Caldwell, ID Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Caldwell, a city in Canyon County, Idaho.
Overnight
50°F
Smoke
Smoke. Mostly clear. Low around 50, with temperatures rising to around 54 overnight. West wind around 6 mph.
7-day forecast for Caldwell
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 50°F | Smoke | 6 mph W | 0% |
| Tuesday | 89°F | Smoke | 5 mph NW | 0% |
| Tuesday Night | 54°F | Areas Of Smoke | 1 to 5 mph WNW | 0% |
| Wednesday | 94°F | Smoke | 3 mph NNW | 0% |
| Wednesday Night | 57°F | Areas Of Smoke | 3 mph ESE | 0% |
| Thursday | 100°F | Areas Of Smoke | 3 mph NE | 0% |
| Thursday Night | 61°F | Areas Of Smoke | 5 mph WSW | 0% |
| Friday | 101°F | Sunny | 1 to 6 mph NW | 0% |
| Friday Night | 63°F | Mostly Clear | 3 to 7 mph NW | 0% |
| Saturday | 99°F | Sunny | 3 to 8 mph NW | 0% |
| Saturday Night | 63°F | Mostly Clear | 3 to 7 mph NW | 0% |
| Sunday | 96°F | Sunny | 6 to 9 mph NW | 0% |
| Sunday Night | 60°F | Mostly Clear | 8 mph NW | 0% |
| Monday | 94°F | Sunny | 8 mph NW | 0% |
Forecast source: National Weather Service (api.weather.gov) for Caldwell (43.646, -116.659). Updated through the day.
Growing snapshot for Caldwell
Last spring frost
Apr 29
First fall frost
Oct 13
Growing season
164 days
Hardiness zone
7a
More local growing data for Caldwell: nearby ZIP 83605 weather · frost dates · planting calendar · Idaho frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Nampa Sugar Factory, Id (5.6 mi from Caldwell). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.