Frost Advisory
Starts in 52 min
When
From 10 PM this evening to 9 AM EDT Sunday.
Where
In Delaware, Kent and New Castle Counties. In Maryland, Caroline, Kent MD, and Queen Annes Counties. In Pennsylvania, Delaware, Eastern Chester, Eastern Montgomery, Lower Bucks, and Philadelphia Counties.
Issued for this forecast zone · National Weather Service Mount Holly NJ
What, impacts and precautionsHide details
What
Temperatures as low as 33 degrees 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: New Castle; Kent; Kent; Queen Anne's; Caroline; Delaware; Philadelphia; Eastern Chester; Eastern Montgomery; Lower Bucks
See it on weather.gov (opens in a new tab)

Observed 7:54 PM EDT at KNAK

Rock Hall, MD weather

Mostly cloudy and 55°13°.

Forecasts agree

Now 55°13°

Mostly cloudy

Wind: Calm; Up to 5 mph8 km/h through 9 AM
Dew point: 49°9°; Comfortable · down to 40°4° by 5 AM
UV tomorrow: 4Moderate; Moderate 11 AM–5 PM · peak 4
Air quality: 26Good; Ozone · tomorrow moderate
Pressure: 30.55 inHg1035 hPa; Rising slowly · +0.02 inHg+0.6 hPa in 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° tomorrow by 10 AM
High 63°17° tomorrow at 2 PM
Below 50°10° tomorrow night after 8 PM

