Frost Advisory
Starts in 4 h 7 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 7:47 PM EDT at KFDK

Walkersville, MD weather

Clear and 46°8°.

Forecasts agree

Now 46°8°

Clear

Wind: Calm; Light through 8 AM
Dew point: 45°7°; Comfortable · down to 36°2° by 4 AM
Humidity: 93%; Air 46°8°, dew point 45°7° · fog or dew likely
UV tomorrow: 4Moderate; Moderate 11 AM–5 PM · peak 4
Air quality: 26Good; Ozone · tomorrow moderate
Pressure: 30.55 inHg1035 hPa; Rising slowly · +0.03 inHg+1.0 hPa in 3 h

No precipitation expected in the next 2 hours.

From forecast models

Next 48 hours

Good hours for

Low 35°2° tomorrow at 6 AM
Above 50°10° tomorrow by 11 AM
High 63°17° tomorrow at 2 PM
Below 50°10° tomorrow night after 9 PM

TonightDown to 36°2° by 5 AM · Clear
Tomorrow morningUp to 54°12° by 11 AM · Clear
Tomorrow afternoonUp to 63°17° by 2 PM · Clear
Tomorrow nightDown to 38°3° by 5 AM · Clear
Monday morningUp to 56°13° by 11 AM · Clear
Monday 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
Sat 8p	Clear	50°10° (likely 48°9° to 54°12°)	50°10°	0%	2 mph3 km/h from SE, gusts 6 mph10 km/h	68%	48%	0
Sat 9p	Clear	46°8° (likely 45°7° to 53°12°)	46°8°	0%	1 mph2 km/h from SE, gusts 4 mph7 km/h	76%	31%	0
Sat 10p	Clear	44°7° (likely 42°6° to 50°10°)	44°7°	0%	1 mph2 km/h from SE, gusts 4 mph7 km/h	82%	11%	0
Sat 11p	Clear	42°6° (likely 40°4° to 48°9°)	42°6°	0%	1 mph2 km/h from SE, gusts 3 mph5 km/h	89%	0%	0
Sun 12a	Clear	41°5° (likely 38°3° to 46°8°)	41°5°	0%	1 mph2 km/h from SE, gusts 2 mph3 km/h	89%	5%	0
Sun 1a	Clear	41°5° (likely 37°3° to 46°8°)	41°5°	0%	1 mph2 km/h from E, gusts 3 mph5 km/h	89%	6%	0
Sun 2a	Clear	38°3° (likely 36°2° to 45°7°)	38°3°	0%	1 mph2 km/h from E, gusts 2 mph4 km/h	96%	6%	0
Sun 3a	Clear	38°3° (likely 36°2° to 44°7°)	38°3°	0%	2 mph3 km/h from E, gusts 3 mph4 km/h	96%	7%	0
Sun 4a	Clear	37°3° (likely 36°2° to 42°6°)	37°3°	0%	2 mph3 km/h from E, gusts 3 mph5 km/h	96%	11%	0
Sun 5a	Clear	36°2° (likely 35°2° to 42°6°)	36°2°	0%	2 mph3 km/h from E, gusts 2 mph3 km/h	96%	10%	0
Sun 6a	Clear	35°2° (likely 34°1° to 40°4°)	35°2°	0%	2 mph3 km/h from E, gusts 4 mph6 km/h	96%	13%	0
Sun 7a	Sunny	35°2° (likely 33°1° to 39°4°)	35°2°	0%	1 mph2 km/h from E, gusts 3 mph5 km/h	96%	13%	0
Sun 8a	Sunny	35°2° (likely 33°1° to 39°4°)	35°2°	0%	1 mph2 km/h from E, gusts 3 mph4 km/h	100%	12%	0
Sun 9a	Sunny	41°5° (likely 38°3° to 44°7°)	41°5°	0%	1 mph2 km/h from E, gusts 3 mph5 km/h	92%	12%	1
Sun 10a	Sunny	48°9° (likely 48°9° to 50°10°)	48°9°	0%	1 mph2 km/h from S, gusts 2 mph4 km/h	80%	2%	2
Sun 11a	Sunny	54°12° (likely 53°12° to 55°13°)	54°12°	0%	0 mph0 km/h, gusts 5 mph8 km/h	69%	3%	3
Sun 12p	Sunny	57°14° (likely 57°14° to 60°16°)	57°14°	0%	0 mph0 km/h, gusts 7 mph11 km/h	62%	2%	4
Sun 1p	Sunny	60°16° (likely 60°16° to 62°17°)	60°16°	0%	1 mph2 km/h from S, gusts 7 mph11 km/h	55%	2%	4
Sun 2p	Sunny	63°17° (likely 61°16° to 63°17°)	63°17°	0%	1 mph2 km/h from S, gusts 7 mph11 km/h	50%	5%	4
