Frost Advisory
Starts in 25 min
When
Until 9 AM EDT Sunday.
Where
In Maryland, Central and Southeast Howard and Central and Southeast Montgomery Counties. In Virginia, Orange, Spotsylvania, Fairfax, Stafford, and Madison Counties.
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.
Precautionary actions
Take steps now to protect tender plants from the cold.
Areas: Central and Southeast Montgomery; Central and Southeast Howard; Madison; Orange; Fairfax; Stafford; Spotsylvania
See it on weather.gov (opens in a new tab)

Observed 11:15 PM EDT at KCGS

Burnt Mills, MD weather

Clear and 43°6°.

Forecasts agree

Now 43°6°

Clear

Wind: Calm; Light through 12 PM
Dew point: 42°5°; Comfortable
Humidity: 95%; Air 43°6°, dew point 42°5° · fog or dew likely
UV index: 0Low; Moderate 11 AM–5 PM · peak 4
Air quality: 51Moderate; Main pollutant: PM2.5 (fine particles)
Pressure: 30.56 inHg1035 hPa; Steady over the next 3 h

No precipitation expected in the next 2 hours.

From forecast models

Next 48 hours

About the same as this time yesterday (43°6° then, 42°6° now)

Good hours for

Low 38°3° today at 6 AM
Above 50°10° today by 10 AM
High 65°18° today at 3 PM
Below 50°10° tonight after 9 PM

