HERNDON, VA 20170 Weather Forecast & Current Conditions

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WASH-DULLES, VA
Current Weather

3:52 AM EDT JUN 21, 2025
Broken Clouds
68°F
Feels Like: 68°F
Dewpoint: 64°F
Rel. Hum.: 87%
Visibility: 10 miles
Wind: Calm
Pressure: 30.09 inches
Last 72 hours

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HERNDON, VA 20170
Weather Forecast

Snowfall Forecast pages
Snow Depth pages
REST OF THE OVERNIGHT
Partly cloudy. Lows in the mid 60s. Light and variable winds.
TODAY
Sunny. Highs in the lower 90s. Light and variable winds, becoming southwest around 5 mph in the afternoon.
TONIGHT
Mostly clear. Lows in the lower 70s. South winds around 5 mph.
SUNDAY
Sunny, hot with highs in the upper 90s. Southwest winds around 5 mph.
SUNDAY NIGHT
Mostly clear. Lows in the mid 70s. Southwest winds around 5 mph.
MONDAY
Sunny, hot with highs in the upper 90s. Heat index values up to 110.
MONDAY NIGHT
Mostly clear. Lows in the upper 70s.
TUESDAY
Sunny, hot with highs around 100.
TUESDAY NIGHT
Partly cloudy. Lows in the upper 70s.
WEDNESDAY
Mostly sunny. Hot with highs in the upper 90s.
WEDNESDAY NIGHT
Partly cloudy. Lows in the mid 70s.
THURSDAY
Mostly sunny with a chance of showers and thunderstorms. Hot with highs in the mid 90s. Chance of rain 30 percent.
THURSDAY NIGHT
Mostly cloudy with a chance of showers and thunderstorms. Lows in the mid 70s. Chance of rain 30 percent.

Visible Weather Satellite
HERNDON, VA 20170
Infrared Weather Satellite
HERNDON, VA 20170
NEXRAD Weather Radar
HERNDON, VA 20170

WASH-DULLES, VA 3 hourly weather forecast

weather forecast created  7:00 PM CDT  6/20/2025
Saturday
21 JUN 2025
HERNDON, VA 20170 weather forecast Day 1, 0 hours 2 AM 70° 70° Partly Cloudy 2%

0% Thunder
( 1% severe)
SW   1 81% 64°
Low 66° HERNDON, VA 20170 weather forecast Day 1, 3 hours 5 AM 67° 67° Clear   CALM 90% 64°
High 90° HERNDON, VA 20170 weather forecast Day 1, 6 hours 8 AM 73° 73° Clear 1%

0% Thunder
( 1% severe)
  CALM 79% 66°

Partly Cloudy



HERNDON, VA 20170 weather forecast Day 1, 9 hours 11 AM 84° 86° Clear SW   2 55% 66°
HERNDON, VA 20170 weather forecast Day 1, 12 hours 2 PM 88° 89° Partly Cloudy 2%

0% Thunder
( 11% severe)
SSW   5 45% 64°
HERNDON, VA 20170 weather forecast Day 1, 15 hours 5 PM 89° 91° Partly Cloudy SSW   7 44% 64°
HERNDON, VA 20170 weather forecast Day 1, 18 hours 8 PM 84° 86° Clear 2%

0% Thunder
( 8% severe)
S   7 55% 66°
HERNDON, VA 20170 weather forecast Day 1, 21 hours 11 PM 78° 80° Clear S   7 67% 66°
Sunday
22 JUN 2025
HERNDON, VA 20170 weather forecast Day 2, 0 hours 2 AM 75° 75° Clear 1%

0% Thunder
( 1% severe)
SSW   8 76% 67°
Low 71° HERNDON, VA 20170 weather forecast Day 2, 3 hours 5 AM 72° 72° Clear SSW   7 81% 66°
High 96° HERNDON, VA 20170 weather forecast Day 2, 6 hours 8 AM 76° 77° Clear 0%

0% Thunder
( 2% severe)
SSW   5 79% 69°

Clear



HERNDON, VA 20170 weather forecast Day 2, 9 hours 11 AM 88° 93° Clear SW   6 54% 69°
HERNDON, VA 20170 weather forecast Day 2, 12 hours 2 PM 93° 97° Clear 0%

0% Thunder
( 14% severe)
SW   6 44% 68°
HERNDON, VA 20170 weather forecast Day 2, 15 hours 5 PM 95° 101° Partly Cloudy SW   8 43% 69°
HERNDON, VA 20170 weather forecast Day 2, 18 hours 8 PM 89° 94° Clear 0%

0% Thunder
( 10% severe)
SSW   7 54% 70°
HERNDON, VA 20170 weather forecast Day 2, 21 hours 11 PM 83° 88° Clear SW   5 67% 71°

WASH-DULLES, VA extended weather forecast

Monday
23 JUN 2025
Tuesday
24 JUN 2025
Wednesday
25 JUN 2025
Thursday
26 JUN 2025
Friday
27 JUN 2025
Low 72° Low 74° Low 72° Low 72° Low 72°
High 100° High 99° High 97° High 97° High 94°
HERNDON, VA 20170 weather forecast Day 3 HERNDON, VA 20170 weather forecast Day 4 HERNDON, VA 20170 weather forecast Day 5 HERNDON, VA 20170 weather forecast Day 6 HERNDON, VA 20170 weather forecast Day 7
Clear
4% Rain
Partly Cloudy
38% Rain
Partly Cloudy
31% Rain
Partly Cloudy
27% Rain
Mostly Cloudy
42% Rain
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