Frost Advisory
Starts in 8 h 4 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 3:54 PM EDT at KRSP

Thurmont, MD weather

Sunny and 56°13°, jacket by 7 PM.

Forecasts agree

Now 56°13°

Sunny

Wind: 3 mph5 km/h; From the southeast. Light through 4 AM
Dew point: 48°9°; Comfortable · down to 38°3° by 5 PM
UV tomorrow: 4Moderate; Moderate 11 AM–5 PM · peak 4
Air quality: 33Good; Ozone · tomorrow moderate

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 39°4° tomorrow at 7 AM
Above 50°10° tomorrow by 10 AM
High 62°17° tomorrow at 2 PM

This afternoonNear 60°16° · Clear
TonightDown to 40°4° by 5 AM · Clear
Tomorrow morningUp to 54°12° by 11 AM · Clear
Tomorrow afternoonUp to 62°17° by 2 PM · Clear
Tomorrow nightDown to 41°5° by 5 AM · Clear
Monday morningUp to 57°14° by 11 AM · Clear
Monday afternoonUp to 67°19° 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
Sat 4p	Sunny	60°16° (likely 59°15° to 60°16°)	60°16°	0%	3 mph5 km/h from SE, gusts 6 mph10 km/h	46%	0%	1
Sat 5p	Sunny	60°16° (likely 58°14° to 60°16°)	60°16°	0%	3 mph5 km/h from SE, gusts 6 mph10 km/h	44%	1%	1
Sat 6p	Clear	56°13° (likely 54°12° to 57°14°)	56°13°	0%	3 mph5 km/h from SE, gusts 5 mph8 km/h	51%	0%	0
Sat 7p	Clear	52°11° (likely 50°10° to 54°12°)	52°11°	0%	2 mph3 km/h from E, gusts 3 mph5 km/h	59%	2%	0
Sat 8p	Clear	49°9° (likely 48°9° to 52°11°)	49°9°	0%	1 mph2 km/h from SE, gusts 3 mph4 km/h	63%	3%	0
Sat 9p	Clear	47°8° (likely 46°8° to 50°10°)	47°8°	0%	1 mph2 km/h from S, gusts 3 mph5 km/h	68%	0%	0
Sat 10p	Clear	46°8° (likely 44°7° to 50°10°)	46°8°	0%	2 mph3 km/h from S, gusts 4 mph6 km/h	73%	0%	0
Sat 11p	Clear	45°7° (likely 42°6° to 49°9°)	45°7°	0%	2 mph3 km/h from S, gusts 4 mph6 km/h	76%	0%	0
Sun 12a	Clear	44°7° (likely 41°5° to 49°9°)	44°7°	0%	2 mph3 km/h from S, gusts 4 mph6 km/h	76%	0%	0
Sun 1a	Clear	44°7° (likely 40°4° to 48°9°)	44°7°	0%	2 mph3 km/h from S, gusts 4 mph6 km/h	76%	0%	0
Sun 2a	Clear	42°6° (likely 39°4° to 48°9°)	42°6°	0%	2 mph3 km/h from S, gusts 4 mph7 km/h	82%	1%	0
Sun 3a	Clear	41°5° (likely 38°3° to 47°8°)	41°5°	0%	1 mph2 km/h from S, gusts 2 mph4 km/h	85%	0%	0
Sun 4a	Clear	41°5° (likely 38°3° to 45°7°)	41°5°	0%	1 mph2 km/h from S, gusts 2 mph3 km/h	89%	1%	0
Sun 5a	Clear	40°4° (likely 37°3° to 44°7°)	40°4°	0%	1 mph2 km/h from S, gusts 2 mph3 km/h	92%	5%	0
Sun 6a	Clear	40°4° (likely 37°3° to 45°7°)	40°4°	0%	1 mph2 km/h from S, gusts 1 mph2 km/h	92%	2%	0
Sun 7a	Clear	39°4° (likely 37°3° to 43°6°)	39°4°	0%	1 mph2 km/h from SW, gusts 1 mph2 km/h	96%	2%	0
Sun 8a	Sunny	40°4° (likely 36°2° to 44°7°)	40°4°	0%	1 mph2 km/h from SW, gusts 2 mph3 km/h	92%	12%	0
Sun 9a	Sunny	44°7° (likely 39°4° to 48°9°)	44°7°	0%	1 mph2 km/h from SW, gusts 3 mph5 km/h	82%	13%	1
Sun 10a	Sunny	50°10° (likely 49°9° to 53°12°)	50°10°	0%	2 mph3 km/h from S, gusts 5 mph8 km/h	74%	2%	2
Sun 11a	Sunny	54°12° (likely 54°12° to 56°13°)	54°12°	0%	1 mph2 km/h from S, gusts 5 mph9 km/h	66%	3%	3
