Kirby, TX Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Kirby, a city in Bexar County, Texas.
Tonight
75°F
Partly Cloudy
Partly cloudy, with a low around 75. Southeast wind 0 to 10 mph.
7-day forecast for Kirby
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 75°F | Partly Cloudy | 0 to 10 mph SE | 13% |
| Saturday | 97°F | Sunny | 5 mph ESE | 0% |
| Saturday Night | 75°F | Mostly Clear | 5 to 10 mph SSE | 0% |
| Sunday | 98°F | Mostly Sunny | 5 mph SSE | 0% |
| Sunday Night | 76°F | Partly Cloudy | 5 to 10 mph SE | 10% |
| Monday | 98°F | Mostly Sunny | 5 mph ESE | 10% |
| Monday Night | 76°F | Mostly Clear | 0 to 10 mph SE | 9% |
| Tuesday | 98°F | Sunny | 0 to 10 mph ENE | 11% |
| Tuesday Night | 76°F | Slight Chance Showers And Thunderstorms | 0 to 10 mph E | 18% |
| Wednesday | 98°F | Mostly Sunny | 5 to 10 mph ENE | 14% |
| Wednesday Night | 76°F | Partly Cloudy | 0 to 10 mph E | 10% |
| Thursday | 97°F | Mostly Sunny | 5 to 10 mph ENE | 8% |
| Thursday Night | 75°F | Partly Cloudy | 5 to 10 mph E | 8% |
| Friday | 97°F | Mostly Sunny | 5 to 10 mph ENE | 9% |
Forecast source: National Weather Service (api.weather.gov) for Kirby (29.462, -98.385). Updated through the day.
Growing snapshot for Kirby
Last spring frost
Feb 25
First fall frost
Nov 28
Growing season
277 days
Hardiness zone
9a
More local growing data for Kirby: nearby ZIP 78219 weather · frost dates · planting calendar · Texas frost dates
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Windcrest
Climate data from the nearest NOAA station, San Antonio Incarnate Word, Tx (5.7 mi from Kirby). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.