TonightDown to 40°4° by 5 AM · Clear
Tomorrow morningUp to 57°14° by 11 AM · Clear
Tomorrow afternoonUp to 63°17° by 2 PM · Clear
Tomorrow nightDown to 43°6° by 1 AM · Clear
Monday morningUp to 58°14° by 11 AM · Clear
Monday afternoonUp to 68°20° by 3 PM · Clear
Monday nightDown to 55°13° by 8 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 9p	Clear	45°7° (likely 45°7° to 53°12°)	44°7°	0%	5 mph8 km/h from E, gusts 6 mph10 km/h	93%	0%	0
Sat 10p	Clear	44°7° (likely 44°7° to 51°11°)	44°7°	0%	0 mph0 km/h, gusts 7 mph11 km/h	100%	1%	0
Sat 11p	Clear	43°6° (likely 43°6° to 51°11°)	43°6°	0%	0 mph0 km/h, gusts 8 mph13 km/h	100%	0%	0
Sun 12a	Clear	42°6° (likely 42°6° to 51°11°)	42°6°	0%	0 mph0 km/h, gusts 7 mph12 km/h	100%	0%	0
Sun 1a	Clear	42°6° (likely 42°6° to 50°10°)	42°6°	0%	0 mph0 km/h, gusts 5 mph9 km/h	100%	0%	0
Sun 2a	Clear	41°5° (likely 41°5° to 50°10°)	41°5°	0%	0 mph0 km/h, gusts 4 mph7 km/h	100%	0%	0
Sun 3a	Clear	41°5° (likely 41°5° to 48°9°)	41°5°	0%	0 mph0 km/h, gusts 4 mph6 km/h	100%	6%	0
Sun 4a	Clear	41°5° (likely 41°5° to 48°9°)	41°5°	0%	0 mph0 km/h, gusts 4 mph7 km/h	100%	8%	0
Sun 5a	Clear	40°4° (likely 40°4° to 47°8°)	40°4°	0%	0 mph0 km/h, gusts 4 mph6 km/h	100%	4%	0
Sun 6a	Clear	40°4° (likely 40°4° to 47°8°)	38°3°	0%	5 mph8 km/h from NE, gusts 5 mph8 km/h	100%	8%	0
Sun 7a	Sunny	40°4° (likely 39°4° to 47°8°)	40°4°	0%	0 mph0 km/h, gusts 6 mph9 km/h	100%	19%	0
Sun 8a	Sunny	41°5° (likely 39°4° to 47°8°)	39°4°	0%	5 mph8 km/h from NE, gusts 5 mph8 km/h	100%	29%	0
Sun 9a	Sunny	47°8° (likely 44°7° to 49°9°)	46°8°	0%	5 mph8 km/h from NE, gusts 6 mph9 km/h	89%	16%	1
Sun 10a	Sunny	54°12° (likely 53°12° to 54°12°)	54°12°	0%	5 mph8 km/h from NE, gusts 5 mph8 km/h	71%	1%	2
Sun 11a	Sunny	57°14° (likely 57°14° to 59°15°)	57°14°	0%	5 mph8 km/h from NE, gusts 5 mph7 km/h	64%	6%	3
Sun 12p	Sunny	59°15° (likely 59°15° to 61°16°)	59°15°	0%	5 mph8 km/h from NE, gusts 5 mph7 km/h	57%	4%	4
Sun 1p	Sunny	61°16° (likely 60°16° to 62°17°)	61°16°	0%	5 mph8 km/h from N, gusts 5 mph9 km/h	53%	3%	4
Sun 2p	Sunny	63°17° (likely 60°16° to 64°18°)	63°17°	0%	5 mph8 km/h from N, gusts 5 mph8 km/h	50%	2%	4
Sun 3p	Sunny	63°17° (likely 61°16° to 64°18°)	63°17°	0%	5 mph8 km/h from NW, gusts 5 mph8 km/h	50%	1%	4
Sun 4p	Sunny	63°17° (likely 62°17° to 64°18°)	63°17°	0%	0 mph0 km/h, gusts 5 mph7 km/h	50%	0%	3
Sun 5p	Sunny	63°17° (likely 61°16° to 63°17°)	63°17°	0%	0 mph0 km/h, gusts 4 mph6 km/h	50%	0%	1
Sun 6p	Clear	59°15° (likely 58°14° to 61°16°)	59°15°	0%	0 mph0 km/h, gusts 4 mph6 km/h	57%	0%	0
Sun 7p	Clear	53°12° (likely 53°12° to 58°14°)	53°12°	0%	0 mph0 km/h, gusts 4 mph7 km/h	69%	0%	0
Sun 8p	Clear	48°9° (likely 48°9° to 56°13°)	48°9°	0%	0 mph0 km/h, gusts 4 mph7 km/h	83%	0%	0
Sun 9p	Clear	46°8° (likely 46°8° to 55°13°)	46°8°	0%	0 mph0 km/h, gusts 3 mph5 km/h	89%	0%	0
Sun 10p	Clear	46°8° (likely 46°8° to 54°12°)	46°8°	0%	0 mph0 km/h, gusts 5 mph7 km/h	93%	0%	0
Sun 11p	Clear	44°7° (likely 44°7° to 53°12°)	44°7°	0%	0 mph0 km/h, gusts 8 mph12 km/h	100%	1%	0
Mon 12a	Clear	44°7° (likely 44°7° to 52°11°)	44°7°	0%	0 mph0 km/h, gusts 7 mph11 km/h	100%	2%	0
Mon 1a	Clear	43°6° (likely 43°6° to 52°11°)	43°6°	0%	0 mph0 km/h, gusts 4 mph7 km/h	100%	3%	0
Mon 2a	Clear	43°6° (likely 43°6° to 52°11°)	43°6°	0%	0 mph0 km/h, gusts 4 mph6 km/h	100%	5%	0
Mon 3a	Clear	43°6° (likely 43°6° to 52°11°)	43°6°	0%	0 mph0 km/h, gusts 4 mph7 km/h	100%	1%	0
Mon 4a	Clear	43°6° (likely 43°6° to 52°11°)	43°6°	0%	0 mph0 km/h, gusts 5 mph9 km/h	100%	4%	0
Mon 5a	Clear	43°6° (likely 43°6° to 51°11°)	43°6°	0%	0 mph0 km/h, gusts 7 mph11 km/h	100%	2%	0
Mon 6a	Clear	43°6° (likely 43°6° to 51°11°)	43°6°	0%	0 mph0 km/h, gusts 7 mph12 km/h	100%	3%	0
Mon 7a	Sunny	43°6° (likely 43°6° to 50°10°)	43°6°	0%	0 mph0 km/h, gusts 7 mph12 km/h	100%	4%	0
Mon 8a	Sunny	44°7° (likely 44°7° to 50°10°)	44°7°	0%	0 mph0 km/h, gusts 6 mph10 km/h	100%	3%	0
Mon 9a	Sunny	51°11° (likely 50°10° to 51°11°)	51°11°	0%	0 mph0 km/h, gusts 7 mph12 km/h	89%	3%	1
Mon 10a	Sunny	55°13° (likely 55°13° to 56°13°)	55°13°	0%	5 mph8 km/h from W, gusts 9 mph14 km/h	77%	7%	2
Mon 11a	Sunny	58°14° (likely 58°14° to 59°15°)	58°14°	0%	5 mph8 km/h from W, gusts 10 mph15 km/h	75%	3%	3
Mon 12p	Sunny	61°16° (likely 60°16° to 62°17°)	61°16°	0%	5 mph8 km/h from W, gusts 10 mph15 km/h	65%	0%	4
Mon 1p	Sunny	64°18° (likely 62°17° to 64°18°)	64°18°	0%	5 mph8 km/h from W, gusts 9 mph15 km/h	58%	0%	4
Mon 2p	Sunny	66°19° (likely 64°18° to 66°19°)	66°19°	0%	5 mph8 km/h from W, gusts 9 mph15 km/h	56%	0%	4
Mon 3p	Sunny	68°20° (likely 65°18° to 68°20°)	68°20°	0%	5 mph8 km/h from W, gusts 11 mph17 km/h	53%	0%	4
Mon 4p	Sunny	68°20° (likely 65°18° to 68°20°)	68°20°	0%	5 mph8 km/h from W, gusts 10 mph17 km/h	55%	2%	3
Mon 5p	Sunny	67°19° (likely 63°17° to 67°19°)	67°19°	0%	5 mph8 km/h from W, gusts 9 mph15 km/h	59%	0%	1
Mon 6p	Clear	63°17° (likely 59°15° to 63°17°)	63°17°	0%	5 mph8 km/h from W, gusts 6 mph9 km/h	67%	0%	0
Mon 7p	Clear	59°15° (likely 57°14° to 60°16°)	59°15°	0%	5 mph8 km/h from W, gusts 5 mph8 km/h	75%	0%	0
Mon 8p	Clear	55°13° (likely 55°13° to 59°15°)	55°13°	0%	0 mph0 km/h, gusts 5 mph9 km/h	86%	1%	0

