Frost Advisory
Starts in 56 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 11:50 PM EDT at KGAI

Spencerville, MD weather

Clear and 43°6°.

Forecasts agree

Now 43°6°

Clear

Wind: Calm; Light through 12 PM
Dew point: 43°6°; Comfortable
Humidity: 100%; Air 43°6°, dew point 43°6° · fog or dew likely
UV index: 0Low; Moderate 11 AM–5 PM · peak 4
Air quality: 41Good; PM2.5 (fine particles) · tomorrow moderate
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

Good hours for

Low 40°4° tonight at 5 AM
Above 50°10° today by 10 AM
High 64°18° today at 3 PM
Below 50°10° tonight after 9 PM

TonightDown to 40°4° by 5 AM · Clear
This morningUp to 56°13° by 11 AM · Clear
This afternoonUp to 64°18° by 3 PM · Clear
TonightDown to 40°4° by 5 AM · Clear
Tomorrow morningUp to 57°14° by 11 AM · Clear
Tomorrow afternoonUp to 68°20° by 3 PM · Clear
Tomorrow nightDown to 50°10° 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 44°7° to 47°8°)	45°7°	0%	2 mph3 km/h from E, gusts 5 mph7 km/h	86%	12%	0
Sun 1a	Clear	44°7° (likely 43°6° to 46°8°)	44°7°	0%	2 mph3 km/h from E, gusts 2 mph4 km/h	89%	7%	0
Sun 2a	Clear	43°6° (likely 42°6° to 45°7°)	43°6°	0%	1 mph2 km/h from E, gusts 4 mph6 km/h	89%	2%	0
Sun 3a	Clear	42°6° (likely 41°5° to 44°7°)	42°6°	0%	2 mph3 km/h from E, gusts 5 mph7 km/h	93%	2%	0
Sun 4a	Clear	41°5° (likely 40°4° to 44°7°)	41°5°	0%	2 mph3 km/h from NE, gusts 4 mph6 km/h	92%	0%	0
Sun 5a	Clear	40°4° (likely 40°4° to 43°6°)	40°4°	0%	2 mph3 km/h from NE, gusts 4 mph7 km/h	96%	0%	0
Sun 6a	Clear	40°4° (likely 39°4° to 42°6°)	40°4°	0%	2 mph3 km/h from NE, gusts 4 mph6 km/h	96%	0%	0
Sun 7a	Sunny	40°4° (likely 39°4° to 42°6°)	40°4°	0%	2 mph3 km/h from NE, gusts 5 mph7 km/h	92%	0%	0
Sun 8a	Sunny	40°4° (likely 39°4° to 43°6°)	40°4°	0%	2 mph3 km/h from N, gusts 5 mph8 km/h	96%	1%	0
Sun 9a	Sunny	44°7° (likely 44°7° to 47°8°)	44°7°	0%	1 mph2 km/h from NE, gusts 6 mph9 km/h	89%	1%	1
Sun 10a	Sunny	52°11° (likely 52°11° to 54°12°)	52°11°	0%	1 mph2 km/h from E, gusts 6 mph9 km/h	74%	1%	2
Sun 11a	Sunny	56°13° (likely 56°13° to 58°14°)	56°13°	0%	2 mph3 km/h from E, gusts 5 mph8 km/h	66%	1%	3
Sun 12p	Sunny	58°14° (likely 58°14° to 61°16°)	58°14°	0%	2 mph3 km/h from SE, gusts 6 mph9 km/h	59%	2%	4
Sun 1p	Sunny	61°16° (likely 61°16° to 63°17°)	61°16°	0%	1 mph2 km/h from SE, gusts 6 mph9 km/h	51%	3%	4
Sun 2p	Sunny	63°17° (likely 62°17° to 64°18°)	63°17°	0%	1 mph2 km/h from S, gusts 6 mph9 km/h	48%	4%	4
Sun 3p	Sunny	64°18° (likely 63°17° to 64°18°)	64°18°	0%	2 mph3 km/h from S, gusts 6 mph9 km/h	46%	4%	4
Sun 4p	Sunny	64°18° (likely 63°17° to 64°18°)	64°18°	0%	1 mph2 km/h from S, gusts 6 mph9 km/h	46%	3%	3
Sun 5p	Sunny	64°18° (likely 62°17° to 64°18°)	64°18°	0%	1 mph2 km/h from S, gusts 6 mph10 km/h	46%	1%	1
Sun 6p	Clear	60°16° (likely 58°14° to 60°16°)	60°16°	0%	1 mph2 km/h from SE, gusts 5 mph8 km/h	53%	1%	0
Sun 7p	Clear	57°14° (likely 54°12° to 57°14°)	57°14°	0%	1 mph2 km/h from SE, gusts 5 mph8 km/h	62%	3%	0
