Sweetwater, ID Weather & Growing Conditions
Tonight
53°F
Mostly Cloudy
Mostly cloudy, with a low around 53. South wind around 2 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 53°F | Mostly Cloudy | 2 mph S | 2% |
| Saturday | 75°F | Sunny | 0 to 3 mph N | 2% |
| Saturday Night | 52°F | Mostly Clear | 3 mph S | 2% |
| Sunday | 79°F | Sunny | 3 mph NE | 0% |
| Sunday Night | 53°F | Mostly Clear | 3 mph E | 0% |
| Monday | 82°F | Sunny | 3 mph NE | 0% |
| Monday Night | 55°F | Mostly Clear | 0 to 3 mph S | 0% |
| Tuesday | 80°F | Sunny | 0 to 5 mph NE | 2% |
| Tuesday Night | 53°F | Mostly Clear | 1 to 5 mph SE | 2% |
| Wednesday | 76°F | Sunny | 1 to 6 mph NE | 3% |
| Wednesday Night | 51°F | Partly Cloudy | 1 to 6 mph S | 3% |
| Thursday | 75°F | Mostly Sunny | 3 mph N | 2% |
| Thursday Night | 51°F | Partly Cloudy | 0 to 3 mph W | 6% |
| Friday | 71°F | Mostly Sunny | 0 to 6 mph NW | 11% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Sweetwater, ID
Last spring frost
May 23
First fall frost
Sep 25
Growing season
121 days
Hardiness zone
7b
Explore more for Sweetwater, ID: full frost dates · planting calendar · Idaho frost dates
Climate data from the nearest NOAA station, Winchester, Id (10.6 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.