Frost Advisory
Starts in 7 h 29 min
When
From 1 AM to 9 AM EDT Monday.
Where
Portions of central and northern Maryland, and central and northern Virginia.
Issued for this forecast zone · National Weather Service Baltimore MD/Washington DC
What, impacts and precautionsHide details
What
Temperatures as low as 33 will result in frost formation.
Impacts
Frost could harm sensitive outdoor vegetation. Sensitive outdoor plants may be killed if left uncovered.
Additional details
The lowest temperatures and subsequent frost potential are expected in valleys and other low lying locations.
Precautionary actions
Take steps now to protect tender plants from the cold.
Areas: Carroll; Northern Baltimore; Cecil; Northwest Montgomery; Central and Southeast Montgomery; Northwest Howard; Central and Southeast Howard; Northwest Harford; Southeast Harford; Albemarle; Greene; Madison; Rappahannock; Orange; Culpeper; Fairfax; Stafford; Spotsylvania; Northern Fauquier; Southern Fauquier; Eastern Loudoun; Northwest Prince William; Central and Southeast Prince William/Manassas/Manassas Park
See it on weather.gov (opens in a new tab)

Observed 4:35 PM EDT at KOMH

Brightwood, VA weather

Sunny and 63°17°, jacket by 7 PM.

Forecasts agree

Now 63°17°

Sunny

Wind: Calm; Light through 5 AM
Dew point: 46°8°; Comfortable · down to 38°3° by 2 AM
UV tomorrow: 5Moderate; Moderate 11 AM–5 PM · peak 5
Air quality: 38Good; Main pollutant: Ozone
Pressure: 30.48 inHg1032 hPa; Falling slowly · −0.04 inHg−1.5 hPa in 3 h

No precipitation expected in the next 2 hours.

From forecast models

Next 48 hours

4°2° warmer than this time yesterday (61°16° then, 64°18° now)

Good hours for

Drops 15°8° tonight 6–9 PM (60°16° → 45°7°)
Below 50°10° tonight after 8 PM
Above 50°10° tomorrow by 10 AM
High 71°22° tomorrow at 3 PM
Drops 12°7° tomorrow 5–8 PM (69°21° → 57°14°)

TonightDown to 36°2° by 4 AM · Clear
Tomorrow morningUp to 59°15° by 11 AM · Clear
Tomorrow afternoonUp to 71°22° by 3 PM · Clear
Tomorrow nightDown to 44°7° by 4 AM · Clear
Tuesday morningUp to 61°16° by 11 AM · Clear
Tuesday afternoonUp to 69°21° by 3 PM · Clear

