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Herndon, VA 20172 Weather
Current conditions
Observed at Washington/Dulles International Airport, DC · 1 hr ago
Forecast
10-day-
Tonight
Clear, with a low around 44. North wind around 7 mph.
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Friday
Sunny, with a high near 63. Northeast wind around 7 mph.
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Friday Night
Mostly clear, with a low around 38. Northeast wind 1 to 5 mph.
National Weather Service forecast updated 4 hrs ago.
Hourly
Hourly forecast- Now47°
- 1 AM46°
- 2 AM46°
- 3 AM46°
- 4 AM46°
- 5 AM47°
- 6 AM46°
- 7 AM46°
- 8 AM46°
- 9 AM48°
- 10 AM53°
- 11 AM57°
- 12 PM60°
- 1 PM61°
- 2 PM62°
- 3 PM63°
- 4 PM62°
- 5 PM61°
- 6 PM60°
- 7 PM55°
- 8 PM50°
- 9 PM48°
- 10 PM46°
- 11 PM45°
10-day forecast
Details- TonightOct 22Clear44°
- TodayOct 23Sunny38°63°
- SatOct 24Sunny40°63°
- SunOct 25Sunny41°65°
- MonOct 26Sunny47°68°
- TueOct 27Sunny46°67°
- WedOct 28Partly Sunny48°64°
- ThuOct 29Mostly Sunny66°
- FriOct 30Cloudy50°74°
- SatOct 31Cloudy49°63°
Days after the National Weather Service's seven are MET Norway's outlook, a computer model with no forecaster's review.
Radar
Full mapWeather news near Herndon
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Air quality
Acceptable. Unusually sensitive people should consider limiting prolonged outdoor exertion.
Forecast
- FriGood (33)
- SatGood (44)
- SunModerate (53)
Northern Virginia, VA reporting area · 1 hr ago. Data from AirNow (EPA and its state, local and tribal partners); preliminary and subject to change.
Sun & moon
Almanac
MonthlySterling-Dulles Airport Area, records since 1960. Normals 1991–2020. Data from NOAA's Regional Climate Centers (ACIS).
Nearby
- Washington 31 km
- Arlington 26 km
- Alexandria 35 km
- Columbia 56 km
- Germantown 25 km
- Silver Spring 31 km
- Centreville 15 km
- Frederick 49 km
- Waldorf 55 km
- Gaithersburg 25 km
- Rockville 24 km
- Dale City 38 km
Forecasters' discussion
From the National Weather Service office in LWX, issued 3 hrs ago
What Has Changed
No changes needed. Coastal flooding advisories remain in effect for many locations. Check the latest CFW for updates. Also, see the marine forecast discussion below for details about the small craft advisories into Friday.
Key Messages
- 1) Dry and seasonable conditions continue through early next week, with frost possible this weekend.
Discussion
KEY MESSAGE 1...Dry and seasonable conditions continue through early next week, with frost possible this weekend.
Surface high pressure remains to the north through Saturday with dry and seasonable conditions expected to continue. Tonight's low temperatures will be in the upper 30s to 40s. For Friday and Saturday, surface high pressure extends southward from Canada with dry cold fronts bringing in cooler air. High temperatures stay in the 50s to low 60s while overnight lows plummet into the 30s for most. The exception will be east of the I-95 corridor where low temperatures stay in the low 40s. Frost is possible Friday night and Saturday night.
High pressure will continue to build southward into the region Sunday through Tuesday. Dry conditions and seasonable temperatures expected each day with light north to east winds. A backdoor cold front could try to push into the region Tuesday into Tuesday night, but will have very little to no moisture with it to produce any precipitation. A surge of cooler temperatures will follow behind the front for the day on Wednesday.
Aviation
Winds become light overnight before shifting to northeast on Friday. Winds blow 5 to 10 knots on Friday before becoming light and variable overnight. On Saturday, winds shift to easterly, remaining light throughout the day. VFR conditions are expected each day.
VFR conditions Sunday through Monday night. Winds light and variable through the period as high pressure sits overhead. Winds then turn out of the NNE on Tuesday AOB 10 knots for the most part.
Forecasts, observations and alerts in the United States come from the National Weather Service (NOAA); radar from NOAA's Multi-Radar Multi-Sensor system; satellite imagery from NASA's Global Imagery Browse Services (GIBS) and NOAA's GOES satellites; the map from the U.S. Geological Survey's National Map; air quality from AirNow (EPA and its partners); hurricane information from the National Hurricane Center; climate normals and records from NOAA's Regional Climate Centers (ACIS). Forecasts outside the United States and the UV index: MET Norway (CC BY 4.0); observations outside the U.S.: airport reports via NOAA's Aviation Weather Center. Place names: GeoNames (CC BY 4.0). Data are copied on a schedule and may lag the sources; for warnings that affect your safety, follow your local National Weather Service office and emergency officials. Weather news is drawn from the 4Conservative index and reflects what the press published. Terms of use.