Frost Advisory
Starts in 9 h 28 min
When
From 1 AM to 9 AM EDT Sunday.
Where
Portions of central, northeast, and northern Maryland 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.
Precautionary actions
Take steps now to protect tender plants from the cold.
Areas: Frederick; Carroll; Northern Baltimore; Cecil; Northwest Montgomery; Northwest Howard; Northwest Harford; Southeast Harford; Rappahannock; Culpeper; Northern Fauquier; Southern Fauquier; Western Loudoun; Eastern Loudoun; Northwest Prince William; Central and Southeast Prince William/Manassas/Manassas Park
See it on weather.gov (opens in a new tab)

Observed 3:10 PM EDT at KGAI

Germantown, MD weather

Sunny and 63°17°, jacket by 7 PM.

Mostly agree

Now 63°17°

Sunny

Wind: 5 mph7 km/h; From the south. Up to 5 mph8 km/h through 3 AM
Dew point: 39°4°; Comfortable
UV tomorrow: 4Moderate; Moderate 11 AM–5 PM · peak 4
Air quality: 34Good; Ozone · tomorrow moderate
Pressure: 30.52 inHg1034 hPa; Falling · −0.05 inHg−1.6 hPa in 3 h

No precipitation expected in the next 2 hours.

From forecast models

Next 48 hours

Good hours for

Below 50°10° tonight after 8 PM
Low 36°2° tomorrow at 6 AM
Above 50°10° tomorrow by 11 AM