Hourly forecast, next 48 hours, in the place's local time
Hour	Conditions	Temperature	Feels like	Precipitation	Wind	Humidity	Cloud cover	UV index
Sun 5p	Sunny	63°17° (likely 61°16° to 64°18°)	63°17°	0%	3 mph5 km/h from S, gusts 7 mph11 km/h	48%	1%	1
Sun 6p	Clear	60°16° (likely 58°14° to 60°16°)	60°16°	0%	2 mph3 km/h from S, gusts 5 mph8 km/h	53%	4%	0
Sun 7p	Clear	52°11° (likely 52°11° to 56°13°)	52°11°	0%	0 mph0 km/h, gusts 4 mph7 km/h	74%	2%	0
Sun 8p	Clear	45°7° (likely 45°7° to 54°12°)	45°7°	0%	0 mph0 km/h, gusts 3 mph6 km/h	100%	0%	0
Sun 9p	Clear	44°7° (likely 44°7° to 52°11°)	44°7°	0%	0 mph0 km/h, gusts 3 mph5 km/h	100%	0%	0
Sun 10p	Clear	43°6° (likely 43°6° to 51°11°)	43°6°	0%	0 mph0 km/h, gusts 3 mph5 km/h	100%	0%	0
Sun 11p	Clear	42°6° (likely 42°6° to 51°11°)	42°6°	0%	0 mph0 km/h, gusts 3 mph5 km/h	100%	0%	0
Mon 12a	Clear	40°4° (likely 40°4° to 50°10°)	40°4°	0%	0 mph0 km/h, gusts 3 mph5 km/h	100%	7%	0
Mon 1a	Clear	39°4° (likely 39°4° to 49°9°)	39°4°	0%	0 mph0 km/h, gusts 3 mph4 km/h	100%	12%	0
Mon 2a	Clear	38°3° (likely 38°3° to 48°9°)	38°3°	0%	0 mph0 km/h, gusts 3 mph5 km/h	100%	12%	0
Mon 3a	Clear	38°3° (likely 38°3° to 47°8°)	38°3°	0%	0 mph0 km/h, gusts 4 mph7 km/h	100%	13%	0
Mon 4a	Clear	36°2° (likely 36°2° to 47°8°)	36°2°	0%	0 mph0 km/h, gusts 6 mph10 km/h	100%	14%	0
Mon 5a	Clear	36°2° (likely 36°2° to 46°8°)	36°2°	0%	0 mph0 km/h, gusts 6 mph10 km/h	100%	13%	0
Mon 6a	Clear	35°2° (likely 35°2° to 46°8°)	35°2°	0%	0 mph0 km/h, gusts 6 mph10 km/h	100%	14%	0
Mon 7a	Clear	35°2° (likely 35°2° to 45°7°)	35°2°	0%	0 mph0 km/h, gusts 6 mph9 km/h	100%	11%	0
Mon 8a	Sunny	35°2° (likely 35°2° to 46°8°)	35°2°	0%	0 mph0 km/h, gusts 4 mph7 km/h	100%	12%	0
Mon 9a	Sunny	42°6° (likely 42°6° to 49°9°)	42°6°	0%	0 mph0 km/h, gusts 5 mph9 km/h	93%	12%	1
Mon 10a	Sunny	52°11° (likely 52°11° to 57°14°)	52°11°	0%	0 mph0 km/h, gusts 5 mph8 km/h	74%	0%	2
Mon 11a	Sunny	59°15° (likely 59°15° to 62°17°)	59°15°	0%	0 mph0 km/h, gusts 5 mph7 km/h	62%	0%	3
Mon 12p	Sunny	64°18° (likely 64°18° to 66°19°)	64°18°	0%	0 mph0 km/h, gusts 5 mph9 km/h	52%	2%	4
Mon 1p	Sunny	67°19° (likely 67°19° to 68°20°)	67°19°	0%	0 mph0 km/h, gusts 4 mph7 km/h	45%	0%	5
Mon 2p	Sunny	70°21° (likely 68°20° to 70°21°)	70°21°	0%	1 mph2 km/h from N, gusts 4 mph6 km/h	39%	0%	4
Mon 3p	Sunny	71°22° (likely 69°21° to 71°22°)	71°22°	0%	0 mph0 km/h, gusts 4 mph6 km/h	39%	2%	4
Mon 4p	Sunny	70°21° (likely 69°21° to 70°21°)	70°21°	0%	0 mph0 km/h, gusts 5 mph7 km/h	41%	0%	3
