Caldwell, ID Weather & Growing Conditions
Tonight
50°F
Mostly Clear
Mostly clear, with a low around 50. South southeast wind around 2 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 50°F | Mostly Clear | 2 mph SSE | 1% |
| Sunday | 81°F | Patchy Fog then Sunny | 3 mph SE | 1% |
| Sunday Night | 49°F | Mostly Clear | 2 mph E | 0% |
| Monday | 84°F | Sunny | 5 mph SE | 0% |
| Monday Night | 51°F | Partly Cloudy | 2 mph NNW | 0% |
| Tuesday | 86°F | Mostly Sunny | 2 mph ENE | 0% |
| Tuesday Night | 52°F | Mostly Clear | 3 mph E | 0% |
| Wednesday | 85°F | Sunny | 1 to 5 mph WSW | 0% |
| Wednesday Night | 51°F | Partly Cloudy | 5 mph NNW | 1% |
| Thursday | 86°F | Sunny | 5 mph SW | 0% |
| Thursday Night | 52°F | Partly Cloudy | 5 mph W | 1% |
| Friday | 82°F | Mostly Sunny | 7 mph S | 2% |
| Friday Night | 48°F | Partly Cloudy | 7 mph WNW | 6% |
| Saturday | 76°F | Mostly Sunny | 3 to 7 mph NW | 5% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Caldwell, ID
Last spring frost
Apr 29
First fall frost
Oct 13
Growing season
164 days
Hardiness zone
7a
Explore more for Caldwell, ID: full frost dates · planting calendar · Idaho frost dates
Climate data from the nearest NOAA station, Nampa Sugar Factory, Id (5.6 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 20, 2026.