Katy, TX Weather Forecast
Local 7-day forecast
Patchy Fog then Mostly Sunny
Track current conditions, temperature changes, wind, and the full daily outlook for Katy, TX in one place.
Patchy fog before 8am. Mostly sunny, with a high near 100. Heat index values as high as 106. South wind 5 to 10 mph.
Local Weather Overview
This forecast page for Katy, TX is designed for quick trip planning, giving you a clean read on daytime highs, overnight lows, and changing conditions across the upcoming forecast window. Latest sync: Aug 21, 2026 10:15 PM CDT.
The active forecast window currently covers Aug 23 to Aug 28, 2026 for Katy, TX.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Aug 23 to Aug 28, 2026
- Latest sync
- Aug 21, 2026 10:15 PM CDT
- Forecast office
- HGX
- Source
- NOAA / NWS
Daily Outlook
This Week in Katy
Monday looks like the warmest upcoming period in Katy at 101 degrees F.
Monday Night is the coolest period ahead with temperatures near 78 degrees F.
The strongest winds are forecast for Tuesday Night at about 5 to 15 mph S.
Precipitation is mentioned in 2 upcoming forecast periods.
Forecast Details
- Last updated
- Aug 21, 2026 10:15 PM CDT
- Coverage
- 6 days
- Time zone
- America/Chicago
- Forecast office
- HGX
- Radar station
- KHGX
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
Mostly clear, with a low around 79. South wind 5 to 10 mph.
Sunny, with a high near 101.
Mostly clear, with a low around 78.
Sunny, with a high near 101.
Clear, with a low around 78.
Sunny, with a high near 101.
Mostly clear, with a low around 78.
Sunny, with a high near 100.
A slight chance of showers and thunderstorms between 7pm and 1am. Mostly clear, with a low around 78. Chance of precipitation is 20%.
A slight chance of showers and thunderstorms between 7am and 1pm. Sunny, with a high near 99.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Sunday
Aug 23
|
Patchy Fog then Mostly Sunny
|
100°F |
5 to 10 mph
S
|
|
Sunday Night
Aug 23
|
Mostly Clear
|
79°F |
5 to 10 mph
S
|
|
Monday
Aug 24
|
Sunny
|
101°F |
5 to 10 mph
SW
|
|
Monday Night
Aug 24
|
Mostly Clear
|
78°F |
5 to 10 mph
S
|
|
Tuesday
Aug 25
|
Sunny
|
101°F |
5 to 10 mph
S
|
|
Tuesday Night
Aug 25
|
Clear
|
78°F |
5 to 15 mph
S
|
|
Wednesday
Aug 26
|
Sunny
|
101°F |
5 mph
S
|
|
Wednesday Night
Aug 26
|
Mostly Clear
|
78°F |
5 to 10 mph
S
|
|
Thursday
Aug 27
|
Sunny
|
100°F |
5 mph
SW
|
|
Thursday Night
Aug 27
|
Slight Chance Showers And Thunderstorms
|
78°F |
5 to 10 mph
S
|
|
Friday
Aug 28
|
Slight Chance Showers And Thunderstorms
|
99°F |
0 to 10 mph
S
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Katy.