Sun 12p	Sunny	57°14° (likely 57°14° to 59°15°)	57°14°	0%	2 mph3 km/h from S, gusts 7 mph11 km/h	59%	3%	4
Sun 1p	Sunny	59°15° (likely 59°15° to 61°16°)	59°15°	0%	2 mph3 km/h from S, gusts 8 mph13 km/h	55%	5%	4
Sun 2p	Sunny	62°17° (likely 61°16° to 62°17°)	62°17°	0%	3 mph5 km/h from S, gusts 9 mph14 km/h	50%	5%	4
Sun 3p	Sunny	62°17° (likely 62°17° to 63°17°)	62°17°	0%	3 mph5 km/h from S, gusts 8 mph13 km/h	50%	2%	4
Sun 4p	Sunny	62°17° (likely 62°17° to 63°17°)	62°17°	0%	3 mph5 km/h from S, gusts 8 mph13 km/h	52%	2%	3
Sun 5p	Sunny	62°17° (likely 61°16° to 62°17°)	62°17°	0%	3 mph5 km/h from S, gusts 8 mph13 km/h	54%	2%	1
Sun 6p	Clear	58°14° (likely 56°13° to 59°15°)	58°14°	0%	2 mph3 km/h from S, gusts 6 mph10 km/h	59%	0%	0
Sun 7p	Clear	55°13° (likely 52°11° to 55°13°)	55°13°	0%	1 mph2 km/h from S, gusts 5 mph7 km/h	64%	0%	0
Sun 8p	Clear	50°10° (likely 50°10° to 54°12°)	50°10°	0%	1 mph2 km/h from S, gusts 5 mph8 km/h	77%	0%	0
Sun 9p	Clear	49°9° (likely 48°9° to 53°12°)	49°9°	0%	1 mph2 km/h from S, gusts 5 mph8 km/h	77%	0%	0
Sun 10p	Clear	47°8° (likely 46°8° to 53°12°)	47°8°	0%	1 mph2 km/h from S, gusts 5 mph8 km/h	83%	0%	0
Sun 11p	Clear	46°8° (likely 45°7° to 51°11°)	46°8°	0%	1 mph2 km/h from S, gusts 4 mph6 km/h	86%	0%	0
Mon 12a	Clear	46°8° (likely 44°7° to 49°9°)	46°8°	0%	1 mph2 km/h from S, gusts 3 mph5 km/h	86%	36%	0
Mon 1a	Clear	45°7° (likely 43°6° to 49°9°)	45°7°	0%	1 mph2 km/h from S, gusts 3 mph5 km/h	86%	6%	0
Mon 2a	Clear	44°7° (likely 41°5° to 47°8°)	44°7°	0%	1 mph2 km/h from S, gusts 3 mph5 km/h	89%	16%	0
Mon 3a	Clear	43°6° (likely 41°5° to 47°8°)	43°6°	0%	1 mph2 km/h from S, gusts 3 mph5 km/h	93%	16%	0
Mon 4a	Clear	42°6° (likely 40°4° to 47°8°)	42°6°	0%	1 mph2 km/h from SW, gusts 3 mph5 km/h	93%	13%	0
Mon 5a	Clear	41°5° (likely 40°4° to 47°8°)	41°5°	0%	1 mph2 km/h from SW, gusts 3 mph5 km/h	96%	12%	0
Mon 6a	Clear	40°4° (likely 40°4° to 45°7°)	40°4°	0%	1 mph2 km/h from SW, gusts 2 mph3 km/h	96%	13%	0
Mon 7a	Clear	40°4° (likely 40°4° to 44°7°)	40°4°	0%	1 mph2 km/h from SW, gusts 2 mph4 km/h	96%	12%	0
Mon 8a	Sunny	40°4° (likely 40°4° to 44°7°)	40°4°	0%	1 mph2 km/h from SW, gusts 2 mph3 km/h	96%	16%	0
Mon 9a	Sunny	46°8° (likely 44°7° to 48°9°)	46°8°	0%	1 mph2 km/h from W, gusts 2 mph4 km/h	86%	9%	1
Mon 10a	Sunny	52°11° (likely 52°11° to 55°13°)	52°11°	0%	1 mph2 km/h from W, gusts 6 mph10 km/h	74%	0%	2
Mon 11a	Sunny	57°14° (likely 57°14° to 61°16°)	57°14°	0%	1 mph2 km/h from W, gusts 8 mph12 km/h	64%	0%	3
Mon 12p	Sunny	60°16° (likely 60°16° to 65°18°)	60°16°	0%	3 mph5 km/h from W, gusts 8 mph13 km/h	60%	0%	4
Mon 1p	Sunny	64°18° (likely 64°18° to 67°19°)	64°18°	0%	5 mph8 km/h from NW, gusts 9 mph14 km/h	52%	0%	4
Mon 2p	Sunny	66°19° (likely 66°19° to 68°20°)	66°19°	0%	5 mph8 km/h from NW, gusts 10 mph16 km/h	50%	1%	4
Mon 3p	Sunny	67°19° (likely 66°19° to 69°21°)	67°19°	0%	5 mph8 km/h from NW, gusts 11 mph17 km/h	49%	2%	4

