Houston, Texas Weather:
Active Weather Warnings
Friday, August 21, 2026
Cloudy Weather
Day 100°
Night 81°
Precipitation 11 %
Wind 7 mph
UV Index (0 - 11+) 10
Weather Forecast History
Last Year's Weather on This Day (August 21, 2025)
Stormy Weather

Day

93°

Night

75°

Wind

6 mph

Precipitation

88 %

Weather Alerts and Warnings for

Moderate Expected Likely

Heat Advisory

Heat Advisory issued August 19 at 11:55AM CDT until August 21 at 7:00PM CDT by NWS Houston/Galveston TX
Aug 20, 12:00 PM Aug 21, 7:00 PM
WHAT: Heat index values between 106 and 110 expected.

WHERE: Portions of south central and southeast Texas.

WHEN: From noon Thursday to 7 PM CDT Friday.

IMPACTS: Hot temperatures and high humidity may cause heat
illnesses.

ADDITIONAL DETAILS: This advisory may need to be extended into the
weekend.
+ Read More
Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Take extra precautions when outside. Wear lightweight and loose fitting clothing. Try to limit strenuous activities to early morning or evening. Take action when you see symptoms of heat exhaustion and heat stroke.
Updated: Aug 19, 8:42 PM Source: NWS Alert