Days ahead

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

Today, Oct 24. Mostly sunny. High 62°17°, low 40°4°. Typical 65°18° / 48°9°. Dry. Forecasts agree.
1. Evening
  6 PM–midnight
  Clear, 43°6°
  Dry
2. Overnight
  midnight–6 AM
  Clear, 40°4°
  Dry
Official NWS forecast
Tonight: Clear, with a low around 40. East wind 0 to 5 mph.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
61°16°–62°17°
Low, likely
38°3°–41°5°
Typical high / low
65°18° / 48°9°
Wind
9 mph14 km/h, gusts 14 mph22 km/h
UV peak
4
Tomorrow, Oct 25. Sunny. High 64°18°, low 43°6°. Typical 64°18° / 47°8°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 41°5°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 63°17°
  Dry
3. Evening
  6 PM–midnight
  Clear, 48°9°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 43°6°
  Dry
Official NWS forecast
Day: Sunny, with a high near 64. North wind 0 to 5 mph.
Night: Mostly clear, with a low around 43. West wind around 0 mph.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
62°17°–64°18°
Low, likely
39°4°–47°8°
Typical high / low
64°18° / 47°8°
Wind
7 mph11 km/h
UV peak
4
Monday, Oct 26. Sunny. High 68°20°, low 48°9°. Typical 64°18° / 47°8°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 44°7°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 68°20°
  Dry
3. Evening
  6 PM–midnight
  Clear, 55°13°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 53°12°
  Dry
Official NWS forecast
Day: Sunny, with a high near 68. West wind 0 to 5 mph.
Night: Clear, with a low around 48. Northwest wind 0 to 5 mph.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
64°18°–68°20°
Low, likely
45°7°–50°10°
Typical high / low
64°18° / 47°8°
Wind
8 mph13 km/h, gusts 15 mph23 km/h
UV peak
4
Tuesday, Oct 27. Mostly sunny. High 67°19°, low 44°7°. Typical 64°18° / 46°8°. Dry. Forecasts agree.
1. Morning
  6 AM–noon
  Sunny, 52°11°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 64°18°
  Dry
3. Evening
  6 PM–midnight
  Clear, 54°12°
  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 44.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
63°17°–67°19°
Low, likely
44°7°–53°12°
Typical high / low
64°18° / 46°8°
Wind
13 mph20 km/h, gusts 23 mph37 km/h
UV peak
4
Wednesday, Oct 28. Cloudy. High 65°18°, low 47°8°. Typical 63°17° / 46°8°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Cloudy, 46°8°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 64°18°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 56°13°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 50°10°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Mostly 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
62°17°–65°18°
Low, likely
43°6°–50°10°
Typical high / low
63°17° / 46°8°
Wind
12 mph19 km/h, gusts 19 mph31 km/h
UV peak
4
Thursday, Oct 29. Partly sunny. High 69°21°, low 52°11°. Typical 63°17° / 46°8°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Cloudy, 50°10°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 65°18°
  Dry
3. Evening
  6 PM–midnight
  Clear, 58°15°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 54°12°
  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 52.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
63°17°–69°21°
Low, likely
48°9°–53°12°
Typical high / low
63°17° / 46°8°
Wind
9 mph14 km/h, gusts 25 mph41 km/h
UV peak
4
Friday, Oct 30. Mostly sunny. High 71°22°, low 52°11°. Typical 62°17° / 46°8°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Sunny, 54°12°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 70°21°
  Dry
3. Evening
  6 PM–midnight
  Clear, 61°16°
  Dry
4. Overnight
  midnight–6 AM
  Partly cloudy, 54°12°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Sunny, with a high near 71.
Night: Mostly clear, with a low around 52.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
67°19°–71°22°
Low, likely
52°11°–55°13°
Typical high / low
62°17° / 46°8°
Wind
7 mph10 km/h, gusts 14 mph22 km/h
UV peak
4
Saturday, Oct 31. Partly sunny. High 70°21°, low 52°11°. Typical 62°17° / 45°7°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 52°11°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 69°20°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 59°15°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 53°12°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Mostly sunny, with a high near 70.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
64°18°–70°21°
Low, likely
49°9°–56°13°
Typical high / low
62°17° / 45°7°
Wind
10 mph17 km/h, gusts 19 mph30 km/h
UV peak
3
Sunday, Nov 1. Cloudy. High 68°20°, low 54°12°. Typical 62°17° / 45°7°. Rain 0.01 in0.3 mm, 30% chance. Mostly agree.
1. Morning
  6 AM–noon
  Cloudy, 53°12°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 69°20°
  20% chance
3. Evening
  6 PM–midnight
  Drizzle, 64°18°
  30% chance · 0.03 in0.8 mm
4. Overnight
  midnight–6 AM
  Showers, 62°17°
  30% chance · 0.11 in2.7 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.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
65°18°–71°22°
Low, likely
47°8°–57°14°
Typical high / low
62°17° / 45°7°
Wind
16 mph25 km/h, gusts 30 mph47 km/h
UV peak
3
Monday, Nov 2. Showers. High 69°21°, low 61°16°. Typical 61°16° / 45°7°. Rain 0.2 in5.1 mm, 30% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Showers, 63°17°
  30% chance · 0.11 in2.8 mm
2. Afternoon
  noon–6 PM
  Drizzle, 70°21°
  20% chance
3. Evening
  6 PM–midnight
  Clear, 65°18°
  20% chance
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°–73°23°
Low, likely
59°15°–67°19°
Typical high / low
61°16° / 45°7°
Wind
24 mph39 km/h, gusts 38 mph61 km/h
UV peak
2