Sun 3p	Sunny	63°17° (likely 62°17° to 64°18°)	63°17°	0%	1 mph2 km/h from S, gusts 7 mph11 km/h	50%	4%	4
Sun 4p	Sunny	63°17° (likely 62°17° to 64°18°)	63°17°	0%	1 mph2 km/h from S, gusts 7 mph12 km/h	52%	1%	3
Sun 5p	Sunny	63°17° (likely 61°16° to 63°17°)	63°17°	0%	1 mph2 km/h from S, gusts 7 mph11 km/h	52%	0%	1
Sun 6p	Clear	60°16° (likely 57°14° to 60°16°)	60°16°	0%	1 mph2 km/h from S, gusts 6 mph10 km/h	58%	0%	0
Sun 7p	Clear	56°13° (likely 53°12° to 56°13°)	56°13°	0%	1 mph2 km/h from S, gusts 4 mph7 km/h	64%	0%	0
Sun 8p	Clear	52°11° (likely 50°10° to 54°12°)	52°11°	0%	1 mph2 km/h from S, gusts 3 mph5 km/h	74%	0%	0
Sun 9p	Clear	47°8° (likely 47°8° to 52°11°)	47°8°	0%	1 mph2 km/h from S, gusts 3 mph4 km/h	86%	0%	0
Sun 10p	Clear	45°7° (likely 45°7° to 50°10°)	45°7°	0%	1 mph2 km/h from S, gusts 3 mph4 km/h	93%	0%	0
Sun 11p	Clear	43°6° (likely 43°6° to 48°9°)	43°6°	0%	1 mph2 km/h from S, gusts 3 mph5 km/h	96%	0%	0
Mon 12a	Clear	42°6° (likely 42°6° to 47°8°)	42°6°	0%	1 mph2 km/h from S, gusts 4 mph6 km/h	100%	12%	0
Mon 1a	Clear	42°6° (likely 42°6° to 46°8°)	42°6°	0%	1 mph2 km/h from S, gusts 4 mph6 km/h	96%	15%	0
Mon 2a	Clear	40°4° (likely 40°4° to 45°7°)	40°4°	0%	1 mph2 km/h from S, gusts 3 mph5 km/h	100%	15%	0
Mon 3a	Clear	40°4° (likely 40°4° to 44°7°)	40°4°	0%	1 mph2 km/h from S, gusts 2 mph4 km/h	100%	13%	0
Mon 4a	Clear	39°4° (likely 39°4° to 43°6°)	39°4°	0%	1 mph2 km/h from S, gusts 4 mph6 km/h	96%	14%	0
Mon 5a	Clear	38°3° (likely 38°3° to 43°6°)	38°3°	0%	1 mph2 km/h from S, gusts 2 mph4 km/h	100%	20%	0
Mon 6a	Clear	37°3° (likely 37°3° to 43°6°)	37°3°	0%	1 mph2 km/h from S, gusts 4 mph6 km/h	100%	20%	0
Mon 7a	Clear	37°3° (likely 37°3° to 42°6°)	37°3°	0%	1 mph2 km/h from S, gusts 5 mph8 km/h	96%	20%	0
Mon 8a	Sunny	37°3° (likely 37°3° to 42°6°)	37°3°	0%	1 mph2 km/h from S, gusts 6 mph9 km/h	100%	20%	0
Mon 9a	Sunny	43°6° (likely 41°5° to 47°8°)	43°6°	0%	1 mph2 km/h from S, gusts 5 mph9 km/h	93%	20%	1
Mon 10a	Sunny	50°10° (likely 49°9° to 54°12°)	50°10°	0%	1 mph2 km/h from S, gusts 5 mph8 km/h	77%	8%	2
Mon 11a	Sunny	56°13° (likely 56°13° to 59°15°)	56°13°	0%	2 mph3 km/h from W, gusts 5 mph9 km/h	69%	0%	3
Mon 12p	Sunny	60°16° (likely 60°16° to 63°17°)	60°16°	0%	3 mph5 km/h from W, gusts 6 mph10 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 7 mph11 km/h	52%	0%	4
Mon 2p	Sunny	67°19° (likely 67°19° to 68°20°)	67°19°	0%	5 mph8 km/h from NW, gusts 8 mph13 km/h	49%	2%	4
Mon 3p	Sunny	69°21° (likely 68°20° to 69°21°)	69°21°	0%	5 mph8 km/h from NW, gusts 9 mph15 km/h	47%	0%	4
Mon 4p	Sunny	69°21° (likely 67°19° to 69°21°)	69°21°	0%	2 mph3 km/h from NW, gusts 9 mph15 km/h	49%	0%	3
Mon 5p	Sunny	69°21° (likely 66°19° to 69°21°)	69°21°	0%	1 mph2 km/h from NW, gusts 8 mph13 km/h	51%	0%	1
Mon 6p	Clear	66°19° (likely 60°16° to 66°19°)	66°19°	0%	0 mph0 km/h, gusts 5 mph7 km/h	56%	0%	0
Mon 7p	Clear	62°17° (likely 55°13° to 62°17°)	62°17°	0%	0 mph0 km/h, gusts 3 mph5 km/h	62%	1%	0