Mon 5p	Sunny	69°21° (likely 67°19° to 69°21°)	69°21°	0%	0 mph0 km/h, gusts 3 mph5 km/h	44%	2%	2
Mon 6p	Clear	65°18° (likely 63°17° to 65°18°)	65°18°	0%	0 mph0 km/h, gusts 4 mph6 km/h	48%	0%	1
Mon 7p	Clear	57°14° (likely 57°14° to 60°16°)	57°14°	0%	0 mph0 km/h, gusts 5 mph8 km/h	64%	0%	0
Mon 8p	Clear	53°12° (likely 53°12° to 58°14°)	53°12°	0%	0 mph0 km/h, gusts 4 mph6 km/h	74%	0%	0
Mon 9p	Clear	50°10° (likely 50°10° to 56°13°)	50°10°	0%	0 mph0 km/h, gusts 4 mph6 km/h	83%	1%	0
Mon 10p	Clear	49°9° (likely 49°9° to 55°13°)	49°9°	0%	0 mph0 km/h, gusts 4 mph6 km/h	86%	3%	0
Mon 11p	Clear	47°8° (likely 47°8° to 54°12°)	47°8°	0%	0 mph0 km/h, gusts 3 mph5 km/h	89%	5%	0
Tue 12a	Clear	46°8° (likely 46°8° to 54°12°)	46°8°	0%	0 mph0 km/h, gusts 3 mph5 km/h	93%	17%	0
Tue 1a	Mostly clear	45°7° (likely 45°7° to 53°12°)	45°7°	0%	0 mph0 km/h, gusts 3 mph5 km/h	96%	28%	0
Tue 2a	Cloudy	45°7° (likely 45°7° to 53°12°)	45°7°	0%	0 mph0 km/h, gusts 3 mph5 km/h	96%	61%	0
Tue 3a	Mostly clear	45°7° (likely 45°7° to 52°11°)	45°7°	0%	0 mph0 km/h, gusts 4 mph6 km/h	96%	31%	0
Tue 4a	Clear	44°7° (likely 44°7° to 52°11°)	44°7°	0%	0 mph0 km/h, gusts 4 mph7 km/h	100%	21%	0
Tue 5a	Clear	44°7° (likely 44°7° to 52°11°)	44°7°	0%	0 mph0 km/h, gusts 5 mph7 km/h	100%	17%	0
Tue 6a	Clear	44°7° (likely 44°7° to 52°11°)	44°7°	0%	0 mph0 km/h, gusts 5 mph9 km/h	100%	6%	0
Tue 7a	Clear	43°6° (likely 43°6° to 52°11°)	43°6°	0%	0 mph0 km/h, gusts 5 mph8 km/h	100%	2%	0
Tue 8a	Sunny	44°7° (likely 44°7° to 50°10°)	44°7°	0%	1 mph2 km/h from N, gusts 8 mph13 km/h	100%	2%	0
Tue 9a	Sunny	50°10° (likely 50°10° to 55°13°)	50°10°	0%	2 mph3 km/h from N, gusts 9 mph14 km/h	89%	1%	1
Tue 10a	Sunny	56°13° (likely 56°13° to 61°16°)	56°13°	0%	3 mph5 km/h from N, gusts 12 mph19 km/h	77%	0%	2
Tue 11a	Sunny	61°16° (likely 60°16° to 64°18°)	61°16°	0%	3 mph5 km/h from NE, gusts 14 mph22 km/h	70%	1%	3
Tue 12p	Sunny	65°18° (likely 63°17° to 66°19°)	65°18°	0%	3 mph5 km/h from NE, gusts 11 mph18 km/h	60%	2%	4
Tue 1p	Sunny	67°19° (likely 65°18° to 68°20°)	67°19°	0%	3 mph5 km/h from NE, gusts 9 mph15 km/h	56%	6%	4
Tue 2p	Sunny	68°20° (likely 66°19° to 69°21°)	68°20°	0%	3 mph5 km/h from NE, gusts 8 mph12 km/h	57%	11%	4
Tue 3p	Mostly sunny	69°21° (likely 67°19° to 69°21°)	69°21°	0%	3 mph5 km/h from NE, gusts 7 mph12 km/h	55%	10%	4
Tue 4p	Mostly sunny	69°21° (likely 66°19° to 69°21°)	69°21°	0%	2 mph3 km/h from E, gusts 6 mph9 km/h	55%	7%	3