10 days15 days30 days

The outlook

Today
Dry, high 62°, low 40°.
Tomorrow
Dry, high 64°, low 43°.
Monday
Dry, high 68°, low 48°, warming up.
Rest of week
Mostly dry, highs 65–71°.

Want the meteorologists’ reasoning? Read the NWS forecast discussion (PHI) (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

Severn River at Annapolis (IN MLLW)

17 mi

Action stage

Level: 2.2 ft

Forecast peak 2.6 ft Sun 6 PM, minor flooding

Reading from Sat 8:06 PM · NWS gauge page

Northwest Branch Patapsco River at Baltimore/Fort McHenry (IN MLLW)

20 mi

Action stage

Level: 2.6 ft

Forecast peak 2.8 ft Sun 7 PM, action stage

Reading from Sat 8:06 PM · NWS gauge page

Chesapeake Bay at Tolchester Beach (IN MLLW)

5.0 mi

Below flood stage

Level: 2.8 ft

Forecast peak 2.9 ft Sun 7 PM

Reading from Sat 8 PM · NWS gauge page

Eastern Bay at Claiborne (IN MLLW)

21 mi

Below flood stage

Level: 2.1 ft

Forecast peak 3.1 ft Sun 4 PM

Reading from Sat 7:36 PM · NWS gauge page

For your home

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

Heating this week

About 60% less heating than a typical week.

This week 28Typical 70

Heating degree days, base 65°F

Heat-pump hours, next 7 days

h below 47°F: 24
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 9 hours are near freezing and damp, when outdoor units defrost more often.

Comfort

Dry air outside (dew point 49°F).

Open the windows?

Sun, 1:00 PM–5:00 PM

Good stretch to open the windows.

Is this typical?

Stevensville 2sw · official normals 1991–2020 · records 1926–2026

Oct 24, today vs a typical year

Today’s expected high is 3°2° colder than typical.

Last 7 days vs normal

On average 1°0° colder than normal (daily mean temperature).

−7°−4°MonOct 19
−3°−2°TueOct 20
+3°+2°WedOct 21
+2°+1°ThuOct 22
+2°+1°FriOct 23
—SatOct 24
—SunOct 25

Rock Hall 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: 5:36–6:30 PM; Morning 7:07–8:01 AM
Blue hour: 6:30–6:40 PM; Morning 6:56–7:07 AM; first light 6:56 AM

Stars tonight? Fair

Clear 9:08 PM–6:57 AM, but the moon is 99% lit and up.

Moon

Waxing gibbous

98% lit · growing

Today: sets 5:36 AM · rises 5:10 PM
Full moon: Oct 26
New moon: Nov 9

Looking southwest from Rock Hall. The highest point on the skyline is about 2,400 ft, 17 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