Kirby, TX Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Kirby, a city in Bexar County, Texas.
Today
98°F
Mostly Sunny
Mostly sunny, with a high near 98. Heat index values as high as 105. South southeast wind 5 to 15 mph.
7-day forecast for Kirby
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 98°F | Mostly Sunny | 5 to 15 mph SSE | 5% |
| Tonight | 77°F | Mostly Clear | 5 to 15 mph SSE | 5% |
| Wednesday | 98°F | Mostly Sunny | 5 to 10 mph SSE | 1% |
| Wednesday Night | 77°F | Mostly Clear | 5 to 15 mph SSE | 1% |
| Thursday | 97°F | Mostly Sunny | 5 to 10 mph SSE | 3% |
| Thursday Night | 76°F | Partly Cloudy | 5 to 15 mph SSE | 4% |
| Friday | 96°F | Mostly Sunny | 5 to 10 mph SSE | 5% |
| Friday Night | 76°F | Partly Cloudy | 5 to 10 mph SSE | 5% |
| Saturday | 95°F | Mostly Sunny | 0 to 10 mph SSE | 4% |
| 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 15 mph SSE | 4% |
| Monday | 96°F | Mostly Sunny | 5 to 15 mph SSE | 5% |
| Monday Night | 76°F | Mostly Clear | 10 to 15 mph SSE | 5% |
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 Aug 4, 2026.