Frost Advisory
Ends in 4 h 21 min
When
From midnight tonight to 9 AM EDT Saturday.
Where
Portions of central, northern, and southern New Jersey and southeast Pennsylvania.
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: Middlesex; Western Monmouth; Mercer; Salem; Gloucester; Camden; Northwestern Burlington; Ocean; Cumberland; Atlantic; Southeastern Burlington; Delaware; Philadelphia; Eastern Chester; Eastern Montgomery; Lower Bucks
See it on weather.gov (opens in a new tab)

Observed 3:54 AM EDT at KPNE

Langhorne Manor, PA weather

Clear and 38°3°.

Mostly agree

Now 38°3°

Clear

Wind: Calm; Light through 4 PM
Dew point: 34°1°; Dry, static shocks likely
UV index: 0Low; Moderate 11 AM–4 PM · peak 4
Air quality: 64Moderate; Main pollutant: PM2.5 (fine particles)
Pressure: 30.5 inHg1033 hPa; Rising slowly · +0.02 inHg+0.7 hPa in 3 h

No precipitation expected in the next 2 hours.

From forecast models

Next 48 hours

12°7° cooler than this time yesterday (50°10° then, 38°3° now)

Good hours for

Low 35°2° today at 6 AM
Above 50°10° today by 11 AM
High 63°17° today at 4 PM
Below 50°10° tonight after 9 PM