Days ahead

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

Today, Oct 24. Sunny. High 61°16°, low 38°3°. Typical 62°17° / 41°5°. Dry. Forecasts agree.
1. Afternoon
  noon–6 PM
  Sunny, 60°16°
  Dry
2. Evening
  6 PM–midnight
  Clear, 49°9°
  Dry
3. Overnight
  midnight–6 AM
  Clear, 40°4°
  Dry
Official NWS forecast
Today: Sunny, with a high near 61. Southeast wind around 3 mph.
Tonight: Clear, with a low around 38. South wind around 3 mph.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
60°16°–61°16°
Low, likely
34°1°–40°4°
Typical high / low
62°17° / 41°5°
Wind
7 mph11 km/h, gusts 15 mph24 km/h
UV peak
4
Tomorrow, Oct 25. Sunny. High 63°17°, low 39°4°. Typical 62°17° / 41°5°. Dry. Forecasts agree.
1. Morning
  6 AM–noon
  Sunny, 40°4°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 62°17°
  Dry
3. Evening
  6 PM–midnight
  Clear, 50°10°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 41°5°
  Dry
Official NWS forecast
Day: Sunny, with a high near 63. South wind around 3 mph.
Night: Mostly clear, with a low around 39. South wind around 2 mph.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
62°17°–63°17°
Low, likely
36°2°–43°6°
Typical high / low
62°17° / 41°5°
Wind
8 mph12 km/h
UV peak
4
Monday, Oct 26. Mostly sunny. High 69°21°, low 49°9°. Typical 62°17° / 41°5°. Dry. Forecasts agree.
1. Morning
  6 AM–noon
  Sunny, 40°4°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 67°20°
  Dry
3. Evening
  6 PM–midnight
  Clear, 54°12°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 50°10°
  Dry
Official NWS forecast
Day: Sunny, with a high near 69. West wind 1 to 5 mph.
Night: Mostly clear, with a low around 49.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
66°19°–69°21°
Low, likely
39°4°–49°9°
Typical high / low
62°17° / 41°5°
Wind
7 mph11 km/h, gusts 15 mph23 km/h
UV peak
4
Tuesday, Oct 27. Mostly sunny. High 66°19°, low 44°7°. Typical 61°16° / 40°4°. Dry. Forecasts agree.
1. Morning
  6 AM–noon
  Sunny, 49°10°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 65°18°
  Dry
3. Evening
  6 PM–midnight
  Clear, 52°11°
  Dry
4. Overnight
  midnight–6 AM
  Mostly clear, 43°6°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Sunny, with a high near 66.
Night: Mostly clear, with a low around 44.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
64°18°–66°19°
Low, likely
44°7°–50°10°
Typical high / low
61°16° / 40°4°
Wind
7 mph10 km/h, gusts 17 mph27 km/h
UV peak
4
Wednesday, Oct 28. Mostly cloudy. High 64°18°, low 47°8°. Typical 61°16° / 40°4°. Dry. Forecasts agree.
1. Morning
  6 AM–noon
  Cloudy, 43°6°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 62°17°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 53°11°
  Dry
4. Overnight
  midnight–6 AM
  Mostly clear, 46°8°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Partly sunny, with a high near 64.
Night: Mostly cloudy, with a low around 47.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
61°16°–64°18°
Low, likely
39°4°–47°8°
Typical high / low
61°16° / 40°4°
Wind
8 mph13 km/h, gusts 16 mph26 km/h
UV peak
4
Thursday, Oct 29. Cloudy. High 69°21°, low 50°10°. Typical 60°16° / 40°4°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Cloudy, 46°8°
  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, 49°9°
  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 50.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
65°18°–69°21°
Low, likely
42°6°–50°10°
Typical high / low
60°16° / 40°4°
Wind
7 mph12 km/h, gusts 21 mph34 km/h
UV peak
4
Friday, Oct 30. Mostly sunny. High 73°23°, low 52°11°. Typical 60°16° / 39°4°. 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, 58°15°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 51°10°
  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 52.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
72°22°–75°24°
Low, likely
45°7°–52°11°
Typical high / low
60°16° / 39°4°
Wind
7 mph12 km/h, gusts 21 mph33 km/h
UV peak
4
Saturday, Oct 31. Cloudy. High 70°21°, low 51°11°. Typical 60°16° / 39°4°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Partly sunny, 50°10°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 72°22°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 60°15°
  Dry
4. Overnight
  midnight–6 AM
  Partly cloudy, 54°12°
  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°–74°23°
Low, likely
48°9°–55°13°
Typical high / low
60°16° / 39°4°
Wind
6 mph10 km/h, gusts 22 mph36 km/h
UV peak
4
Sunday, Nov 1. Drizzle. High 67°19°, low 52°11°. Typical 59°15° / 38°3°. Rain 0.03 in0.8 mm, 40% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Cloudy, 57°14°
  20% chance
2. Afternoon
  noon–6 PM
  Cloudy, 67°19°
  30% chance
3. Evening
  6 PM–midnight
  Drizzle, 64°18°
  40% chance · 0.02 in0.5 mm
4. Overnight
  midnight–6 AM
  Drizzle, 61°16°
  30% chance · 0.07 in1.8 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
61°16°–71°22°
Low, likely
49°9°–55°13°
Typical high / low
59°15° / 38°3°
Wind
9 mph14 km/h, gusts 20 mph32 km/h
UV peak
1
Monday, Nov 2. Drizzle. High 70°21°, low 57°14°. Typical 59°15° / 38°3°. Rain 0.8 in20 mm, 30% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Drizzle, 62°17°
  30% chance · 0.06 in1.5 mm
2. Afternoon
  noon–6 PM
  Drizzle, 70°21°
  20% chance · 0.12 in3 mm
3. Evening
  6 PM–midnight
  Drizzle, 64°18°
  20% chance · 0.79 in20 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
62°17°–76°24°
Low, likely
52°11°–65°18°
Typical high / low
59°15° / 38°3°
Wind
15 mph24 km/h, gusts 35 mph56 km/h