This afternoonNear 62°17° · Clear
TonightDown to 37°3° by 4 AM · Clear
Tomorrow morningUp to 54°12° by 11 AM · Clear
Tomorrow afternoonUp to 64°18° by 5 PM · Clear
Tomorrow nightDown to 39°4° by 5 AM · Clear
Monday morningUp to 57°14° by 11 AM · Clear
Monday afternoonUp to 67°19° by 2 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
Sat 3p	Sunny	62°17° (likely 60°16° to 63°17°)	62°17°	0%	5 mph8 km/h from SE, gusts 8 mph13 km/h	43%	9%	2
Sat 4p	Sunny	62°17° (likely 60°16° to 63°17°)	62°17°	0%	5 mph8 km/h from SE, gusts 8 mph12 km/h	43%	9%	1
Sat 5p	Sunny	61°16° (likely 59°15° to 62°17°)	61°16°	0%	5 mph8 km/h from SE, gusts 9 mph14 km/h	44%	13%	1
Sat 6p	Clear	58°14° (likely 55°13° to 58°14°)	58°14°	0%	3 mph5 km/h from E, gusts 11 mph18 km/h	49%	13%	0
Sat 7p	Clear	55°13° (likely 52°11° to 55°13°)	55°13°	0%	3 mph5 km/h from E, gusts 9 mph14 km/h	57%	10%	0
Sat 8p	Clear	48°9° (likely 48°9° to 52°11°)	48°9°	0%	2 mph3 km/h from E, gusts 9 mph14 km/h	77%	0%	0
Sat 9p	Clear	44°7° (likely 44°7° to 49°9°)	44°7°	0%	2 mph3 km/h from E, gusts 9 mph14 km/h	89%	0%	0
Sat 10p	Clear	43°6° (likely 43°6° to 48°9°)	43°6°	0%	1 mph2 km/h from E, gusts 8 mph13 km/h	93%	0%	0
Sat 11p	Clear	41°5° (likely 41°5° to 47°8°)	41°5°	0%	1 mph2 km/h from E, gusts 7 mph11 km/h	96%	10%	0
Sun 12a	Clear	40°4° (likely 40°4° to 46°8°)	40°4°	0%	1 mph2 km/h from E, gusts 6 mph10 km/h	100%	14%	0
Sun 1a	Clear	39°4° (likely 39°4° to 46°8°)	39°4°	0%	1 mph2 km/h from NE, gusts 5 mph8 km/h	100%	15%	0
Sun 2a	Clear	39°4° (likely 39°4° to 45°7°)	39°4°	0%	0 mph0 km/h, gusts 5 mph8 km/h	100%	11%	0
Sun 3a	Clear	38°3° (likely 38°3° to 45°7°)	38°3°	0%	0 mph0 km/h, gusts 6 mph9 km/h	100%	1%	0
Sun 4a	Clear	37°3° (likely 37°3° to 44°7°)	37°3°	0%	0 mph0 km/h, gusts 5 mph8 km/h	100%	0%	0
Sun 5a	Clear	37°3° (likely 37°3° to 43°6°)	37°3°	0%	1 mph2 km/h from NE, gusts 5 mph8 km/h	100%	1%	0
Sun 6a	Clear	36°2° (likely 36°2° to 42°6°)	36°2°	0%	1 mph2 km/h from NE, gusts 5 mph8 km/h	100%	1%	0
Sun 7a	Sunny	36°2° (likely 36°2° to 42°6°)	36°2°	0%	0 mph0 km/h, gusts 5 mph9 km/h	100%	1%	0
Sun 8a	Sunny	37°3° (likely 37°3° to 42°6°)	37°3°	0%	1 mph2 km/h from N, gusts 6 mph9 km/h	100%	8%	0
Sun 9a	Sunny	41°5° (likely 41°5° to 47°8°)	41°5°	0%	1 mph2 km/h from N, gusts 6 mph9 km/h	100%	10%	1
Sun 10a	Sunny	49°9° (likely 49°9° to 53°12°)	49°9°	0%	0 mph0 km/h, gusts 6 mph9 km/h	80%	6%	2
Sun 11a	Sunny	54°12° (likely 54°12° to 58°14°)	54°12°	0%	0 mph0 km/h, gusts 4 mph7 km/h	69%	4%	3
Sun 12p	Sunny	57°14° (likely 57°14° to 60°16°)	57°14°	0%	1 mph2 km/h from SE, gusts 5 mph8 km/h	62%	7%	4