Sun 8p	Clear	53°12° (likely 52°11° to 54°12°)	53°12°	0%	1 mph2 km/h from SE, gusts 6 mph9 km/h	71%	1%	0
Sun 9p	Clear	48°9° (likely 48°9° to 52°11°)	48°9°	0%	1 mph2 km/h from S, gusts 6 mph10 km/h	83%	0%	0
Sun 10p	Clear	47°8° (likely 47°8° to 50°10°)	47°8°	0%	1 mph2 km/h from S, gusts 7 mph11 km/h	86%	0%	0
Sun 11p	Clear	46°8° (likely 46°8° to 49°9°)	46°8°	0%	1 mph2 km/h from S, gusts 6 mph9 km/h	89%	0%	0
Mon 12a	Clear	44°7° (likely 44°7° to 49°9°)	44°7°	0%	1 mph2 km/h from S, gusts 6 mph10 km/h	96%	0%	0
Mon 1a	Clear	43°6° (likely 43°6° to 48°9°)	43°6°	0%	1 mph2 km/h from W, gusts 6 mph9 km/h	96%	0%	0
Mon 2a	Clear	43°6° (likely 43°6° to 47°8°)	43°6°	0%	1 mph2 km/h from W, gusts 6 mph9 km/h	96%	0%	0
Mon 3a	Clear	42°6° (likely 42°6° to 46°8°)	42°6°	0%	1 mph2 km/h from W, gusts 4 mph7 km/h	96%	0%	0
Mon 4a	Clear	41°5° (likely 41°5° to 45°7°)	41°5°	0%	2 mph3 km/h from W, gusts 5 mph8 km/h	100%	2%	0
Mon 5a	Clear	40°4° (likely 40°4° to 44°7°)	40°4°	0%	2 mph3 km/h from W, gusts 6 mph10 km/h	100%	2%	0
Mon 6a	Clear	40°4° (likely 40°4° to 43°6°)	40°4°	0%	2 mph3 km/h from W, gusts 6 mph10 km/h	100%	11%	0
Mon 7a	Sunny	40°4° (likely 40°4° to 43°6°)	40°4°	0%	2 mph3 km/h from W, gusts 6 mph10 km/h	100%	15%	0
Mon 8a	Sunny	40°4° (likely 40°4° to 44°7°)	38°3°	0%	3 mph5 km/h from W, gusts 6 mph10 km/h	96%	16%	0
Mon 9a	Sunny	45°7° (likely 45°7° to 48°9°)	44°7°	0%	3 mph5 km/h from W, gusts 7 mph11 km/h	93%	15%	1
Mon 10a	Sunny	51°11° (likely 51°11° to 54°12°)	51°11°	0%	3 mph5 km/h from W, gusts 11 mph17 km/h	80%	5%	2
Mon 11a	Sunny	57°14° (likely 57°14° to 59°15°)	57°14°	0%	5 mph8 km/h from W, gusts 11 mph17 km/h	67%	8%	3
Mon 12p	Sunny	61°16° (likely 61°16° to 63°17°)	61°16°	0%	5 mph8 km/h from W, gusts 11 mph17 km/h	58%	0%	4
Mon 1p	Sunny	64°18° (likely 64°18° to 66°19°)	64°18°	0%	6 mph10 km/h from NW, gusts 11 mph18 km/h	52%	0%	4
Mon 2p	Sunny	66°19° (likely 66°19° to 67°19°)	66°19°	0%	6 mph10 km/h from NW, gusts 11 mph17 km/h	48%	0%	4
Mon 3p	Sunny	68°20° (likely 67°19° to 68°20°)	68°20°	0%	7 mph11 km/h from NW, gusts 11 mph17 km/h	45%	0%	4
Mon 4p	Sunny	68°20° (likely 67°19° to 68°20°)	68°20°	0%	5 mph8 km/h from NW, gusts 10 mph16 km/h	47%	0%	3
Mon 5p	Sunny	68°20° (likely 66°19° to 68°20°)	68°20°	0%	5 mph8 km/h from NW, gusts 10 mph17 km/h	49%	0%	1
Mon 6p	Clear	65°18° (likely 62°17° to 65°18°)	65°18°	0%	5 mph8 km/h from NW, gusts 7 mph11 km/h	54%	0%	0
Mon 7p	Clear	61°16° (likely 56°13° to 61°16°)	61°16°	0%	3 mph5 km/h from NW, gusts 6 mph10 km/h	60%	0%	0
Mon 8p	Clear	57°14° (likely 54°12° to 57°14°)	57°14°	0%	3 mph5 km/h from NW, gusts 5 mph9 km/h	69%	20%	0
Mon 9p	Clear	54°12° (likely 51°11° to 58°14°)	54°12°	0%	3 mph5 km/h from NW, gusts 5 mph8 km/h	74%	1%	0
Mon 10p	Clear	52°11° (likely 50°10° to 57°14°)	52°11°	0%	3 mph5 km/h from NW, gusts 7 mph11 km/h	80%	1%	0
Mon 11p	Clear	50°10° (likely 49°9° to 56°13°)	49°9°	0%	3 mph5 km/h from NW, gusts 6 mph10 km/h	86%	1%	0

