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Herndon, VA 20171 Weather
Current conditions
Forecast for this hour (no station report in the last two hours)
Forecast
10-day-
Thursday
Sunny, with a high near 64. Northwest wind 6 to 10 mph, with gusts as high as 20 mph.
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Thursday Night
Clear, with a low around 43. North wind around 8 mph.
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Friday
Sunny, with a high near 60. North wind 5 to 8 mph.
National Weather Service forecast updated 23 hrs ago.
Hourly
Hourly forecast- Now51°
- 11 AM56°
- 12 PM59°
- 1 PM61°
- 2 PM63°
- 3 PM64°
- 4 PM64°
- 5 PM63°
- 6 PM61°
- 7 PM58°
- 8 PM54°
- 9 PM53°
- 10 PM52°
- 11 PM51°
- Fri12 AM50°
- 1 AM49°
- 2 AM48°
- 3 AM47°
- 4 AM46°
- 5 AM45°
- 6 AM44°
- 7 AM43°
- 8 AM43°
- 9 AM46°
Daily forecast
Details- WedOct 21Sunny41°63°
- TodayOct 22Sunny43°64°
- FriOct 23Sunny36°60°
- SatOct 24Patchy Frost then Sunny39°60°
- SunOct 25Sunny42°64°
- MonOct 26Sunny47°68°
- TueOct 27Mostly Sunny46°66°
- WedOct 28Cloudy0.02 in51°65°
- ThuOct 29Partly cloudy44°57°
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
Air quality is satisfactory, and air pollution poses little or no risk.
Forecast
- ThuGood (28)
- FriGood (33)
- SatGood (39)
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 25 km
- Alexandria 33 km
- Columbia 59 km
- Germantown 29 km
- Silver Spring 33 km
- Centreville 10 km
- Frederick 54 km
- Waldorf 52 km
- Gaithersburg 29 km
- Rockville 27 km
- Dale City 33 km
Forecasters' discussion
From the National Weather Service office in LWX, issued 6 hrs ago
What Has Changed
Lowered the dew points through Saturday afternoon with NBM being too high each afternoon. Otherwise, no significant changes were made to the forecast.
Key Messages
- 1) Dry conditions and seasonable temperatures through early next week, with frost possible this weekend.
Discussion
KEY MESSAGE 1...Dry conditions and seasonable temperatures through early next week, with frost possible this weekend.
Surface high pressure remains to the north through Saturday with dry conditions and seasonal temperatures expected to continue. High temperatures today will be in the 60s for most with only highest elevations staying in the 50s. Tonight, 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 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
North winds continue today with terminals near the metros gusting 15 to 20 knots this afternoon. 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.
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.