Sun 1p	Sunny	60°16° (likely 60°16° to 63°17°)	60°16°	0%	1 mph2 km/h from S, gusts 5 mph7 km/h	55%	6%	4
Sun 2p	Sunny	62°17° (likely 62°17° to 64°18°)	62°17°	0%	1 mph2 km/h from S, gusts 5 mph8 km/h	50%	6%	4
Sun 3p	Sunny	63°17° (likely 63°17° to 65°18°)	63°17°	0%	1 mph2 km/h from S, gusts 5 mph9 km/h	48%	4%	4
Sun 4p	Sunny	63°17° (likely 63°17° to 65°18°)	63°17°	0%	1 mph2 km/h from S, gusts 6 mph10 km/h	48%	4%	3
Sun 5p	Sunny	64°18° (likely 62°17° to 64°18°)	64°18°	0%	1 mph2 km/h from S, gusts 6 mph9 km/h	46%	5%	1
Sun 6p	Clear	61°16° (likely 58°14° to 61°16°)	61°16°	0%	1 mph2 km/h from S, gusts 5 mph8 km/h	51%	1%	0
Sun 7p	Clear	57°14° (likely 54°12° to 57°14°)	57°14°	0%	0 mph0 km/h, gusts 4 mph6 km/h	62%	1%	0
Sun 8p	Clear	53°12° (likely 52°11° to 54°12°)	53°12°	0%	0 mph0 km/h, gusts 3 mph5 km/h	71%	4%	0
Sun 9p	Clear	47°8° (likely 47°8° to 53°12°)	47°8°	0%	0 mph0 km/h, gusts 3 mph5 km/h	89%	1%	0
Sun 10p	Clear	46°8° (likely 46°8° to 52°11°)	46°8°	0%	0 mph0 km/h, gusts 4 mph6 km/h	93%	0%	0
Sun 11p	Clear	45°7° (likely 45°7° to 49°9°)	45°7°	0%	0 mph0 km/h, gusts 4 mph6 km/h	96%	0%	0
Mon 12a	Clear	43°6° (likely 43°6° to 48°9°)	43°6°	0%	0 mph0 km/h, gusts 3 mph5 km/h	100%	0%	0
Mon 1a	Clear	42°6° (likely 42°6° to 47°8°)	42°6°	0%	0 mph0 km/h, gusts 2 mph4 km/h	100%	0%	0
Mon 2a	Clear	42°6° (likely 42°6° to 46°8°)	42°6°	0%	0 mph0 km/h, gusts 3 mph5 km/h	100%	0%	0
Mon 3a	Clear	41°5° (likely 41°5° to 45°7°)	41°5°	0%	0 mph0 km/h, gusts 4 mph6 km/h	100%	0%	0
Mon 4a	Clear	40°4° (likely 40°4° to 44°7°)	40°4°	0%	1 mph2 km/h from NW, gusts 4 mph6 km/h	100%	0%	0
Mon 5a	Clear	39°4° (likely 39°4° to 43°6°)	39°4°	0%	1 mph2 km/h from W, gusts 4 mph7 km/h	100%	11%	0
Mon 6a	Clear	39°4° (likely 39°4° to 43°6°)	39°4°	0%	1 mph2 km/h from W, gusts 4 mph6 km/h	100%	12%	0
Mon 7a	Sunny	38°3° (likely 38°3° to 42°6°)	38°3°	0%	1 mph2 km/h from W, gusts 4 mph7 km/h	100%	18%	0
Mon 8a	Sunny	39°4° (likely 38°3° to 44°7°)	39°4°	0%	1 mph2 km/h from NW, gusts 4 mph7 km/h	100%	23%	0
Mon 9a	Sunny	43°6° (likely 41°5° to 49°9°)	43°6°	0%	2 mph3 km/h from W, gusts 5 mph8 km/h	93%	23%	1
Mon 10a	Sunny	49°9° (likely 47°8° to 54°12°)	48°9°	0%	3 mph5 km/h from W, gusts 9 mph14 km/h	80%	1%	2
Mon 11a	Sunny	57°14° (likely 53°12° to 58°14°)	57°14°	0%	3 mph5 km/h from W, gusts 10 mph17 km/h	64%	0%	3
Mon 12p	Sunny	61°16° (likely 58°14° to 62°17°)	61°16°	0%	3 mph5 km/h from W, gusts 10 mph17 km/h	58%	0%	4
Mon 1p	Sunny	65°18° (likely 61°16° to 65°18°)	65°18°	0%	5 mph8 km/h from NW, gusts 11 mph17 km/h	52%	0%	4
Mon 2p	Sunny	67°19° (likely 64°18° to 67°19°)	67°19°	0%	5 mph8 km/h from NW, gusts 11 mph18 km/h	49%	0%	4