Days ahead

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

Today, Oct 24. Mostly sunny. High 61°16°, low 33°1°. Typical 63°17° / 40°4°. Dry. Forecasts agree.
1. Evening
  6 PM–midnight
  Clear, 50°10°
  Dry
2. Overnight
  midnight–6 AM
  Clear, 36°2°
  Dry
Official NWS forecast
Tonight: Patchy frost after 4am. Mostly clear, with a low around 33. Southeast wind around 2 mph.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
61°16°–62°17°
Low, likely
32°0°–35°2°
Typical high / low
63°17° / 40°4°
Wind
6 mph9 km/h, gusts 11 mph18 km/h
UV peak
4
Tomorrow, Oct 25. Sunny. High 64°18°, low 35°2°. Typical 63°17° / 40°4°. Dry. Forecasts agree.
1. Morning
  6 AM–noon
  Sunny, 35°2°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 63°17°
  Dry
3. Evening
  6 PM–midnight
  Clear, 52°11°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 38°3°
  Dry
Official NWS forecast
Day: Areas of frost before 9am. Sunny, with a high near 64. Southeast wind around 2 mph.
Night: Mostly clear, with a low around 35. South wind around 1 mph.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
62°17°–64°18°
Low, likely
33°1°–39°4°
Typical high / low
63°17° / 40°4°
Wind
6 mph10 km/h
UV peak
4
Monday, Oct 26. Mostly sunny. High 70°21°, low 46°8°. Typical 62°17° / 40°4°. Dry. Forecasts agree.
1. Morning
  6 AM–noon
  Sunny, 37°3°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 69°21°
  Dry
3. Evening
  6 PM–midnight
  Clear, 54°12°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 46°8°
  Dry
Official NWS forecast
Day: Patchy frost before 9am. Sunny, with a high near 70. West wind 1 to 5 mph.
Night: Mostly clear, with a low around 46. Northwest wind around 2 mph.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
68°20°–70°21°
Low, likely
36°2°–46°8°
Typical high / low
62°17° / 40°4°
Wind
7 mph11 km/h
UV peak
4
Tuesday, Oct 27. Mostly sunny. High 67°19°, low 42°6°. Typical 62°17° / 39°4°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 46°8°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 64°18°
  Dry
3. Evening
  6 PM–midnight
  Clear, 52°11°
  Dry
4. Overnight
  midnight–6 AM
  Mostly clear, 42°6°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Sunny, with a high near 67.
Night: Partly cloudy, with a low around 42.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
63°17°–67°19°
Low, likely
40°4°–48°9°
Typical high / low
62°17° / 39°4°
Wind
11 mph18 km/h, gusts 20 mph32 km/h
UV peak
4
Wednesday, Oct 28. Mostly cloudy. High 65°18°, low 46°8°. Typical 62°17° / 39°4°. Dry. Forecasts agree.
1. Morning
  6 AM–noon
  Cloudy, 43°6°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 63°17°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 53°12°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 47°8°
  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 46.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
62°17°–65°18°
Low, likely
38°3°–46°8°
Typical high / low
62°17° / 39°4°
Wind
7 mph12 km/h, gusts 14 mph22 km/h
UV peak
4
Thursday, Oct 29. Partly sunny. High 71°22°, low 48°9°. Typical 61°16° / 39°4°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 47°8°
  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, 48°9°
  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
67°19°–71°22°
Low, likely
44°7°–48°9°
Typical high / low
61°16° / 39°4°
Wind
7 mph12 km/h, gusts 21 mph34 km/h
UV peak
4
Friday, Oct 30. Mostly sunny. High 75°24°, low 49°9°. Typical 61°16° / 38°3°. Dry. Forecasts agree.
1. Morning
  6 AM–noon
  Sunny, 48°9°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 74°24°
  Dry
3. Evening
  6 PM–midnight
  Clear, 60°16°
  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 75.
Night: Mostly clear, with a low around 49.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
73°23°–75°24°
Low, likely
43°6°–51°11°
Typical high / low
61°16° / 38°3°
Wind
9 mph14 km/h, gusts 15 mph24 km/h
UV peak
4
Saturday, Oct 31. Partly sunny. High 72°22°, low 48°9°. Typical 60°16° / 38°3°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Cloudy, 47°8°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 70°21°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 57°14°
  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 72.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
61°16°–72°22°
Low, likely
45°7°–53°12°
Typical high / low
60°16° / 38°3°
Wind
10 mph16 km/h, gusts 19 mph30 km/h
UV peak
3
Sunday, Nov 1. Drizzle. High 69°21°, low 52°11°. Typical 60°16° / 38°3°. Rain 0.03 in0.8 mm, 30% chance. Mostly agree.
1. Morning
  6 AM–noon
  Cloudy, 54°12°
  20% chance
2. Afternoon
  noon–6 PM
  Cloudy, 69°21°
  30% chance
3. Evening
  6 PM–midnight
  Drizzle, 65°18°
  30% chance · 0.07 in1.8 mm
4. Overnight
  midnight–6 AM
  Drizzle, 61°16°
  30% chance · 0.14 in3.5 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°–71°22°
Low, likely
49°9°–55°13°
Typical high / low
60°16° / 38°3°
Wind
13 mph21 km/h, gusts 32 mph51 km/h
UV peak
3
Monday, Nov 2. Drizzle. High 72°22°, low 59°15°. Typical 60°16° / 37°3°. Rain 0.73 in19 mm, 30% chance. Mostly agree.
1. Morning
  6 AM–noon
  Drizzle, 62°17°
  30% chance · 0.06 in1.4 mm
2. Afternoon
  noon–6 PM
  Partly sunny, 73°23°
  20% chance · 0.08 in2 mm
3. Evening
  6 PM–midnight
  Clear, 63°17°
  30% chance · 0.6 in15 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
70°21°–75°24°
Low, likely
56°13°–66°19°
Typical high / low
60°16° / 37°3°
Wind
17 mph27 km/h, gusts 36 mph57 km/h
UV peak
3

