Castle Hills, TX Weather & Growing Conditions
Overnight
76°F
Partly Cloudy
Partly cloudy, with a low around 76. Southeast wind 0 to 5 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 76°F | Partly Cloudy | 0 to 5 mph SE | 3% |
| Saturday | 96°F | Mostly Sunny | 0 to 5 mph SE | 2% |
| Saturday Night | 75°F | Mostly Clear | 5 to 10 mph SSE | 0% |
| Sunday | 97°F | Mostly Sunny | 0 to 5 mph S | 0% |
| Sunday Night | 76°F | Partly Cloudy | 5 mph SSE | 7% |
| Monday | 97°F | Sunny | 0 to 5 mph SE | 8% |
| Monday Night | 76°F | Mostly Clear | 0 to 5 mph SE | 10% |
| Tuesday | 97°F | Sunny | 0 to 10 mph ENE | 12% |
| Tuesday Night | 76°F | Slight Chance Showers And Thunderstorms | 5 to 10 mph E | 20% |
| Wednesday | 97°F | Slight Chance Rain Showers then Mostly Sunny | 5 to 10 mph ENE | 20% |
| Wednesday Night | 76°F | Partly Cloudy | 0 to 10 mph E | 11% |
| Thursday | 96°F | Mostly Sunny | 5 to 10 mph ENE | 10% |
| Thursday Night | 75°F | Partly Cloudy | 5 to 10 mph E | 5% |
| Friday | 96°F | Mostly Sunny | 5 to 10 mph ENE | 5% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Castle Hills, TX
Last spring frost
Feb 26
First fall frost
Nov 28
Growing season
277 days
Hardiness zone
9a
Explore more for Castle Hills, TX: full frost dates · planting calendar · Texas frost dates
Climate data from the nearest NOAA station, San Antonio Intl Ap, Tx (3 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.