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 Details for Fairfax Extreme Heat Warning  +1 additional alert
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Extreme Heat Warning EXTREME HEAT WARNING - Fairfax  - Hanover
Air Quality Alert AIR QUALITY ALERT - Fairfax

Regional Radar Regional Infrared Satellite
Radar/Satellite images courtesy of Weather Underground.
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Updated: @ 04-Jul-2026 1:40am  
Summary / Temperature Wind Rain Outlook
Clear Clear
Currently: [actual_th0_temp_f], Max: 102.6, Min: 79.9 0°F
 

Very Cold

Feels like: -0°F

  Today Yesterday
High: 102.6°F
3:09pm 		102.6°F
3:09pm
Low: 79.9°F
7:20am 		79.9°F
7:20am
Calm [actual_wind0_dir_en]
0
Gust:
 0 mph
0 Bft - Calm
Today: 8.1 mph 4:50pm
Gust Month: 8.9 mph July 01
Rain Today: 0 in
Rain Rate (/hr): 0 in
Rain Yesterday: 0 in
This Month: 0.01 in
Season Total: 3.34 in
day since last rain.
Independence
Day
Independence Day: Mostly Sunny then Chance Showers And Thunderstorms
Mostly Sunny then Chance Showers And T-Storms
Humidity & Barometer Almanac Moon
Humidity: [actual_th0_hum_rel] %  
Dew Point: 0°F  
Barometer: 29.89 inHg  
Baro Trend: Steady
Sunrise: 5:49am
Sunset: 8:38pm
Moonset: 10:09am
Moonrise: 11:27pm
Waning Gibbous
Waning Gibbous, Moon at 18 days in cycle
84%
Illuminated
UV Index Forecast UV Index Forecast
04-Jul-2026
9.4     Very High 
05-Jul-2026
9.9     Very High 
 NWS Weather Forecast  - Outlook: Overnight & Independence Day
Overnight

Overnight: Mostly Clear
Mostly Clear

Lo 78 °F		 NWS forecast: Mostly clear, with a low around 78. Northwest wind around 5 mph. New rainfall amounts less than a tenth of an inch possible.
Davis VP+ forecast: Increasing clouds with little temperature change.
 
Independence
Day
Independence Day: Mostly Sunny then Chance Showers And Thunderstorms
Mostly Sunny then Chance Showers And T-Storms

Hi 99 °F		 NWS forecast: A chance of showers and thunderstorms after 2pm. Mostly sunny. High near 99, with temperatures falling to around 91 in the afternoon. Heat index values as high as 106. West wind 2 to 9 mph, with gusts as high as 20 mph. Chance of precipitation is 50%. New rainfall amounts less than a tenth of an inch possible.