Castleford, ID Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Castleford, a city in Twin Falls County, Idaho.
Tonight
48°F
Mostly Cloudy then Chance Showers And Thunderstorms
A chance of showers and thunderstorms after 5am. Mostly cloudy, with a low around 48. Southwest wind around 10 mph. Chance of precipitation is 30%.
7-day forecast for Castleford
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 48°F | Mostly Cloudy then Chance Showers And Thunderstorms | 10 mph SW | 29% |
| Saturday | 69°F | Chance Showers And Thunderstorms then Partly Sunny | 8 to 13 mph W | 35% |
| Saturday Night | 45°F | Partly Cloudy | 6 mph WSW | 4% |
| Sunday | 76°F | Sunny | 7 mph E | 0% |
| Sunday Night | 47°F | Mostly Clear | 6 mph ESE | 0% |
| Monday | 80°F | Mostly Sunny | 5 to 9 mph E | 0% |
| Monday Night | 51°F | Partly Cloudy | 3 to 7 mph NNW | 0% |
| Tuesday | 79°F | Mostly Sunny | 3 to 7 mph W | 2% |
| Tuesday Night | 50°F | Partly Cloudy | 7 mph SW | 0% |
| Wednesday | 82°F | Sunny | 6 mph ESE | 1% |
| Wednesday Night | 52°F | Mostly Clear | 7 to 10 mph SE | 1% |
| Thursday | 84°F | Sunny | 7 to 10 mph ESE | 1% |
| Thursday Night | 54°F | Partly Cloudy | 9 to 15 mph SE | 1% |
| Friday | 84°F | Mostly Sunny | 9 mph WSW | 2% |
Forecast source: National Weather Service (api.weather.gov) for Castleford (42.521, -114.872). Updated through the day.
Growing snapshot for Castleford
Last spring frost
May 17
First fall frost
Sep 29
Growing season
132 days
Hardiness zone
7a
More local growing data for Castleford: nearby ZIP 83316 weather · frost dates · planting calendar · Idaho frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Castleford 2 N, Id (5.3 mi from Castleford). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.