TonightNear 37°3° · Clear
This morningUp to 53°12° by 11 AM · Partly cloudy
This afternoonUp to 63°17° by 4 PM · Clear
TonightDown to 38°3° by 5 AM · Clear
Tomorrow morningUp to 57°14° by 11 AM · Clear
Tomorrow afternoonUp to 66°19° by 4 PM · Clear
Tomorrow nightDown to 41°5° by 3 AM · 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 4a	Clear	37°3° (likely 37°3° to 40°4°)	37°3°	0%	0 mph0 km/h, gusts 5 mph8 km/h	82%	8%	0
Sat 5a	Clear	36°2° (likely 36°2° to 39°4°)	36°2°	0%	0 mph0 km/h, gusts 6 mph10 km/h	85%	11%	0
Sat 6a	Partly cloudy	35°2° (likely 35°2° to 38°3°)	35°2°	0%	0 mph0 km/h, gusts 7 mph11 km/h	89%	28%	0
Sat 7a	Partly sunny	35°2° (likely 35°2° to 38°3°)	35°2°	0%	0 mph0 km/h, gusts 6 mph10 km/h	89%	30%	0
Sat 8a	Sunny	36°2° (likely 36°2° to 39°4°)	36°2°	0%	0 mph0 km/h, gusts 6 mph10 km/h	89%	29%	0
Sat 9a	Mostly sunny	42°6° (likely 42°6° to 44°7°)	42°6°	0%	0 mph0 km/h, gusts 7 mph11 km/h	76%	28%	1
Sat 10a	Mostly sunny	48°9° (likely 47°8° to 51°11°)	48°9°	0%	0 mph0 km/h, gusts 6 mph10 km/h	63%	25%	2
Sat 11a	Mostly sunny	53°12° (likely 51°11° to 56°13°)	53°12°	0%	0 mph0 km/h, gusts 6 mph9 km/h	52%	17%	3
Sat 12p	Mostly sunny	57°14° (likely 54°12° to 60°16°)	57°14°	0%	0 mph0 km/h, gusts 5 mph7 km/h	43%	18%	4
Sat 1p	Sunny	60°16° (likely 57°14° to 61°16°)	60°16°	0%	0 mph0 km/h, gusts 3 mph5 km/h	37%	14%	4
Sat 2p	Sunny	61°16° (likely 59°15° to 62°17°)	61°16°	0%	0 mph0 km/h, gusts 3 mph5 km/h	36%	14%	4
Sat 3p	Sunny	62°17° (likely 60°16° to 63°17°)	62°17°	0%	0 mph0 km/h, gusts 2 mph4 km/h	33%	10%	3
Sat 4p	Sunny	63°17° (likely 60°16° to 63°17°)	63°17°	0%	0 mph0 km/h, gusts 2 mph3 km/h	32%	4%	2
Sat 5p	Sunny	62°17° (likely 59°15° to 62°17°)	62°17°	0%	0 mph0 km/h, gusts 2 mph3 km/h	32%	0%	1
Sat 6p	Clear	59°15° (likely 55°13° to 59°15°)	59°15°	0%	0 mph0 km/h, gusts 3 mph4 km/h	39%	0%	0
Sat 7p	Clear	55°13° (likely 51°11° to 55°13°)	55°13°	0%	0 mph0 km/h, gusts 4 mph6 km/h	49%	0%	0
Sat 8p	Clear	50°10° (likely 49°9° to 53°12°)	50°10°	0%	0 mph0 km/h, gusts 3 mph5 km/h	58%	0%	0
Sat 9p	Clear	48°9° (likely 47°8° to 51°11°)	48°9°	0%	0 mph0 km/h, gusts 4 mph6 km/h	65%	0%	0
Sat 10p	Clear	46°8° (likely 45°7° to 48°9°)	46°8°	0%	0 mph0 km/h, gusts 4 mph7 km/h	68%	0%	0
Sat 11p	Clear	44°7° (likely 44°7° to 47°8°)	44°7°	0%	0 mph0 km/h, gusts 4 mph7 km/h	73%	0%	0
Sun 12a	Clear	43°6° (likely 42°6° to 45°7°)	43°6°	0%	0 mph0 km/h, gusts 4 mph6 km/h	73%	0%	0
Sun 1a	Clear	42°6° (likely 41°5° to 44°7°)	42°6°	0%	0 mph0 km/h, gusts 4 mph6 km/h	76%	0%	0
Sun 2a	Clear	41°5° (likely 40°4° to 44°7°)	41°5°	0%	0 mph0 km/h, gusts 5 mph8 km/h	76%	0%	0
Sun 3a	Clear	39°4° (likely 39°4° to 43°6°)	39°4°	0%	0 mph0 km/h, gusts 6 mph10 km/h	82%	0%	0
Sun 4a	Clear	39°4° (likely 39°4° to 42°6°)	39°4°	0%	0 mph0 km/h, gusts 6 mph10 km/h	79%	0%	0
Sun 5a	Clear	38°3° (likely 38°3° to 40°4°)	38°3°	0%	0 mph0 km/h, gusts 5 mph8 km/h	82%	0%	0
Sun 6a	Clear	37°3° (likely 37°3° to 39°4°)	37°3°	0%	0 mph0 km/h, gusts 5 mph8 km/h	85%	0%	0
Sun 7a	Sunny	37°3° (likely 37°3° to 39°4°)	37°3°	0%	0 mph0 km/h, gusts 5 mph9 km/h	85%	0%	0
Sun 8a	Sunny	38°3° (likely 38°3° to 39°4°)	38°3°	0%	0 mph0 km/h, gusts 6 mph10 km/h	85%	0%	0
Sun 9a	Sunny	44°7° (likely 42°6° to 44°7°)	44°7°	0%	0 mph0 km/h, gusts 6 mph9 km/h	73%	0%	1
Sun 10a	Sunny	52°11° (likely 50°10° to 52°11°)	52°11°	0%	0 mph0 km/h, gusts 6 mph10 km/h	59%	0%	2
Sun 11a	Sunny	57°14° (likely 55°13° to 58°14°)	57°14°	0%	0 mph0 km/h, gusts 6 mph10 km/h	49%	0%	3
Sun 12p	Sunny	60°16° (likely 58°14° to 63°17°)	60°16°	0%	0 mph0 km/h, gusts 6 mph9 km/h	41%	0%	4
Sun 1p	Sunny	64°18° (likely 60°16° to 65°18°)	64°18°	0%	0 mph0 km/h, gusts 5 mph8 km/h	34%	0%	4
Sun 2p	Sunny	65°18° (likely 62°17° to 66°19°)	65°18°	0%	0 mph0 km/h, gusts 4 mph7 km/h	31%	0%	4
Sun 3p	Sunny	65°18° (likely 63°17° to 66°19°)	65°18°	0%	0 mph0 km/h, gusts 5 mph7 km/h	31%	1%	3
Sun 4p	Sunny	66°19° (likely 63°17° to 66°19°)	66°19°	0%	0 mph0 km/h, gusts 6 mph9 km/h	32%	0%	2
Sun 5p	Sunny	65°18° (likely 62°17° to 65°18°)	65°18°	0%	0 mph0 km/h, gusts 5 mph9 km/h	34%	0%	1
Sun 6p	Clear	62°17° (likely 57°14° to 62°17°)	62°17°	0%	0 mph0 km/h, gusts 4 mph7 km/h	39%	0%	0
Sun 7p	Clear	57°14° (likely 53°12° to 57°14°)	57°14°	0%	0 mph0 km/h, gusts 6 mph9 km/h	49%	0%	0
Sun 8p	Clear	51°11° (likely 50°10° to 53°12°)	51°11°	0%	0 mph0 km/h, gusts 5 mph9 km/h	63%	0%	0
Sun 9p	Clear	49°9° (likely 46°8° to 51°11°)	49°9°	0%	0 mph0 km/h, gusts 6 mph9 km/h	71%	0%	0
Sun 10p	Clear	47°8° (likely 43°6° to 49°9°)	47°8°	0%	0 mph0 km/h, gusts 5 mph8 km/h	74%	0%	0
Sun 11p	Clear	45°7° (likely 41°5° to 48°9°)	45°7°	0%	0 mph0 km/h, gusts 5 mph9 km/h	76%	0%	0
Mon 12a	Clear	44°7° (likely 40°4° to 47°8°)	44°7°	0%	0 mph0 km/h, gusts 6 mph9 km/h	79%	0%	0
Mon 1a	Clear	43°6° (likely 39°4° to 47°8°)	43°6°	0%	0 mph0 km/h, gusts 6 mph10 km/h	79%	1%	0
Mon 2a	Clear	42°6° (likely 38°3° to 48°9°)	42°6°	0%	0 mph0 km/h, gusts 7 mph11 km/h	82%	1%	0
Mon 3a	Clear	41°5° (likely 34°1° to 51°11°)	41°5°	0%	0 mph0 km/h, gusts 5 mph9 km/h	85%	1%	0