10 days15 days30 days

The outlook

Today
Dry, high 61°, low 33°.
Tomorrow
Dry, high 64°, low 35°, warming up.
Monday
Dry, high 70°, low 46°, warming up.
Rest of week
Mostly dry, highs 65–75°.

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

4.9 mi

Below flood stage

Level: 1.7 ft
Flow: 173 cfs

Forecast peak 1.7 ft Sun 2 AM

Reading from Sat 7:30 PM · NWS gauge page

Potomac River at Point of Rocks

17 mi

Below flood stage

Level: 1.6 ft
Flow: 2,560 cfs

Forecast peak 1.6 ft Sun 2 AM

Reading from Sat 7:55 PM · NWS gauge page

Monocacy River at Monocacy Blvd. in Frederick

2.4 mi

Below flood stage

Level: 1.6 ft
Flow: 116 cfs

Reading from Sat 7:15 PM · NWS gauge page

Catoctin Creek Near Middletown

11 mi

Below flood stage

Level: 1.6 ft
Flow: 9 cfs

Reading from Sat 7:45 PM · NWS gauge page

For your home

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

Heating this week

About 68% less heating than a typical week.

This week 32Typical 101

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

Comfort

Dry air outside (dew point 45°F).

Open the windows?

Sun, 1:00 PM–6:00 PM

Good stretch to open the windows.

Is this typical?

Emmitsburg 2 SE · official normals 1991–2020 · records 1956–2026

Oct 24, today vs a typical year

Today’s expected high is 2°1° colder than typical.

Last 7 days vs normal

On average 5°3° colder than normal (daily mean temperature).

−7°−4°MonOct 19
±0°TueOct 20
−5°−3°WedOct 21
−4°−2°ThuOct 22
−8°−4°FriOct 23
—SatOct 24
—SunOct 25

Walkersville 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 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

Mostly clear 10 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 northwest from Walkersville. The highest point on the skyline is about 2,500 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

Walkersville, 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

Potomac River at Point of Rocks

Monocacy River at Monocacy Blvd. in Frederick

Catoctin Creek Near Middletown

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