Castroville, CA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Castroville, a community in Monterey County, California.
Tonight
55°F
Mostly Cloudy
Mostly cloudy, with a low around 55. Southwest wind 2 to 9 mph.
7-day forecast for Castroville
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 55°F | Mostly Cloudy | 2 to 9 mph SW | 0% |
| Saturday | 67°F | Patchy Fog then Partly Sunny | 1 to 10 mph WSW | 0% |
| Saturday Night | 55°F | Mostly Cloudy | 2 to 8 mph SW | 0% |
| Sunday | 65°F | Mostly Cloudy | 2 to 10 mph WSW | 3% |
| Sunday Night | 55°F | Mostly Cloudy | 5 to 10 mph WSW | 3% |
| Monday | 65°F | Partly Sunny | 3 to 12 mph W | 1% |
| Monday Night | 55°F | Mostly Cloudy then Patchy Fog | 2 to 12 mph WSW | 1% |
| Tuesday | 67°F | Patchy Fog then Mostly Sunny | 1 to 10 mph W | 0% |
| Tuesday Night | 56°F | Partly Cloudy | 2 to 10 mph NNE | 0% |
| Wednesday | 74°F | Mostly Sunny | 2 to 9 mph NW | 0% |
| Wednesday Night | 58°F | Partly Cloudy | 2 to 8 mph NE | 0% |
| Thursday | 75°F | Mostly Sunny | 2 to 9 mph N | 0% |
| Thursday Night | 58°F | Partly Cloudy | 3 to 9 mph SSW | 0% |
| Friday | 72°F | Mostly Sunny | 2 to 10 mph WSW | 0% |
Forecast source: National Weather Service (api.weather.gov) for Castroville (36.765, -121.753). Updated through the day.
Growing snapshot for Castroville
Last spring frost
Feb 4
First fall frost
Dec 6
Growing season
311 days
Hardiness zone
9b
More local growing data for Castroville: nearby ZIP 95012 weather · frost dates · planting calendar · California frost dates
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Climate data from the nearest NOAA station, Salinas #2, Ca (9.7 mi from Castroville). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.