NimbocastHerndon, VA Weather
Live radar, hourly and 7-day forecast, and National Weather Service alerts for Herndon, Fairfax County, Virginia.
Updated Jul 29, 2026, 5:05 PM local time · Radar refreshes every 5 minutes
🌤️
Herndon
81°F
Wind 14 mph
Humidity 46%
Cloud cover 32%
UV index 7
Alerts 0
Active alerts
✓
No active National Weather Service alerts for Herndon, VA.
Herndon weather radar
Light
Heavy
Next 24 hours
Now
🌤️
81°F
6 PM
⛅
80°F
7 PM
☀️
80°F
1%
8 PM
☁️
77°F
2%
9 PM
⛅
74°F
1%
10 PM
⛅
72°F
5%
11 PM
☁️
72°F
1%
12 AM
☁️
72°F
1 AM
☀️
70°F
2 AM
☀️
68°F
3 AM
☀️
66°F
4 AM
☀️
65°F
5 AM
☀️
64°F
6 AM
☀️
63°F
7 AM
☀️
64°F
8 AM
☀️
68°F
9 AM
☀️
71°F
10 AM
☀️
74°F
11 AM
☀️
78°F
12 PM
☀️
80°F
1 PM
🌤️
82°F
2 PM
⛅
83°F
3 PM
⛅
83°F
4 PM
🌤️
83°F
1%
7-day forecast
Today
Jul 29
☁️
83°F
68°F
5%
Thu
Jul 30
☁️
84°F
63°F
2%
Fri
Jul 31
☁️
88°F
65°F
1%
Sat
Aug 1
☁️
93°F
69°F
12%
Sun
Aug 2
🌦️
84°F
74°F
45%
Mon
Aug 3
🌦️
78°F
70°F
45%
Tue
Aug 4
☁️
78°F
67°F
22%
Weather near Herndon
2 mi
Reston, VA3 mi
Oak Hill, VA3 mi
Sterling, VA6 mi
Chantilly, VA6 mi
Wolf Trap, VA6 mi
Great Falls, VA7 mi
Ashburn, VA7 mi
South Riding, VA
Alerts are relayed from the National Weather Service and may lag
the official source. In a life-threatening situation always follow
weather.gov and local emergency
broadcasts.