Days ahead

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

Today, Oct 24. Sunny. High 64°18°, low 35°2°. Typical 62°17° / 43°6°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Mostly sunny, 36°2°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 63°17°
  Dry
3. Evening
  6 PM–midnight
  Clear, 50°10°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 38°3°
  Dry
Official NWS forecast
Today: Patchy frost before 10am. Sunny, with a high near 64. North wind around 0 mph.
Tonight: Patchy frost. Partly cloudy, with a low around 35. North wind around 0 mph.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
60°16°–64°18°
Low, likely
35°2°–38°3°
Typical high / low
62°17° / 43°6°
Wind
5 mph9 km/h, gusts 10 mph17 km/h
UV peak
4
Tomorrow, Oct 25. Sunny. High 67°19°, low 39°4°. Typical 62°17° / 42°6°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 38°3°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 66°19°
  Dry
3. Evening
  6 PM–midnight
  Clear, 51°11°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 41°5°
  Dry
Official NWS forecast
Day: Patchy frost before 9am. Sunny, with a high near 67. Northwest wind around 0 mph.
Night: Clear, with a low around 39. West wind around 0 mph.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
63°17°–67°19°
Low, likely
37°3°–39°4°
Typical high / low
62°17° / 42°6°
Wind
6 mph9 km/h
UV peak
4
Monday, Oct 26. Sunny. High 69°21°, low 47°8°. Typical 62°17° / 42°6°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 42°5°
  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, 51°11°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Sunny, with a high near 69.
Night: Mostly clear, with a low around 47.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
67°19°–69°21°
Low, likely
36°2°–47°8°
Typical high / low
62°17° / 42°6°
Wind
8 mph13 km/h, gusts 17 mph27 km/h
UV peak
4
Tuesday, Oct 27. Sunny. High 63°17°, low 40°4°. Typical 61°16° / 42°6°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 49°10°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 62°17°
  Dry
3. Evening
  6 PM–midnight
  Clear, 51°11°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 41°5°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Sunny, with a high near 63.
Night: Mostly clear, with a low around 40.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
61°16°–64°18°
Low, likely
40°4°–49°9°
Typical high / low
61°16° / 42°6°
Wind
9 mph14 km/h, gusts 25 mph41 km/h
UV peak
4
Wednesday, Oct 28. Partly sunny. High 63°17°, low 44°7°. Typical 61°16° / 41°5°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 40°5°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 61°16°
  Dry
3. Evening
  6 PM–midnight
  Partly cloudy, 53°11°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 45°7°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Mostly sunny, with a high near 63.
Night: Mostly cloudy, with a low around 44.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
59°15°–63°17°
Low, likely
37°3°–44°7°
Typical high / low
61°16° / 41°5°
Wind
8 mph13 km/h, gusts 16 mph26 km/h
UV peak
4
Thursday, Oct 29. Partly sunny. High 68°20°, low 49°9°. Typical 61°16° / 41°5°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 44°7°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 66°19°
  Dry
3. Evening
  6 PM–midnight
  Clear, 56°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 68.
Night: Mostly clear, with a low around 49.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
63°17°–68°20°
Low, likely
42°6°–49°9°
Typical high / low
61°16° / 41°5°
Wind
9 mph14 km/h, gusts 29 mph47 km/h
UV peak
4
Friday, Oct 30. Mostly sunny. High 70°21°, low 47°8°. Typical 60°16° / 41°5°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Sunny, 47°8°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 70°21°
  Dry
3. Evening
  6 PM–midnight
  Clear, 58°15°
  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 70.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
67°19°–73°23°
Low, likely
44°7°–49°9°
Typical high / low
60°16° / 41°5°
Wind
10 mph16 km/h, gusts 26 mph41 km/h
UV peak
4
Saturday, Oct 31. Cloudy. High 68°20°, low 46°8°. Typical 60°16° / 40°4°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Sunny, 46°8°
  Dry
2. Afternoon
  noon–6 PM
  Mostly sunny, 67°20°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 57°14°
  Dry
4. Overnight
  midnight–6 AM
  Partly cloudy, 48°9°
  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
63°17°–73°23°
Low, likely
42°6°–51°11°
Typical high / low
60°16° / 40°4°
Wind
10 mph15 km/h, gusts 26 mph42 km/h
UV peak
4
Sunday, Nov 1. Cloudy. High 67°19°, low 48°9°. Typical 60°16° / 40°4°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Cloudy, 47°8°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 65°19°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 58°15°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 56°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
60°16°–72°22°
Low, likely
44°7°–52°11°
Typical high / low
60°16° / 40°4°
Wind
6 mph10 km/h, gusts 15 mph24 km/h
UV peak
2
Monday, Nov 2. Cloudy. High 69°21°, low 57°14°. Typical 59°15° / 40°4°. Rain 0.14 in3.6 mm, 30% chance. Mostly agree.
1. Morning
  6 AM–noon
  Cloudy, 59°15°
  Dry
2. Afternoon
  noon–6 PM
  Partly sunny, 71°22°
  20% chance · 0.07 in1.8 mm
3. Evening
  6 PM–midnight
  Partly cloudy, 62°17°
  30% chance · 0.05 in1.3 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
56°13°–58°14°
Typical high / low
59°15° / 40°4°
Wind
17 mph27 km/h, gusts 40 mph64 km/h
UV peak
3

