| Tonight | 35°F | Mostly Cloudy | 1 mph NW | 14% |
| Wednesday | 59°F | Sunny | 2 mph WNW | 2% |
| Wednesday Night | 35°F | Mostly Cloudy then Slight Chance Rain Showers | 2 mph ENE | 15% |
| Thursday | 57°F | Slight Chance Rain Showers then Partly Sunny | 1 mph NW | 15% |
| Thursday Night | 31°F | Mostly Clear | 1 mph NNE | 1% |
| Friday | 57°F | Partly Sunny | 1 mph NE | 1% |
| Friday Night | 34°F | Partly Cloudy | 0 mph | 1% |
| Saturday | 62°F | Mostly Sunny | 2 mph E | 1% |
| Saturday Night | 38°F | Partly Cloudy | 1 to 6 mph ESE | 0% |
| Sunday | 63°F | Mostly Sunny | 1 to 6 mph S | 0% |
| Sunday Night | 37°F | Mostly Cloudy | 1 mph NNW | 1% |
| Monday | 62°F | Partly Sunny | 1 mph W | 4% |
| Monday Night | 37°F | Mostly Cloudy | 0 mph | 7% |
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 Nov 3, 2026.