TonightDown to 39°4° by 3 AM · Clear
This morningUp to 57°14° by 11 AM · Clear
This afternoonUp to 65°18° by 3 PM · Clear
TonightDown to 41°5° by 3 AM · Clear
Tomorrow morningUp to 59°15° by 11 AM · Clear
Tomorrow afternoonUp to 68°20° by 3 PM · Clear
Tomorrow nightDown to 51°11° by 11 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 12a	Clear	45°7° (likely 45°7° to 48°9°)	45°7°	0%	1 mph2 km/h from E, gusts 3 mph5 km/h	76%	7%	0
Sun 1a	Clear	43°6° (likely 43°6° to 47°8°)	43°6°	0%	1 mph2 km/h from E, gusts 4 mph7 km/h	86%	6%	0
Sun 2a	Clear	40°4° (likely 40°4° to 46°8°)	40°4°	0%	1 mph2 km/h from NE, gusts 4 mph7 km/h	100%	1%	0
Sun 3a	Clear	39°4° (likely 39°4° to 45°7°)	39°4°	0%	1 mph2 km/h from NE, gusts 5 mph8 km/h	100%	1%	0
Sun 4a	Clear	39°4° (likely 39°4° to 44°7°)	39°4°	0%	1 mph2 km/h from NE, gusts 5 mph8 km/h	100%	1%	0
Sun 5a	Clear	39°4° (likely 39°4° to 44°7°)	39°4°	0%	2 mph3 km/h from N, gusts 6 mph9 km/h	100%	0%	0
Sun 6a	Clear	38°3° (likely 38°3° to 43°6°)	38°3°	0%	2 mph3 km/h from N, gusts 5 mph8 km/h	100%	0%	0
Sun 7a	Sunny	38°3° (likely 38°3° to 43°6°)	38°3°	0%	2 mph3 km/h from N, gusts 5 mph9 km/h	100%	0%	0
Sun 8a	Sunny	38°3° (likely 38°3° to 43°6°)	38°3°	0%	2 mph3 km/h from N, gusts 5 mph9 km/h	100%	10%	0
Sun 9a	Sunny	45°7° (likely 44°7° to 48°9°)	45°7°	0%	2 mph3 km/h from NE, gusts 5 mph8 km/h	89%	11%	1
Sun 10a	Sunny	53°12° (likely 52°11° to 54°12°)	53°12°	0%	1 mph2 km/h from E, gusts 6 mph9 km/h	71%	1%	2
Sun 11a	Sunny	57°14° (likely 55°13° to 59°15°)	57°14°	0%	1 mph2 km/h from E, gusts 5 mph9 km/h	62%	2%	3
Sun 12p	Sunny	61°16° (likely 58°14° to 61°16°)	61°16°	0%	1 mph2 km/h from SE, gusts 5 mph8 km/h	51%	2%	4
Sun 1p	Sunny	63°17° (likely 61°16° to 63°17°)	63°17°	0%	1 mph2 km/h from SE, gusts 5 mph8 km/h	48%	2%	4
Sun 2p	Sunny	64°18° (likely 62°17° to 65°18°)	64°18°	0%	1 mph2 km/h from S, gusts 5 mph8 km/h	45%	4%	4
Sun 3p	Sunny	65°18° (likely 63°17° to 66°19°)	65°18°	0%	1 mph2 km/h from S, gusts 5 mph8 km/h	43%	4%	4
Sun 4p	Sunny	65°18° (likely 64°18° to 66°19°)	65°18°	0%	1 mph2 km/h from SE, gusts 6 mph10 km/h	43%	3%	3
Sun 5p	Sunny	64°18° (likely 63°17° to 65°18°)	64°18°	0%	1 mph2 km/h from SE, gusts 5 mph8 km/h	45%	7%	1
Sun 6p	Clear	61°16° (likely 59°15° to 62°17°)	61°16°	0%	1 mph2 km/h from SE, gusts 5 mph8 km/h	51%	2%	0
Sun 7p	Clear	57°14° (likely 55°13° to 58°14°)	57°14°	0%	1 mph2 km/h from SE, gusts 5 mph8 km/h	59%	3%	0
Sun 8p	Clear	51°11° (likely 51°11° to 56°13°)	51°11°	0%	1 mph2 km/h from SE, gusts 4 mph7 km/h	83%	2%	0
Sun 9p	Clear	49°9° (likely 49°9° to 53°12°)	49°9°	0%	1 mph2 km/h from S, gusts 5 mph8 km/h	89%	0%	0