Days ahead

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

Today, Oct 24. Sunny. High 62°17°, low 36°2°. Typical 62°17° / 44°7°. Dry. Mostly agree.
1. Afternoon
  noon–6 PM
  Sunny, 62°17°
  Dry
2. Evening
  6 PM–midnight
  Clear, 48°9°
  Dry
3. Overnight
  midnight–6 AM
  Clear, 37°3°
  Dry
Official NWS forecast
Today: Sunny, with a high near 62. Southeast wind around 5 mph.
Tonight: Patchy frost after 4am. Clear, with a low around 36. Northeast wind 0 to 3 mph.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
60°16°–63°17°
Low, likely
36°2°–39°4°
Typical high / low
62°17° / 44°7°
Wind
7 mph11 km/h, gusts 15 mph24 km/h
UV peak
4
Tomorrow, Oct 25. Sunny. High 64°18°, low 38°3°. Typical 61°16° / 43°6°. Dry. Forecasts agree.
1. Morning
  6 AM–noon
  Sunny, 37°3°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 64°18°
  Dry
3. Evening
  6 PM–midnight
  Clear, 53°12°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 39°4°
  Dry
Official NWS forecast
Day: Patchy frost before 9am. Sunny, with a high near 64. Southeast wind around 1 mph.
Night: Clear, with a low around 38. West wind around 1 mph.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
63°17°–65°18°
Low, likely
38°3°–41°5°
Typical high / low
61°16° / 43°6°
Wind
6 mph9 km/h
UV peak
4
Monday, Oct 26. Mostly sunny. High 69°21°, low 47°8°. Typical 61°16° / 43°6°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 39°4°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 67°19°
  Dry
3. Evening
  6 PM–midnight
  Clear, 55°13°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 48°9°
  Dry
Official NWS forecast
Day: Sunny, with a high near 69. Northwest wind 1 to 5 mph.
Night: Mostly clear, with a low around 47.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
65°18°–69°21°
Low, likely
38°3°–47°8°
Typical high / low
61°16° / 43°6°
Wind
8 mph13 km/h, gusts 15 mph24 km/h
UV peak
4
Tuesday, Oct 27. Mostly sunny. High 67°19°, low 45°7°. Typical 60°16° / 42°6°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 47°8°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 65°18°
  Dry
3. Evening
  6 PM–midnight
  Clear, 54°12°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 45°7°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Sunny, with a high near 67.
Night: Mostly clear, with a low around 45.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
64°18°–67°19°
Low, likely
45°7°–49°9°
Typical high / low
60°16° / 42°6°
Wind
10 mph17 km/h, gusts 21 mph33 km/h
UV peak
4
Wednesday, Oct 28. Cloudy. High 65°18°, low 47°8°. Typical 60°16° / 42°6°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Cloudy, 45°7°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 63°17°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 54°12°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 47°9°
  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 47.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
61°16°–65°18°
Low, likely
41°5°–47°8°
Typical high / low
60°16° / 42°6°
Wind
8 mph13 km/h, gusts 18 mph29 km/h
UV peak
4
Thursday, Oct 29. Cloudy. High 70°21°, low 49°9°. Typical 60°16° / 42°6°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Mostly sunny, 47°8°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 67°19°
  Dry
3. Evening
  6 PM–midnight
  Clear, 56°13°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 48°9°
  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 49.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
65°18°–70°21°
Low, likely
45°7°–49°9°
Typical high / low
60°16° / 42°6°
Wind
8 mph13 km/h, gusts 24 mph38 km/h
UV peak
4
Friday, Oct 30. Mostly sunny. High 74°23°, low 50°10°. Typical 60°16° / 41°5°. Dry. Forecasts agree.
1. Morning
  6 AM–noon
  Sunny, 48°9°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 73°23°
  Dry
3. Evening
  6 PM–midnight
  Clear, 60°16°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 52°11°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Sunny, with a high near 74.
Night: Mostly clear, with a low around 50.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
73°23°–74°23°
Low, likely
44°7°–50°10°
Typical high / low
60°16° / 41°5°
Wind
7 mph11 km/h, gusts 29 mph47 km/h
UV peak
4
Saturday, Oct 31. Cloudy. High 71°22°, low 50°10°. Typical 59°15° / 41°5°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Mostly sunny, 51°11°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 72°22°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 60°16°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 55°13°
  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°–75°24°
Low, likely
46°8°–54°12°
Typical high / low
59°15° / 41°5°
Wind
7 mph12 km/h, gusts 29 mph47 km/h
UV peak
4
Sunday, Nov 1. Cloudy. High 69°21°, low 54°12°. Typical 59°15° / 41°5°. Rain 0.02 in0.5 mm, 30% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Cloudy, 56°13°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 69°20°
  30% chance
3. Evening
  6 PM–midnight
  Drizzle, 64°18°
  30% chance · 0.02 in0.5 mm
4. Overnight
  midnight–6 AM
  Drizzle, 62°17°
  20% chance · 0.07 in1.7 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
64°18°–72°22°
Low, likely
51°11°–56°13°
Typical high / low
59°15° / 41°5°
Wind
11 mph18 km/h, gusts 22 mph36 km/h
UV peak
2
Monday, Nov 2. Drizzle. High 71°22°, low 59°15°. Typical 58°14° / 40°4°. Rain 0.48 in12 mm, 30% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Drizzle, 63°17°
  20% chance · 0.02 in0.6 mm
2. Afternoon
  noon–6 PM
  Drizzle, 71°22°
  Dry
3. Evening
  6 PM–midnight
  Drizzle, 64°18°
  20% chance · 0.37 in9.4 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
63°17°–77°25°
Low, likely
54°12°–65°18°
Typical high / low
58°14° / 40°4°
Wind
18 mph29 km/h, gusts 37 mph59 km/h