Days ahead

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

Today, Oct 25. Sunny. High 64°18°, low 38°3°. Typical 65°18° / 43°6°. Dry. Forecasts agree.
1. Morning
  6 AM–noon
  Sunny, 40°4°
  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, 40°4°
  Dry
Official NWS forecast
Today: Sunny, with a high near 64. East wind around 2 mph.
Tonight: Mostly clear, with a low around 38. East wind around 2 mph.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
63°17°–65°18°
Low, likely
38°3°–42°6°
Typical high / low
65°18° / 43°6°
Wind
6 mph9 km/h
UV peak
4
Tomorrow, Oct 26. Sunny. High 69°21°, low 47°8°. Typical 64°18° / 43°6°. Dry. Forecasts agree.
1. Morning
  6 AM–noon
  Sunny, 40°4°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 68°20°
  Dry
3. Evening
  6 PM–midnight
  Clear, 57°14°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 52°11°
  Dry
Official NWS forecast
Day: Sunny, with a high near 69. West wind 2 to 7 mph.
Night: Clear, with a low around 47. Northwest wind around 6 mph.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
67°19°–69°21°
Low, likely
39°4°–47°8°
Typical high / low
64°18° / 43°6°
Wind
7 mph12 km/h, gusts 15 mph24 km/h
UV peak
4
Tuesday, Oct 27. Mostly sunny. High 67°19°, low 45°7°. Typical 64°18° / 42°6°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 51°10°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 66°19°
  Dry
3. Evening
  6 PM–midnight
  Partly cloudy, 55°13°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 47°8°
  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°–69°21°
Low, likely
45°7°–51°11°
Typical high / low
64°18° / 42°6°
Wind
8 mph13 km/h, gusts 19 mph31 km/h
UV peak
4
Wednesday, Oct 28. Cloudy. High 64°18°, low 47°8°. Typical 64°18° / 42°6°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Mostly sunny, 47°8°
  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, 48°9°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Mostly sunny, with a high near 64.
Night: Mostly cloudy, with a low around 47.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
62°17°–65°18°
Low, likely
43°6°–49°9°
Typical high / low
64°18° / 42°6°
Wind
7 mph11 km/h, gusts 14 mph23 km/h
UV peak
4
Thursday, Oct 29. Partly sunny. High 69°21°, low 49°9°. Typical 63°17° / 42°6°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Cloudy, 47°8°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 67°20°
  Dry
3. Evening
  6 PM–midnight
  Clear, 58°14°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 50°10°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Mostly sunny, with a high near 69.
Night: Mostly clear, with a low around 49.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
67°19°–69°21°
Low, likely
45°7°–50°10°
Typical high / low
63°17° / 42°6°
Wind
7 mph11 km/h, gusts 22 mph35 km/h
UV peak
4
Friday, Oct 30. Mostly sunny. High 73°23°, low 50°10°. Typical 63°17° / 41°5°. Dry. Forecasts agree.
1. Morning
  6 AM–noon
  Sunny, 49°10°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 74°23°
  Dry
3. Evening
  6 PM–midnight
  Clear, 62°17°
  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 73.
Night: Mostly clear, with a low around 50.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
73°23°–75°24°
Low, likely
45°7°–52°11°
Typical high / low
63°17° / 41°5°
Wind
6 mph9 km/h, gusts 13 mph21 km/h
UV peak
4
Saturday, Oct 31. Partly sunny. High 71°22°, low 51°11°. Typical 62°17° / 41°5°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Partly sunny, 51°10°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 69°21°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 58°15°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 54°12°
  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
63°17°–72°22°
Low, likely
46°8°–56°13°
Typical high / low
62°17° / 41°5°
Wind
8 mph13 km/h, gusts 17 mph28 km/h
UV peak
3
Sunday, Nov 1. Cloudy. High 70°21°, low 53°12°. Typical 62°17° / 41°5°. Rain 0.03 in0.8 mm, 30% chance. Mostly agree.
1. Morning
  6 AM–noon
  Cloudy, 53°12°
  20% chance
2. Afternoon
  noon–6 PM
  Cloudy, 70°21°
  20% chance
3. Evening
  6 PM–midnight
  Drizzle, 65°18°
  20% chance · 0.05 in1.2 mm
4. Overnight
  midnight–6 AM
  Drizzle, 61°16°
  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
67°19°–73°23°
Low, likely
50°10°–55°13°
Typical high / low
62°17° / 41°5°
Wind
9 mph15 km/h, gusts 28 mph45 km/h
UV peak
4
Monday, Nov 2. Showers. High 72°22°, low 60°16°. Typical 62°17° / 40°4°. Rain 0.39 in9.9 mm, 30% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Drizzle, 62°17°
  20% chance · 0.12 in2.9 mm
2. Afternoon
  noon–6 PM
  Drizzle, 72°22°
  20% chance · 0.04 in1 mm
3. Evening
  6 PM–midnight
  Clear, 64°18°
  20% chance · 0.2 in5 mm
4. Overnight
  midnight–6 AM
  Clear, 57°14°
  20% chance · 0.15 in3.9 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
70°21°–77°25°
Low, likely
56°13°–67°19°
Typical high / low
62°17° / 40°4°
Wind
16 mph26 km/h, gusts 37 mph59 km/h
UV peak
3
Tuesday, Nov 3. Cloudy. High 71°22°, low 56°13°. Typical 61°16° / 40°4°. Rain 0.1 in2.5 mm, 20% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Sunny, 59°15°
  20% chance · 0.03 in0.9 mm
2. Afternoon
  noon–6 PM
  Cloudy, 72°22°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 62°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
66°19°–78°26°
Low, likely
52°11°–60°16°
Typical high / low
61°16° / 40°4°
Wind
15 mph23 km/h, gusts 33 mph53 km/h
UV peak
4

