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Heat Advisory HEAT ADVISORY - Houston  - Richmond

NWS Southern Plains Regional Radar WU South Central Satellite
Radar/Satellite images courtesy of NOAA/NWS and Weather Underground.
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Updated: @ 21-Aug-2026 4:27pm  
Summary / Temperature Wind Rain Outlook
Clear Clear
Currently: 100.6, Max: 101.7, Min: 75.9 100.6°F
Warmer 1.5°F than last hour.

Heat Danger

Feels like: 122°F

24-hr difference
2.2°FWarmer 2.2°F than yesterday at this time.
  Today Yesterday
High: 101.7°F
3:10pm 		99.7°F
4:00pm
Low: 75.9°F
5:30am 		73.8°F
6:20am
Wind from SSE SSE
2.2
Gust:
 5.8 mph
1 Bft - Light air
Today: 10.3 mph 10:20am
Rain Today: 0 in
Rain Rate (/hr): 0 in
Rain Yesterday: 0 in
Storm Rain: 0 in
This Month: 0.45 in
Season Total: 36.57 in
7 days since last rain.
Tonight

Tonight: Slight Chance Showers And Thunderstorms then Patchy Fog
Slight Chance Showers And T-Storms then Patchy Fog
Humidity & Barometer Almanac Moon
Humidity: 52 % Decreased 2.0% since last hour.
Dew Point: 79.7°F Increased 0.2°F since last hour.
Barometer: 29.95 inHg Falling 0.02 inHg/hr
Baro Trend: Steady
Sunrise: 6:54am
Sunset: 7:57pm
Moonset: 12:49am
Moonrise: 3:39pm
Waxing Gibbous
Waxing Gibbous, Moon at 9 days in cycle
67%
Illuminated
UV Index Solar Radiation
   5     Medium 
High: 7 @ 10:50am
516.13 W/m2
High: 802.89 @  11:20am
 NWS Weather Forecast  - Outlook: This Afternoon & Tonight
This
Afternoon
This Afternoon: Slight Chance Showers And Thunderstorms
Slight Chance Showers And T-Storms

Hi 100 °F		 NWS forecast: A slight chance of showers and thunderstorms. Sunny, with a high near 100. Heat index values as high as 111. South wind around 5 mph. Chance of precipitation is 20%.
 
Tonight

Tonight: Slight Chance Showers And Thunderstorms then Patchy Fog
Slight Chance Showers And T-Storms then Patchy Fog

Lo 78 °F		 NWS forecast: A slight chance of showers and thunderstorms before 7pm, then patchy fog. Mostly clear, with a low around 78. Heat index values as high as 109. South wind 5 to 10 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.