Sun 10p	Clear	47°8° (likely 47°8° to 51°11°)	47°8°	0%	0 mph0 km/h, gusts 5 mph8 km/h	93%	0%	0
Sun 11p	Clear	45°7° (likely 45°7° to 50°10°)	45°7°	0%	0 mph0 km/h, gusts 4 mph6 km/h	100%	0%	0
Mon 12a	Clear	44°7° (likely 44°7° to 50°10°)	44°7°	0%	0 mph0 km/h, gusts 4 mph7 km/h	100%	0%	0
Mon 1a	Clear	43°6° (likely 43°6° to 49°9°)	43°6°	0%	1 mph2 km/h from W, gusts 4 mph6 km/h	100%	0%	0
Mon 2a	Clear	42°6° (likely 42°6° to 47°8°)	42°6°	0%	1 mph2 km/h from W, gusts 4 mph6 km/h	100%	0%	0
Mon 3a	Clear	41°5° (likely 41°5° to 46°8°)	41°5°	0%	2 mph3 km/h from W, gusts 4 mph7 km/h	100%	0%	0
Mon 4a	Clear	41°5° (likely 41°5° to 45°7°)	41°5°	0%	2 mph3 km/h from W, gusts 5 mph9 km/h	100%	6%	0
Mon 5a	Clear	41°5° (likely 41°5° to 45°7°)	41°5°	0%	2 mph3 km/h from NW, gusts 6 mph9 km/h	100%	10%	0
Mon 6a	Clear	41°5° (likely 41°5° to 44°7°)	41°5°	0%	2 mph3 km/h from NW, gusts 6 mph9 km/h	100%	12%	0
Mon 7a	Sunny	40°4° (likely 40°4° to 44°7°)	40°4°	0%	2 mph3 km/h from NW, gusts 6 mph9 km/h	100%	12%	0
Mon 8a	Sunny	41°5° (likely 41°5° to 44°7°)	39°4°	0%	3 mph5 km/h from NW, gusts 7 mph11 km/h	100%	13%	0
Mon 9a	Sunny	46°8° (likely 45°7° to 49°9°)	45°7°	0%	3 mph5 km/h from W, gusts 7 mph11 km/h	100%	18%	1
Mon 10a	Sunny	54°12° (likely 52°11° to 55°13°)	54°12°	0%	3 mph5 km/h from W, gusts 9 mph14 km/h	77%	0%	2
Mon 11a	Sunny	59°15° (likely 58°14° to 60°16°)	59°15°	0%	5 mph8 km/h from W, gusts 11 mph17 km/h	64%	0%	3
Mon 12p	Sunny	63°17° (likely 62°17° to 64°18°)	63°17°	0%	5 mph8 km/h from W, gusts 10 mph17 km/h	54%	6%	4
Mon 1p	Sunny	65°18° (likely 65°18° to 67°19°)	65°18°	0%	6 mph10 km/h from NW, gusts 10 mph17 km/h	50%	7%	4
Mon 2p	Sunny	67°19° (likely 67°19° to 69°21°)	67°19°	0%	6 mph10 km/h from NW, gusts 10 mph17 km/h	47%	9%	4
Mon 3p	Sunny	68°20° (likely 68°20° to 70°21°)	68°20°	0%	6 mph10 km/h from NW, gusts 11 mph17 km/h	45%	0%	4
Mon 4p	Sunny	68°20° (likely 68°20° to 70°21°)	68°20°	0%	5 mph8 km/h from NW, gusts 10 mph16 km/h	43%	0%	3
Mon 5p	Sunny	68°20° (likely 67°19° to 69°21°)	68°20°	0%	5 mph8 km/h from NW, gusts 10 mph16 km/h	45%	0%	1
Mon 6p	Clear	64°18° (likely 63°17° to 64°18°)	64°18°	0%	3 mph5 km/h from NW, gusts 7 mph11 km/h	54%	0%	0
Mon 7p	Clear	60°16° (likely 59°15° to 60°16°)	60°16°	0%	3 mph5 km/h from NW, gusts 5 mph9 km/h	62%	0%	0
Mon 8p	Clear	56°13° (likely 55°13° to 58°14°)	56°13°	0%	2 mph3 km/h from NW, gusts 5 mph8 km/h	74%	4%	0
Mon 9p	Clear	54°12° (likely 51°11° to 59°15°)	54°12°	0%	2 mph3 km/h from NW, gusts 4 mph6 km/h	80%	1%	0
Mon 10p	Clear	52°11° (likely 49°9° to 58°14°)	52°11°	0%	2 mph3 km/h from NW, gusts 6 mph10 km/h	86%	1%	0
Mon 11p	Clear	51°11° (likely 48°9° to 57°14°)	51°11°	0%	3 mph5 km/h from NW, gusts 6 mph9 km/h	89%	1%	0

