Texas · NWS HGX office

Katy, TX weather

It is 68°F and clear at Houston, Sugar Land Municipal / Hull Field Airport as of Oct 28, 1:00 AM CDT. Overnight: Mostly Cloudy, low near 66°F, 11% chance of precipitation. Forecast from the National Weather Service, issued Oct 28, 1:21 AM CDT.

Updated Oct 28, 1:28 AM CDT (snapshot)

Current conditions

Temperature

68°F

Clear

Wind

Calm

Humidity 100% · dew point 68°F

Pressure · visibility

30.13 inHg

Visibility 10 mi

Observed at Houston, Sugar Land Municipal / Hull Field Airport (KSGR), Oct 28, 1:00 AM CDT. Station readings can lag or be missing.

Alerts for this area

No active NWS alerts cover the Katy forecast zone right now.

Around the NWS HGX forecast area

No active alerts in zones served by the HGX office near Katy.

From the alert snapshot of Oct 28, 2026, 2:15 AM EDT. Texas has 2 active alerts: see them all.

For official warnings, check weather.gov and your local authorities. OpenForecast repeats National Weather Service alerts and may be delayed or incomplete. Follow instructions from emergency officials.

Next 24 hours

Hourly forecast for Katy (local time)
TimeTempForecastPrecip. chanceWind
Wed 1 AM66°FMostly Cloudy8%E 5 mph
Wed 2 AM66°FMostly Cloudy8%E 5 mph
Wed 3 AM66°FMostly Cloudy9%E 5 mph
Wed 4 AM66°FMostly Cloudy9%E 5 mph
Wed 5 AM66°FMostly Cloudy11%E 5 mph
Wed 6 AM67°FCloudy14%E 5 mph
Wed 7 AM67°FSlight Chance Rain Showers15%E 5 mph
Wed 8 AM67°FSlight Chance Rain Showers15%E 5 mph
Wed 9 AM69°FSlight Chance Rain Showers15%E 5 mph
Wed 10 AM73°FSlight Chance Rain Showers16%E 5 mph
Wed 11 AM76°FSlight Chance Rain Showers16%SE 10 mph
Wed 12 PM77°FSlight Chance Rain Showers16%SE 10 mph
Wed 1 PM80°FChance Showers And Thunderstorms29%SE 10 mph
Wed 2 PM80°FChance Showers And Thunderstorms29%SE 10 mph
Wed 3 PM80°FChance Showers And Thunderstorms29%SE 10 mph
Wed 4 PM80°FChance Showers And Thunderstorms31%SE 10 mph
Wed 5 PM79°FChance Showers And Thunderstorms31%SE 10 mph
Wed 6 PM77°FChance Showers And Thunderstorms31%SE 5 mph
Wed 7 PM77°FMostly Cloudy6%SE 5 mph
Wed 8 PM72°FMostly Cloudy6%SE 5 mph
Wed 9 PM70°FMostly Cloudy6%SE 5 mph
Wed 10 PM69°FMostly Cloudy5%SE 5 mph
Wed 11 PM67°FMostly Cloudy5% 0 mph
Thu 12 AM67°FPartly Cloudy5% 0 mph

Hourly values come from the NWS gridded forecast for the 2.5 km grid square that covers the city's center point. Conditions elsewhere in Katy can differ.

7-day forecast

Overnight

Low 66°F

Mostly cloudy, with a low around 66. East wind around 5 mph.

Wednesday

High 82°F·Low 62°F

A slight chance of rain showers between 7am and 1pm, then a chance of showers and thunderstorms. Mostly cloudy. High near 82, with temperatures falling to around 79 in the afternoon. East wind 5 to 10 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.

Wednesday Night: A chance of showers and thunderstorms before 7pm. Mostly cloudy, with a low around 62. East wind 0 to 5 mph. Chance of precipitation is 30%.

Thursday

High 83°F·Low 62°F

Mostly sunny, with a high near 83. East wind 0 to 5 mph.

Thursday Night: Mostly cloudy, with a low around 62. East wind 0 to 5 mph.

Friday

High 80°F·Low 66°F

A slight chance of rain showers after 1pm. Partly sunny, with a high near 80. Chance of precipitation is 20%.

Friday Night: A slight chance of rain showers. Mostly cloudy, with a low around 66. Chance of precipitation is 20%.

Saturday

High 82°F·Low 65°F

A slight chance of rain showers before 1pm, then a chance of showers and thunderstorms. Partly sunny, with a high near 82. Chance of precipitation is 50%.

Saturday Night: A chance of showers and thunderstorms before 7pm. Partly cloudy, with a low around 65. Chance of precipitation is 50%.

Sunday

High 83°F·Low 65°F

Partly sunny, with a high near 83.

Sunday Night: Mostly cloudy, with a low around 65.

Monday

High 84°F·Low 66°F

Partly sunny, with a high near 84.

Monday Night: A slight chance of rain showers before midnight, then a chance of showers and thunderstorms. Partly cloudy, with a low around 66. Chance of precipitation is 40%.

Tuesday

High 80°F

A chance of showers and thunderstorms. Partly sunny, with a high near 80.

Nearby cities

Larger cities in the area

Other cities in Harris County

See every city we cover in Texas, or check all active alerts.

About this forecast

Forecast office
Katy is served by the National Weather Service HGX forecast office, forecast zone TXZ212, county zone TXC473.
Location used
The Census Bureau's internal point for Katy (29.7909, -95.8407), in Harris County. Population: 27,741 (2024 estimate), number 119 of the 154 Texas cities on this site.
Radar
Nearest NWS radar: KHGX. View it on radar.weather.gov.

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Sources

  • Forecast, hourly forecast, observations and alerts: National Weather Service API, api.weather.gov/points/29.7909,-95.8407 (forecast issued Oct 28, 1:21 AM CDT).
  • Official forecast page: forecast.weather.gov.
  • City location and population: U.S. Census Bureau, Vintage 2024 population estimates and 2024 Gazetteer files.
  • Snapshot taken Oct 28, 2026. The NWS and Census Bureau do not endorse OpenForecast.

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