Katy, TX Weather & Growing Conditions
Today
99°F
Sunny
Sunny, with a high near 99. Heat index values as high as 107. South wind 5 to 10 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 99°F | Sunny | 5 to 10 mph S | 4% |
| Tonight | 77°F | Mostly Clear | 5 to 15 mph S | 9% |
| Wednesday | 99°F | Sunny | 0 to 10 mph S | 11% |
| Wednesday Night | 77°F | Clear | 5 to 15 mph S | 8% |
| Thursday | 98°F | Sunny then Slight Chance Showers And Thunderstorms | 0 to 10 mph S | 17% |
| Thursday Night | 77°F | Slight Chance Showers And Thunderstorms then Mostly Clear | 5 to 15 mph S | 17% |
| Friday | 96°F | Sunny then Slight Chance Showers And Thunderstorms | 0 to 10 mph SE | 20% |
| Friday Night | 76°F | Slight Chance Showers And Thunderstorms then Mostly Clear | 0 to 10 mph S | 20% |
| Saturday | 96°F | Sunny then Slight Chance Showers And Thunderstorms | 0 to 10 mph SE | 17% |
| Saturday Night | 77°F | Slight Chance Showers And Thunderstorms then Mostly Clear | 0 to 10 mph S | 17% |
| Sunday | 95°F | Sunny then Slight Chance Showers And Thunderstorms | 0 to 10 mph SE | 15% |
| Sunday Night | 77°F | Slight Chance Showers And Thunderstorms then Partly Cloudy | 0 to 10 mph S | 15% |
| Monday | 96°F | Mostly Sunny then Chance Showers And Thunderstorms | 0 to 10 mph S | 27% |
| Monday Night | 76°F | Chance Showers And Thunderstorms then Partly Cloudy | 5 to 10 mph S | 27% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Katy, TX
Last spring frost
Feb 2
First fall frost
Dec 11
Growing season
318 days
Hardiness zone
9a
Explore more for Katy, TX: full frost dates · planting calendar · Texas frost dates
Climate data from the nearest NOAA station, Houston Sugarland Mem, Tx (19.1 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.