Days ahead

Shaded: typical range for these dates (1991–2020)

Today, Oct 25. Sunny. High 65°18°, low 35°2°. Typical 65°18° / 43°6°. Dry. Forecasts agree.
1. Evening
  6 PM–midnight
  Clear, 45°7°
  Dry
2. Overnight
  midnight–6 AM
  Clear, 36°2°
  Dry
Official NWS forecast
Today: Sunny, with a high near 65. South wind around 3 mph.
Tonight: Areas of frost between 4am and 5am, then areas of frost and patchy fog. Mostly clear, with a low around 35. East wind around 2 mph.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
63°17°–65°18°
Low, likely
35°2°–42°6°
Typical high / low
65°18° / 43°6°
Wind
6 mph9 km/h, gusts 13 mph21 km/h
UV peak
4
Tomorrow, Oct 26. Sunny. High 71°22°, low 43°6°. Typical 65°18° / 42°6°. Dry. Forecasts agree.
1. Morning
  6 AM–noon
  Sunny, 35°2°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 71°22°
  Dry
3. Evening
  6 PM–midnight
  Clear, 53°12°
  Dry
4. Overnight
  midnight–6 AM
  Mostly clear, 44°7°
  Dry
Official NWS forecast
Day: Areas of frost and patchy fog before 9am. Sunny, with a high near 71. North wind around 1 mph.
Night: Mostly clear, with a low around 43. Wind around 0 mph.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
69°21°–71°22°
Low, likely
38°3°–45°7°
Typical high / low
65°18° / 42°6°
Wind
5 mph8 km/h, gusts 10 mph16 km/h
UV peak
5
Tuesday, Oct 27. Mostly sunny. High 70°21°, low 45°7°. Typical 64°18° / 42°6°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 44°7°
  Dry
2. Afternoon
  noon–6 PM
  Mostly sunny, 69°21°
  Dry
3. Evening
  6 PM–midnight
  Clear, 56°13°
  Dry
4. Overnight
  midnight–6 AM
  Partly cloudy, 47°8°
  Dry
Official NWS forecast
Day: Sunny, with a high near 70. North wind 0 to 3 mph.
Night: Partly cloudy, with a low around 45.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
67°19°–70°21°
Low, likely
43°6°–50°10°
Typical high / low
64°18° / 42°6°
Wind
9 mph14 km/h, gusts 17 mph27 km/h
UV peak
4
Wednesday, Oct 28. Mostly cloudy. High 66°19°, low 46°8°. Typical 64°18° / 42°6°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Cloudy, 46°8°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 64°18°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 54°12°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 48°9°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Partly sunny, with a high near 66.
Night: Mostly cloudy, with a low around 46.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
62°17°–66°19°
Low, likely
42°6°–49°9°
Typical high / low
64°18° / 42°6°
Wind
4 mph7 km/h, gusts 12 mph19 km/h
UV peak
4
Thursday, Oct 29. Partly sunny. High 71°22°, low 48°9°. Typical 64°18° / 41°5°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Partly sunny, 48°9°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 70°21°
  Dry
3. Evening
  6 PM–midnight
  Clear, 57°14°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 49°10°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Mostly sunny, with a high near 71.
Night: Mostly clear, with a low around 48.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
69°21°–72°22°
Low, likely
44°7°–50°10°
Typical high / low
64°18° / 41°5°
Wind
8 mph13 km/h, gusts 20 mph33 km/h
UV peak
4
Friday, Oct 30. Mostly sunny. High 76°24°, low 51°11°. Typical 63°17° / 41°5°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 49°10°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 76°25°
  Dry
3. Evening
  6 PM–midnight
  Clear, 61°16°
  Dry
4. Overnight
  midnight–6 AM
  Mostly clear, 50°10°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Sunny, with a high near 76.
Night: Partly cloudy, with a low around 51.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
75°24°–78°26°
Low, likely
43°6°–53°12°
Typical high / low
63°17° / 41°5°
Wind
7 mph12 km/h, gusts 16 mph25 km/h
UV peak
4
Saturday, Oct 31. Cloudy. High 73°23°, low 53°12°. Typical 63°17° / 41°5°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Cloudy, 51°10°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 67°20°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 58°14°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 53°11°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Mostly sunny, with a high near 73.
Night: Mostly cloudy, with a low around 53.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
63°17°–73°23°
Low, likely
45°7°–55°13°
Typical high / low
63°17° / 41°5°
Wind
6 mph10 km/h, gusts 15 mph23 km/h
UV peak
4
Sunday, Nov 1. Cloudy. High 67°19°, low 50°10°. Typical 63°17° / 40°4°. Rain 0.01 in0.3 mm, 30% chance. Mostly agree.
1. Morning
  6 AM–noon
  Cloudy, 52°11°
  20% chance
2. Afternoon
  noon–6 PM
  Cloudy, 66°19°
  30% chance
3. Evening
  6 PM–midnight
  Cloudy, 58°15°
  30% chance
4. Overnight
  midnight–6 AM
  Drizzle, 55°13°
  30% chance · 0.04 in1.1 mm
Hours this far out come from computer models only.
The National Weather Service writes about seven days ahead; this day is our model forecast only.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
64°18°–68°20°
Low, likely
46°8°–55°13°
Typical high / low
63°17° / 40°4°
Wind
5 mph8 km/h, gusts 14 mph23 km/h
UV peak
4
Monday, Nov 2. Drizzle. High 67°19°, low 54°12°. Typical 62°17° / 40°4°. Rain 0.09 in2.3 mm, 30% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Cloudy, 56°14°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 65°18°
  Dry
3. Evening
  6 PM–midnight
  Drizzle, 60°15°
  Dry
4. Overnight
  midnight–6 AM
  Drizzle, 58°14°
  Dry
Hours this far out come from computer models only.
The National Weather Service writes about seven days ahead; this day is our model forecast only.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
60°16°–73°23°
Low, likely
50°10°–58°14°
Typical high / low
62°17° / 40°4°
Wind
7 mph12 km/h, gusts 20 mph31 km/h
UV peak
2
Tuesday, Nov 3. Drizzle. High 67°19°, low 56°13°. Typical 62°17° / 40°4°. Rain 0.07 in1.8 mm, 20% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Drizzle, 59°15°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 66°19°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 62°16°
  Dry
Hours this far out come from computer models only.
The National Weather Service writes about seven days ahead; this day is our model forecast only.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
55°13°–76°24°
Low, likely
48°9°–66°19°
Typical high / low
62°17° / 40°4°
Wind
15 mph24 km/h, gusts 31 mph49 km/h
UV peak
1

