Castle Hills, TX Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Castle Hills, a city in Bexar County, Texas.
Today
75°F
Sunny
Sunny, with a high near 75. Northeast wind 0 to 5 mph.
7-day forecast for Castle Hills
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 75°F | Sunny | 0 to 5 mph NE | 0% |
| Tonight | 55°F | Clear | 0 to 5 mph E | 0% |
| Thursday | 78°F | Sunny | 0 to 5 mph S | 0% |
| Thursday Night | 59°F | Partly Cloudy | 0 to 20 mph N | 1% |
| Friday | 73°F | Sunny | 5 to 15 mph N | 0% |
| Friday Night | 55°F | Partly Cloudy | 5 to 15 mph NNE | 0% |
| Saturday | 68°F | Partly Sunny then Slight Chance Rain Showers | 10 to 15 mph NNE | 18% |
| Saturday Night | 53°F | Chance Rain Showers | 5 to 15 mph NNE | 29% |
| Sunday | 66°F | Slight Chance Rain Showers then Partly Sunny | 5 to 10 mph NNE | 15% |
| Sunday Night | 49°F | Partly Cloudy | 0 to 5 mph N | 5% |
| Monday | 68°F | Sunny | 0 to 5 mph ENE | 5% |
| Monday Night | 50°F | Partly Cloudy | 0 to 5 mph ESE | 3% |
| Tuesday | 70°F | Mostly Sunny | 0 to 5 mph ESE | 5% |
| Tuesday Night | 53°F | Slight Chance Rain Showers then Partly Cloudy | 0 mph | 15% |
Forecast source: National Weather Service (api.weather.gov) for Castle Hills (29.525, -98.519). Updated through the day.
Growing snapshot for Castle Hills
Last spring frost
Feb 26
First fall frost
Nov 28
Growing season
277 days
Hardiness zone
9a
More local growing data for Castle Hills: nearby ZIP 78213 weather · frost dates · planting calendar · Texas frost dates
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Windcrest
Climate data from the nearest NOAA station, San Antonio Intl Ap, Tx (3 mi from Castle Hills). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.