Days ahead

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

Today, Oct 25. Sunny. High 65°18°, low 38°3°. Typical 66°19° / 49°9°. Dry. Forecasts agree.
1. Morning
  6 AM–noon
  Sunny, 38°3°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 65°18°
  Dry
3. Evening
  6 PM–midnight
  Clear, 51°11°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 41°5°
  Dry
Official NWS forecast
Today: Areas of frost before 9am. Sunny, with a high near 65. Southeast wind around 2 mph.
Tonight: Areas of frost between 1am and 2am, then areas of frost and patchy fog. Clear, with a low around 38. Northeast wind around 2 mph.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
64°18°–66°19°
Low, likely
38°3°–43°6°
Typical high / low
66°19° / 49°9°
Wind
6 mph9 km/h
UV peak
4
Tomorrow, Oct 26. Sunny. High 68°20°, low 49°9°. Typical 66°19° / 48°9°. Dry. Forecasts agree.
1. Morning
  6 AM–noon
  Sunny, 41°5°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 68°20°
  Dry
3. Evening
  6 PM–midnight
  Clear, 56°13°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 51°10°
  Dry
Official NWS forecast
Day: Sunny, with a high near 68. West wind 2 to 6 mph.
Night: Clear, with a low around 49. Northwest wind 2 to 6 mph.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
68°20°–70°21°
Low, likely
41°5°–49°9°
Typical high / low
66°19° / 48°9°
Wind
6 mph10 km/h, gusts 15 mph24 km/h
UV peak
4
Tuesday, Oct 27. Cloudy. High 68°20°, low 46°8°. Typical 65°18° / 48°9°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 50°10°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 68°20°
  Dry
3. Evening
  6 PM–midnight
  Partly cloudy, 57°14°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 48°9°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Sunny, with a high near 68.
Night: Partly cloudy, with a low around 46.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
66°19°–70°21°
Low, likely
46°8°–52°11°
Typical high / low
65°18° / 48°9°
Wind
8 mph13 km/h, gusts 19 mph31 km/h
UV peak
4
Wednesday, Oct 28. Mostly cloudy. High 65°18°, low 48°9°. Typical 65°18° / 48°9°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Partly sunny, 48°9°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 65°18°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 56°13°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 49°10°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Partly sunny, with a high near 65.
Night: Mostly cloudy, with a low around 48.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
63°17°–66°19°
Low, likely
45°7°–49°9°
Typical high / low
65°18° / 48°9°
Wind
7 mph11 km/h, gusts 14 mph23 km/h
UV peak
4
Thursday, Oct 29. Partly sunny. High 70°21°, low 50°10°. Typical 65°18° / 47°8°. Dry. Forecasts agree.
1. Morning
  6 AM–noon
  Cloudy, 48°9°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 69°20°
  Dry
3. Evening
  6 PM–midnight
  Clear, 60°16°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 51°11°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Mostly sunny, with a high near 70.
Night: Mostly clear, with a low around 50.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
68°20°–70°21°
Low, likely
46°8°–50°10°
Typical high / low
65°18° / 47°8°
Wind
7 mph11 km/h, gusts 22 mph35 km/h
UV peak
4
Friday, Oct 30. Mostly sunny. High 73°23°, low 51°11°. Typical 64°18° / 47°8°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 50°10°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 75°24°
  Dry
3. Evening
  6 PM–midnight
  Clear, 64°18°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 54°12°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Sunny, with a high near 73.
Night: Mostly clear, with a low around 51.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
73°23°–76°24°
Low, likely
46°8°–52°11°
Typical high / low
64°18° / 47°8°
Wind
6 mph9 km/h, gusts 13 mph22 km/h
UV peak
4
Saturday, Oct 31. Cloudy. High 71°22°, low 51°11°. Typical 64°18° / 46°8°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Partly sunny, 51°11°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 68°20°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 58°15°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 51°11°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Mostly sunny, with a high near 71.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
65°18°–72°22°
Low, likely
47°8°–55°13°
Typical high / low
64°18° / 46°8°
Wind
8 mph13 km/h, gusts 17 mph28 km/h
UV peak
3
Sunday, Nov 1. Cloudy. High 71°22°, low 53°12°. Typical 64°18° / 46°8°. Rain 0.03 in0.8 mm, 30% chance. Mostly agree.
1. Morning
  6 AM–noon
  Cloudy, 51°10°
  20% chance
2. Afternoon
  noon–6 PM
  Cloudy, 71°22°
  20% chance
3. Evening
  6 PM–midnight
  Drizzle, 66°19°
  30% chance · 0.05 in1.2 mm
4. Overnight
  midnight–6 AM
  Showers, 62°17°
  30% chance · 0.12 in3.1 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
68°20°–75°24°
Low, likely
50°10°–55°13°
Typical high / low
64°18° / 46°8°
Wind
9 mph14 km/h, gusts 28 mph45 km/h
UV peak
4
Monday, Nov 2. Drizzle. High 73°23°, low 61°16°. Typical 63°17° / 46°8°. Rain 0.27 in6.9 mm, 30% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Showers, 63°17°
  20% chance · 0.11 in2.7 mm
2. Afternoon
  noon–6 PM
  Cloudy, 73°23°
  20% chance
3. Evening
  6 PM–midnight
  Clear, 65°18°
  20% chance · 0.1 in2.5 mm
4. Overnight
  midnight–6 AM
  Clear, 58°14°
  20% chance · 0.17 in4.2 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.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
71°22°–78°26°
Low, likely
57°14°–68°20°
Typical high / low
63°17° / 46°8°
Wind
15 mph25 km/h, gusts 36 mph58 km/h
UV peak
3
Tuesday, Nov 3. Cloudy. High 72°22°, low 57°14°. Typical 63°17° / 45°7°. Rain 0.1 in2.5 mm, 20% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Sunny, 60°15°
  20% chance · 0.04 in1 mm
2. Afternoon
  noon–6 PM
  Cloudy, 73°23°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 63°17°
  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
67°19°–79°26°
Low, likely
53°12°–61°16°
Typical high / low
63°17° / 45°7°
Wind
15 mph23 km/h, gusts 33 mph53 km/h
UV peak
4

