Castroville, TX Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Castroville, a city in Medina County, Texas.
Tonight
51°F
Clear
Clear, with a low around 51. North wind around 5 mph.
7-day forecast for Castroville
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 51°F | Clear | 5 mph N | 0% |
| Wednesday | 76°F | Sunny | 5 mph E | 0% |
| Wednesday Night | 52°F | Mostly Clear | 0 to 5 mph ESE | 0% |
| Thursday | 80°F | Mostly Sunny | 0 to 5 mph SSE | 2% |
| Thursday Night | 57°F | Partly Cloudy | 0 to 15 mph N | 3% |
| Friday | 75°F | Sunny | 5 to 10 mph NNE | 0% |
| Friday Night | 52°F | Partly Cloudy | 5 to 10 mph NNE | 4% |
| Saturday | 70°F | Slight Chance Rain Showers | 5 to 10 mph NNE | 21% |
| Saturday Night | 50°F | Slight Chance Rain Showers then Mostly Cloudy | 5 to 10 mph NNE | 15% |
| Sunday | 71°F | Slight Chance Rain Showers then Mostly Sunny | 5 to 10 mph NNE | 15% |
| Sunday Night | 48°F | Mostly Clear | 0 to 5 mph NE | 5% |
| Monday | 72°F | Mostly Sunny | 5 mph ENE | 4% |
| Monday Night | 49°F | Mostly Clear | 0 to 5 mph E | 2% |
| Tuesday | 73°F | Mostly Sunny | 5 mph SE | 4% |
Forecast source: National Weather Service (api.weather.gov) for Castroville (29.360, -98.855). Updated through the day.
Growing snapshot for Castroville
Last spring frost
Feb 24
First fall frost
Dec 2
Growing season
283 days
Hardiness zone
9a
More local growing data for Castroville: nearby ZIP 78009 weather · frost dates · planting calendar · Texas frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Lytle 3W, Tx (9.5 mi from Castroville). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.