National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

La Porte Municipal Airport (KT41)

Lat: 29.67°NLon: 95.06°WElev: 25ft.

Fair

95°F

35°C

Humidity 47%
Wind Speed SW 3 mph
Barometer 30.04 in
Dewpoint 72°F (22°C)
Visibility 10.00 mi
Heat Index103°F (39°C)
Last update 21 Aug 2:15 pm CDT
Extended Forecast for

Mont Belvieu TX

Heat Advisory August 21, 02:36pm until August 22, 07:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory August 21, 02:36pm until August 22, 07:00pm

    NOW until 7:00pm Sat

    Heat Advisory

  • This Afternoon

    High: 97 °F

    Slight Chance
    T-storms

  • Tonight

    Tonight: A 20 percent chance of showers and thunderstorms, mainly between 10pm and 4am. Partly cloudy, with a low around 79. South wind 5 to 10 mph.

    Low: 79 °F

    Slight Chance
    T-storms

  • Saturday

    Saturday: A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny and hot, with a high near 98. Heat index values as high as 109. Southwest wind 5 to 10 mph becoming south in the afternoon.

    High: 98 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Saturday Night

    Saturday Night: A 20 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 78. South wind 5 to 10 mph.

    Low: 78 °F

    Slight Chance
    T-storms

  • Sunday

    Sunday: Sunny, with a high near 97. Southwest wind 5 to 10 mph becoming south in the afternoon.

    High: 97 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 79.

    Low: 79 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 96.

    High: 96 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 79.

    Low: 79 °F

    Mostly Clear

Detailed Forecast

This Afternoon
A 20 percent chance of showers and thunderstorms after 4pm. Sunny, with a high near 97. Heat index values as high as 110. South wind 5 to 10 mph.
Tonight
A 20 percent chance of showers and thunderstorms, mainly between 10pm and 4am. Partly cloudy, with a low around 79. South wind 5 to 10 mph.
Saturday
A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny and hot, with a high near 98. Heat index values as high as 109. Southwest wind 5 to 10 mph becoming south in the afternoon.
Saturday Night
A 20 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 78. South wind 5 to 10 mph.
Sunday
Sunny, with a high near 97. Southwest wind 5 to 10 mph becoming south in the afternoon.
Sunday Night
Mostly clear, with a low around 79.
Monday
Sunny, with a high near 96.
Monday Night
Mostly clear, with a low around 79.
Tuesday
Sunny, with a high near 96.
Tuesday Night
Clear, with a low around 79.
Wednesday
Sunny, with a high near 96.
Wednesday Night
Mostly clear, with a low around 79.
Thursday
A 20 percent chance of showers and thunderstorms. Sunny, with a high near 95.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Mont Belvieu TX
 29.86°N 94.87°W (Elev. 39 ft)
Last Update:
1:21 pm CDT Aug 21, 2026
Forecast Valid:
2pm CDT Aug 21, 2026-6pm CDT Aug 27, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation