Weather
Northern Virginia Frost Alert Tonight: Lows Near 33° by Morning Oct 20
Manassas, VA – Residents across portions of Northern Virginia are being urged to protect sensitive outdoor plants tonight as a newly issued Frost Advisory warns of temperatures falling close to freezi
By Cameron Hayes · 2026-10-20T03:13:25.050Z
Manassas, VA – Residents across portions of Northern Virginia are being urged to protect sensitive outdoor plants tonight as a newly issued Frost Advisory warns of temperatures falling close to freezing early Tuesday morning, October 20.
According to the National Weather Service Baltimore/Washington office, the advisory was issued at 8:44 p.m. Monday and will remain in effect from 1 a.m. until 9 a.m. EDT Tuesday , with temperatures potentially dropping to 33 degrees.
The overnight cold could produce frost across several communities southwest of Washington, D.C., threatening gardens, flowers and other vulnerable vegetation.
Which Northern Virginia Communities Are Affected? The Frost Advisory covers Orange and Culpeper counties, southern Fauquier County, and central and southeastern Prince William County, including Manassas and Manassas Park.
Communities specifically identified by the National Weather Service include:
Manassas, Manassas Park and Woodbridge Dale City, Lake Ridge and Montclair Culpeper, Stevensburg and Reva Orange, Rapidan and Unionville Independent Hill and surrounding communities Forecasters warn that frost could develop during the coldest overnight hours, even where air temperatures remain slightly above freezing.
Temperatures Near Freezing Could Damage Plants The National Weather Service warns that frost could harm sensitive outdoor vegetation, with some plants potentially killed if left uncovered.
Residents are encouraged to bring potted plants indoors or cover tender vegetation before temperatures fall overnight.
Late season gardens, flowers and other cold sensitive plants may be particularly vulnerable.
When Will the Frost Advisory End? The advisory is scheduled to expire at 9 a.m. Tuesday, October 20 , as temperatures begin recovering after sunrise.
The advisory does not include all of Northern Virginia, and conditions may vary between nearby communities.
Residents should monitor updated forecasts and any changes to the advisory through the National Weather Service Baltimore/Washington office .