10 days15 days30 days

The outlook

Today
Dry, high 64°, low 38°.
Tomorrow
Dry, high 69°, low 47°, warming up.
Tuesday
Dry, high 67°, low 45°.
Rest of week
Mostly dry, highs 64–73°.

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 Tributary Near Colesville, MD

2.2 mi

Below flood stage

Level: 1.6 ft
Flow: under 1 cfs

Reading from Sat 9:50 PM · NWS gauge page

Hawlings River near Sandy Spring

4.3 mi

Below flood stage

Level: 0.5 ft
Flow: 5 cfs

Reading from Sat 10:45 PM · NWS gauge page

Northwest Branch at Kemp Mill

4.5 mi

Below flood stage

Level: 1.4 ft
Flow: 2 cfs

Reading from Sat 9:45 PM · NWS gauge page

Little Paint Branch at Beltsville / Briggs Chaney Road

5.1 mi

Level: 1.0 ft

Reading from Sat 10:15 PM · NWS gauge page

For your home

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

Heating this week

About 69% less heating than a typical week.

This week 27Typical 86

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 12 hours are near freezing and damp, when outdoor units defrost more often.

Comfort

Dry air outside (dew point 43°F).

Open the windows?

Today, 1:00 PM–6:00 PM

Good stretch to open the windows.

Is this typical?

BELTSVILLE · official normals 1991–2020 · records 1941–2026

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

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

Sun & moon

Sun

Daylight: 10 h 47 min; Losing 2 min 16 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 12:04–7 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 Spencerville. The highest point on the skyline is about 2,800 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

Spencerville, MD weather

Next 2 hours

Next 48 hours

Days ahead

The outlook

Today

Tomorrow

Tuesday

Rest of week

What changed since yesterday

Radar

Rivers

Paint Branch Tributary Near Colesville, MD

Hawlings River near Sandy Spring

Northwest Branch at Kemp Mill

Little Paint Branch at Beltsville / Briggs Chaney 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