Castle Hills, TX Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Castle Hills, a city in Bexar County, Texas.
Overnight
77°F
Partly Cloudy
Partly cloudy, with a low around 77. South southeast wind around 5 mph.
7-day forecast for Castle Hills
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 77°F | Partly Cloudy | 5 mph SSE | 0% |
| Tuesday | 97°F | Mostly Sunny | 5 to 10 mph SSE | 7% |
| Tuesday Night | 77°F | Mostly Clear | 5 to 15 mph SSE | 7% |
| Wednesday | 98°F | Mostly Sunny | 5 to 10 mph SSE | 2% |
| Wednesday Night | 77°F | Partly Cloudy | 5 to 15 mph SSE | 1% |
| Thursday | 98°F | Mostly Sunny | 5 to 10 mph SSE | 3% |
| Thursday Night | 77°F | Partly Cloudy | 5 to 10 mph SSE | 3% |
| Friday | 97°F | Mostly Sunny | 5 mph SE | 3% |
| Friday Night | 76°F | Mostly Clear | 5 to 10 mph SSE | 3% |
| Saturday | 95°F | Mostly Sunny | 0 to 5 mph SSE | 3% |
| Saturday Night | 76°F | Mostly Clear | 5 to 10 mph SE | 3% |
| Sunday | 95°F | Sunny | 5 to 10 mph SSE | 4% |
| Sunday Night | 76°F | Mostly Clear | 5 to 10 mph SSE | 4% |
| Monday | 96°F | Mostly Sunny | 5 to 10 mph SSE | 4% |
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 Aug 4, 2026.