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Bull Run, VA Weather
Current conditions
Observed at Washington Manassas Airport · 1 hr ago
Forecast
10-day-
Saturday
Patchy frost between 7am and 8am. Sunny, with a high near 63. Northeast wind around 3 mph.
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Saturday Night
Patchy fog between 10pm and 1am, then patchy frost and patchy fog. Clear, with a low around 33. Northeast wind around 2 mph.
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Sunday
Patchy frost and patchy fog before 10am. Sunny, with a high near 66. East wind around 2 mph.
National Weather Service forecast updated 1 day ago.
Hourly
Hourly forecast- Now62°
- 3 PM63°
- 4 PM62°
- 5 PM61°
- 6 PM57°
- 7 PM53°
- 8 PM47°
- 9 PM44°
- 10 PM41°
- 11 PM39°
- Sun12 AM38°
- 1 AM37°
- 2 AM37°
- 3 AM37°
- 4 AM37°
- 5 AM36°
- 6 AM34°
- 7 AM33°
- 8 AM35°
- 9 AM40°
- 10 AM48°
- 11 AM55°
- 12 PM60°
- 1 PM63°
10-day forecast
Details- FriOct 23Sunny37°64°
- TodayOct 24Patchy Frost then Sunny33°63°
- SunOct 25Patchy Frost then Sunny37°66°
- MonOct 26Sunny46°70°
- TueOct 27Sunny45°67°
- WedOct 28Partly Sunny45°64°
- ThuOct 29Mostly Sunny46°67°
- FriOct 30Partly cloudy51°67°
- SatOct 31Sunny41°57°
- SunNov 1Partly cloudy36°61°
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 Bull Run
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Air quality
Air quality is satisfactory, and air pollution poses little or no risk.
Forecast
- SatGood (44)
- SunModerate (53)
- MonGood (50)
Northern Virginia, VA reporting area · 2 hrs 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 44 km
- Arlington 38 km
- Alexandria 41 km
- Germantown 48 km
- Silver Spring 49 km
- Centreville 10 km
- Waldorf 53 km
- Gaithersburg 49 km
- Rockville 46 km
- Dale City 24 km
- Bethesda 42 km
- Reston 26 km
Forecasters' discussion
From the National Weather Service office in LWX, issued 3 hrs ago
What Has Changed
The Frost Advisory expired. Coastal Flood Advisories were issued for Anne Arundel, Calvert, Charles, and King George Counties through this afternoon's high tide. Minimal changes are needed to the forecast, but will be evaluating the extent of frost/freeze products needed for tonight.
Key Messages
- 1) Frost or freezing temperatures are possible in many areas tonight and Sunday night.
- 2) Dry weather continues through next week along with generally seasonable temperatures.
Discussion
KEY MESSAGE 1...Frost or freezing temperatures are possible in many areas tonight and Sunday night.
With a large area of Canadian high pressure building overhead through the weekend, conditions are favorable for radiational cooling (light to calm winds, mainly clear skies and a cool background airmass). At the moment, it is unclear which night will be the coldest, although tonight (Saturday night) will have a slight advantage given the position of the high overhead.
The growing season for 2026 has ended along and west of the Blue Ridge and Catoctin Mountains, but continues east of there. Any headlines for frost/freeze conditions will only be issued where the growing season remains active.
For tonight, more widespread cold (possible frost/freeze) conditions are possible as high pressure settles more directly overhead. This would bring the frost/freeze threat for most areas outside the major urban centers (downtown DC/Baltimore) and immediate shore of the Chesapeake Bay. If the colder guidance verifies, then the growing season may end for more areas west of I-95 come early Sunday morning. The high will remain overhead through Monday morning, and while the low-level airmass doesn't change appreciably, temperatures will start warming aloft. Therefore frost/freeze coverage may be more limited Sunday night, but still a risk in low lying areas.
Did not make appreciable changes to the previous min temperature forecasts, which are near or below the coldest guidance which performs best in radiational cooling (MOS, NBM 10 percentile and Canadian Regional).
KEY MESSAGE 2...Dry weather continues through next week along with generally seasonable temperatures.
Aviation
VFR conditions are expected to prevail through early next week. There are some hints that a slight uptick in low-level moisture could lead to some patchy fog during the early morning hours through the weekend, though confidence in timing and extent of sub-VFR is low at this time. The NAM and related guidance is by far the most aggressive with this outcome, but is an outlier.
E to SE flow is expected today, with light to calm winds again tonight. Wind direction may be a bit variable, ranging from SE to NE as high pressure passes directly overhead Sunday.
P6SM SKC as high pressure dominates early next week. A dry cold front will cross the area late Monday night with winds shifting to N/NW Tuesday.
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 4Search index and reflects what the press published. Terms of use.