Castleford, ID Weather & Growing Conditions
Tonight
43°F
Mostly Clear
Mostly clear. Low around 43, with temperatures rising to around 47 overnight. South southwest wind around 8 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 43°F | Mostly Clear | 8 mph SSW | 1% |
| Sunday | 74°F | Sunny | 7 mph E | 1% |
| Sunday Night | 47°F | Mostly Clear | 9 mph ESE | 0% |
| Monday | 79°F | Sunny | 10 mph ESE | 0% |
| Monday Night | 52°F | Partly Cloudy | 6 to 9 mph ESE | 0% |
| Tuesday | 79°F | Partly Sunny | 7 mph SSE | 6% |
| Tuesday Night | 52°F | Partly Cloudy | 6 to 13 mph SW | 6% |
| Wednesday | 81°F | Sunny | 6 to 10 mph SSE | 1% |
| Wednesday Night | 54°F | Partly Cloudy | 6 to 16 mph S | 0% |
| Thursday | 83°F | Sunny | 12 to 16 mph S | 0% |
| Thursday Night | 56°F | Partly Cloudy | 10 to 21 mph SSE | 1% |
| Friday | 81°F | Mostly Sunny | 13 to 18 mph S | 2% |
| Friday Night | 51°F | Mostly Cloudy | 10 to 15 mph SSW | 4% |
| Saturday | 75°F | Mostly Sunny | 12 mph WSW | 6% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Castleford, ID
Last spring frost
May 17
First fall frost
Sep 29
Growing season
132 days
Hardiness zone
6b
Explore more for Castleford, ID: full frost dates · planting calendar · Idaho frost dates
Climate data from the nearest NOAA station, Castleford 2 N, Id (14.2 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 20, 2026.