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Lorton, VA Weather
Current conditions
Observed at Fort Belvoir · 1 hr ago
Forecast
10-day-
Overnight
Clear, with a low around 45. North wind 3 to 8 mph.
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Friday
Sunny, with a high near 64. Northeast wind around 8 mph.
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Friday Night
Clear, with a low around 40. Northeast wind 1 to 6 mph.
National Weather Service forecast updated 2 hrs ago.
Hourly
Hourly forecast- Now46°
- 4 AM46°
- 5 AM46°
- 6 AM45°
- 7 AM45°
- 8 AM46°
- 9 AM49°
- 10 AM54°
- 11 AM57°
- 12 PM60°
- 1 PM62°
- 2 PM63°
- 3 PM64°
- 4 PM63°
- 5 PM63°
- 6 PM61°
- 7 PM56°
- 8 PM52°
- 9 PM50°
- 10 PM49°
- 11 PM47°
- Sat12 AM46°
- 1 AM45°
- 2 AM44°
10-day forecast
Details- TonightOct 22Clear45°
- TodayOct 23Sunny40°64°
- SatOct 24Sunny39°64°
- SunOct 25Sunny40°67°
- MonOct 26Sunny48°70°
- TueOct 27Sunny47°67°
- WedOct 28Partly Sunny47°64°
- ThuOct 29Mostly Sunny68°
- FriOct 30Partly cloudy50°74°
- SatOct 31Cloudy51°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 Lorton
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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
MonthlyWashington Reagan National Airport, records since 1941. Normals 1991–2020. Data from NOAA's Regional Climate Centers (ACIS).
Nearby
- Washington 27 km
- Arlington 22 km
- Alexandria 19 km
- Germantown 52 km
- Silver Spring 36 km
- Centreville 23 km
- Waldorf 27 km
- Gaithersburg 49 km
- Rockville 43 km
- Dale City 10 km
- Bethesda 33 km
- Reston 31 km
Forecasters' discussion
From the National Weather Service office in LWX, issued 1 hr ago
What Has Changed
No significant changes to the forecast thinking overnight, but did add/fine tune the mention of frost the next couple nights.
Key Messages
- 1) Frost or freezing temperatures are possible in many areas tonight and again Saturday night.
- 2) Dry and seasonable conditions are likely to continue through much of next week.
Discussion
KEY MESSAGE 1...Frost or freezing temperatures are possible in many areas tonight and again Saturday night.
With a large area of Canadian high pressure building overhead the next 24 to 48 hours, conditions will likely become favorable for radiational cooling (light to calm winds, mainly clear skies and a cool background airmass). The coldest conditions are expected through early Sunday morning, with some moderation in temperatures thereafter.
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, temperatures look to fall into the mid 30s for many areas west of I-95, perhaps even into interior/rural southern MD. The typically colder spots of northern/north-central MD and the central VA piedmont could at least briefly come close to freezing. Will see what the latest guidance and trends have later this morning before making any headline decisions.
For Saturday night, more widespread cold (possible frost/freeze) conditions are apparent as high pressure settles more directly overhead. This would bring the frost/freeze threat for most areas outside the major urban centers and immediate shore of the Chesapeake Bay. If the colder temperature guidance verifies, then the growing season may end for all areas west I-95 come early Sunday morning.
Relied on a blend of MOS guidance and NBM 10th percentile for low temperatures the next couple of nights, even undercutting by a couple degrees in the typically colder locales.
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 or low clouds mainly during the early morning hours by later in the weekend, though confidence in timing and extent of sub-VFR is low at this time.
N winds with a few gusts to around 15 kts are expected just after daybreak until roughly 15Z, becoming NE this afternoon. Winds will be light to calm tonight. A more E flow is likely Saturday, with light to calm winds again Saturday night. Wind direction may be a bit variable, ranging from SE to NE as high pressure passes directly overhead Sunday. Light SE winds early Monday become NW by midday Monday, then N with a few gusts possible Tuesday as a backdoor cold front drops through.
It is possible that the first near-freezing temperatures of the season are observed particularly early Sunday morning for sites like CHO, IAD and BWI.
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.