10 days15 days30 days

The outlook

Today
Dry, high 65°, low 35°.
Tomorrow
Dry, high 71°, low 43°, warming up.
Tuesday
Dry, high 70°, low 45°.
Rest of week
Mostly dry, highs 66–76°.

Want the meteorologists’ reasoning? Read the NWS forecast discussion (LWX) (opens in a new tab)

What changed since yesterday

No meaningful changes from yesterday’s forecast.

Radar

Radar data: NOAA MRMS, rendered by forecast.blue

Radar loads when scrolled into view

Full-screen radar

Rivers

NOAA river gauges within 25 mi

Rapidan River near Culpeper

12 mi

Below flood stage

Level: 0.7 ft
Flow: 157 cfs

Forecast peak 0.7 ft Sun 8 PM

Reading from Sun 3:45 PM · NWS gauge page

Robinson River at US 29

2.5 mi

Below flood stage

Level: 3.3 ft

Reading from Sun 5 PM · NWS gauge page

Robinson River near Locust Dale

7.8 mi

Below flood stage

Level: 2.0 ft
Flow: 81 cfs

Reading from Sun 4:45 PM · NWS gauge page

Robinson River at Quaker Run Road

8.1 mi

Below flood stage

Level: 3.3 ft

Reading from Sun 5 PM · NWS gauge page

For your home

What this week’s weather means for heating, cooling, pipes and fresh air.

Heating this week

About 67% less heating than a typical week.

This week 28Typical 85

Heating degree days, base 65°F

Heat-pump hours, next 7 days

h below 47°F: 24
h below 17°F: 0
h below 5°F: 0

47, 17 and 5°F are the test points heat pumps are rated at. About 11 hours are near freezing and damp, when outdoor units defrost more often.

Comfort

Dry air outside (dew point 46°F).

Open the windows?

Mon, 12:00 PM–6:00 PM

Good stretch to open the windows (air quality forecast not available for part of this window).

Is this typical?

Piedmont Research Station · official normals 1991–2020 · records 1946–2026

Oct 25, today vs a typical year

Today’s expected high is about typical for the date.

Last 7 days vs normal

—MonOct 19
—TueOct 20
—WedOct 21
—ThuOct 22
—FriOct 23
—SatOct 24
—SunOct 25

Brightwood weather by month: normals, records, snow and freeze dates

Sun & moon

Sun

Daylight: 10 h 49 min; Losing 2 min 21 s a day; shortest Dec 21, 1 h 20 min less
Golden hour: 5:44–6:37 PM; Morning 7:15–8:08 AM
Blue hour: 6:37–6:48 PM; Morning 7:04–7:15 AM; first light 7:04 AM

Stars tonight? Fair

Clear 6:48 PM–7:05 AM, but the moon is 100% lit and up.

Moon

Full moon

100% lit · growing

Today: sets 6:54 AM · rises 5:47 PM
Full moon: Oct 26
New moon: Nov 9

Looking northwest from Brightwood. The highest point on the skyline is about 4,000 ft, 15 mi away.Skyline from USGS elevation data, heights drawn up to 6× taller. Sky, sun and moon as they are now.

1 active weather alert

Frost Advisory

Brightwood, VA weather

Next 2 hours

Next 48 hours

Days ahead

The outlook

Today

Tomorrow

Tuesday

Rest of week

What changed since yesterday

Radar

Rivers

Rapidan River near Culpeper

Robinson River at US 29

Robinson River near Locust Dale

Robinson River at Quaker Run Road

For your home

Heating this week

Heat-pump hours, next 7 days

Comfort

Open the windows?

Is this typical?

Oct 25, today vs a typical year

Last 7 days vs normal

Sun & moon

Sun

Stars tonight? Fair

Moon