10 days15 days30 days

The outlook

Today
Dry, high 65°, low 38°.
Tomorrow
Dry, high 68°, low 49°, warming up.
Tuesday
Dry, high 68°, low 46°.
Rest of week
Mostly dry, highs 65–73°.

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

Paint Branch near White Oak

1.8 mi

Below flood stage

Level: 1.5 ft
Flow: 2 cfs

Reading from Sat 11:05 PM · NWS gauge page

Paint Branch near Hillandale / Powder Mill Road

2.5 mi

Level: 0.8 ft

Reading from Sat 7:40 PM · NWS gauge page

Northwest Branch at Kemp Mill

2.7 mi

Below flood stage

Level: 1.4 ft
Flow: 2 cfs

Reading from Sat 10:45 PM · NWS gauge page

Northwest Branch Anacostia River at Adelphi Mill

3.2 mi

Level: 1.0 ft

Reading from Sat 9:45 PM · NWS gauge page

For your home

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

Heating this week

About 57% less heating than a typical week.

This week 27Typical 61

Heating degree days, base 65°F

Heat-pump hours, next 7 days

h below 47°F: 21
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 14 hours are near freezing and damp, when outdoor units defrost more often.

Comfort

Dry air outside (dew point 42°F).

Open the windows?

Today, 12:00 PM–6:00 PM

Good stretch to open the windows.

Is this typical?

Washington Reagan National Airport · official normals 1991–2020 · records 1872–2026

Oct 25, today vs a typical year

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

Last 7 days vs normal

On average 1° colder than normal (daily mean temperature).

−4°−2°MonOct 19
+1°±0°TueOct 20
±0°WedOct 21
−1°ThuOct 22
−1°FriOct 23
—SatOct 24
—SunOct 25

Burnt Mills weather by month: normals, records, snow and freeze dates

Sun & moon

Sun

Daylight: 10 h 48 min; Losing 2 min 25 s a day; shortest Dec 21, 1 h 22 min less
Golden hour: 5:38–6:32 PM; Morning 7:11–8:05 AM
Blue hour: 6:32–6:42 PM; Morning 7:00–7:11 AM; first light 7:00 AM

Stars tonight? Fair

Clear 12:35–7 AM, but the moon is 99% lit and up.

Moon

Waxing gibbous

99% lit · growing

Today: sets 6:50 AM · rises 5:41 PM
Full moon: Oct 26
New moon: Nov 9

Looking west from Burnt Mills. The highest point on the skyline is about 3,000 ft, 22 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