10 days15 days30 days

The outlook

Today
Dry, high 62°, low 36°.
Tomorrow
Dry, high 64°, low 38°.
Monday
Dry, high 69°, low 47°, warming up.
Rest of week
Mostly dry, highs 65–74°.

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

Seneca Creek at Dawsonville

5.0 mi

Below flood stage

Level: 1.9 ft
Flow: 44 cfs

Forecast peak 2.0 ft Sat 8 PM

Reading from Sat 1:50 PM · NWS gauge page

Little Seneca Creek Tributary Near Germantown, MD

1.8 mi

Below flood stage

Level: 0.5 ft
Flow: 1 cfs

Reading from Sat 1:40 PM · NWS gauge page

Cabin Branch Near Boyds, MD - 01644380

2.6 mi

Level: 4.2 ft

Reading from Sat 1 PM · NWS gauge page

Little Seneca Creek Tributary at Brink, MD

3.4 mi

Below flood stage

Level: 4.7 ft
Flow: 1 cfs

Reading from Sat 12:55 PM · NWS gauge page

For your home

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

Heating this week

About 66% less heating than a typical week.

This week 33Typical 95

Heating degree days, base 65°F

Heat-pump hours, next 7 days

h below 47°F: 26
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 19 hours are near freezing and damp, when outdoor units defrost more often.

Comfort

Dry air outside (dew point 39°F).

Open the windows?

Today, 4:00 PM–5:00 PM

Good stretch to open the windows.

Is this typical?

Damascus 3 Ssw · official normals 1991–2020 · records 1993–2026

Oct 24, today vs a typical year

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

Last 7 days vs normal

On average 2°1° colder than normal (daily mean temperature).

−8°−4°SunOct 18
−3°−2°MonOct 19
+1°TueOct 20
−1°WedOct 21
+1°ThuOct 22
±0°FriOct 23
—SatOct 24

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

Sun & moon

Sun

Daylight: 10 h 50 min; Losing 2 min 21 s a day; shortest Dec 21, 1 h 25 min less
Golden hour: 5:40–6:34 PM; Morning 7:11–8:05 AM
Blue hour: 6:34–6:45 PM; Morning 7:00–7:11 AM; first light 7:00 AM

Stars tonight? Fair

Clear 6:45 PM–7:01 AM, but the moon is 99% lit and up.

Moon

Waxing gibbous

97% lit · growing

Today: sets 5:40 AM · rises 5:14 PM
Full moon: Oct 26
New moon: Nov 9

Looking west from Germantown. The highest point on the skyline is about 2,500 ft, 27 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

Germantown, MD weather

Next 2 hours

Next 48 hours

Days ahead

The outlook

Today

Tomorrow

Monday

Rest of week

What changed since yesterday

Radar

Rivers

Seneca Creek at Dawsonville

Little Seneca Creek Tributary Near Germantown, MD

Cabin Branch Near Boyds, MD - 01644380

Little Seneca Creek Tributary at Brink, MD

For your home

Heating this week

Heat-pump hours, next 7 days

Comfort

Open the windows?

Is this typical?

Oct 24, today vs a typical year

Last 7 days vs normal

Sun & moon

Sun

Stars tonight? Fair

Moon