10 days15 days30 days

The outlook

Today
Dry, high 61°, low 38°.
Tomorrow
Dry, high 63°, low 39°.
Monday
Dry, high 69°, low 49°, warming up.
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

Monocacy River near Frederick at Interstate 70

15 mi

Below flood stage

Level: 1.7 ft
Flow: 173 cfs

Forecast peak 1.7 ft Sat 8 PM

Reading from Sat 3:45 PM · NWS gauge page

Antietam Creek near Sharpsburg

21 mi

Below flood stage

Level: 2.4 ft
Flow: 103 cfs

Forecast peak 2.3 ft Sat 8 PM

Reading from Sat 3:15 PM · NWS gauge page

Conococheague Creek at Fairview

23 mi

Below flood stage

Level: 1.7 ft
Flow: 161 cfs

Forecast peak 1.6 ft Sat 8 PM

Reading from Sat 3:45 PM · NWS gauge page

Big Pipe Creek at Bruceville

9.1 mi

Below flood stage

Level: 1.0 ft
Flow: 24 cfs

Reading from Sat 4 PM · NWS gauge page

For your home

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

Heating this week

About 70% less heating than a typical week.

This week 30Typical 100

Heating degree days, base 65°F

Heat-pump hours, next 7 days

h below 47°F: 25
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 48°F).

Open the windows?

Sun, 2:00 PM–5:00 PM

Good stretch to open the windows.

Is this typical?

Hagerstown 1e · official normals 1991–2020 · records 1899–2026

Oct 24, today vs a typical year

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

Last 7 days vs normal

On average 4°2° colder than normal (daily mean temperature).

−7°−4°SunOct 18
−4°−2°MonOct 19
−2°−1°TueOct 20
−3°−2°WedOct 21
−4°−2°ThuOct 22
−3°−2°FriOct 23
—SatOct 24

Thurmont 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 26 min less
Golden hour: 5:40–6:34 PM; Morning 7:12–8:06 AM
Blue hour: 6:34–6:45 PM; Morning 7:01–7:12 AM; first light 7:01 AM

Stars tonight? Fair

Clear 6:45 PM–7:02 AM, but the moon is 99% lit and up.

Moon

Waxing gibbous

98% lit · growing

Today: sets 5:41 AM · rises 5:14 PM
Full moon: Oct 26
New moon: Nov 9

Looking west from Thurmont. The highest point on the skyline is about 1,700 ft, 3 mi away.Skyline from USGS elevation data, heights drawn up to 3.5× taller. Sky, sun and moon as they are now.

1 active weather alert

Frost Advisory

Thurmont, MD weather

Next 2 hours

Next 48 hours

Days ahead

The outlook

Today

Tomorrow

Monday

Rest of week

What changed since yesterday

Radar

Rivers

Monocacy River near Frederick at Interstate 70

Antietam Creek near Sharpsburg

Conococheague Creek at Fairview

Big Pipe Creek at Bruceville

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