10 days15 days30 days

The outlook

Today
Dry, high 64°, low 35°.
Tomorrow
Dry, high 67°, low 39°, warming up.
Monday
Dry, high 69°, low 47°.
Rest of week
Mostly dry, highs 63–70°.

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

Neshaminy Creek near Langhorne

2.1 mi

Below flood stage

Level: 1.1 ft
Flow: 125 cfs

Forecast peak 1.1 ft Sat 8 AM

Reading from Sat 2:45 AM · NWS gauge page

Delaware River at Burlington (IN MLLW)

6.4 mi

Below flood stage

Level: 7.6 ft

Forecast peak 9.2 ft Mon 3 PM

Reading from Sat 3:06 AM · NWS gauge page

Delaware River at Trenton

8.3 mi

Below flood stage

Level: 8.7 ft
Flow: 4,620 cfs

Forecast peak 8.6 ft Sat 8 AM

Reading from Sat 2:15 AM · NWS gauge page

Delaware River at Washington Crossing

9.2 mi

Below flood stage

Level: -1.4 ft

Forecast peak -1.3 ft Sat 8 AM

Reading from Sat 2 AM · 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 31Typical 95

Heating degree days, base 65°F

Heat-pump hours, next 7 days

h below 47°F: 23
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 11 hours are near freezing and damp, when outdoor units defrost more often.

Comfort

Dry air outside (dew point 34°F).

Open the windows?

Today, 1:00 PM–5:00 PM

Good stretch to open the windows.

Is this typical?

Trenton-Mercer Airport · official normals 1991–2020 · records 1865–2026

Oct 24, today vs a typical year

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

Last 7 days vs normal

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

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

Langhorne Manor weather by month: normals, records, snow and freeze dates

Sun & moon

Sun

Daylight: 10 h 47 min; Losing 2 min 30 s a day; shortest Dec 21, 1 h 28 min less
Golden hour: 5:29–6:24 PM; Morning 7:03–7:57 AM
Blue hour: 6:24–6:34 PM; Morning 6:52–7:03 AM; first light 6:52 AM

Stars tonight? Fair

Mostly clear 4:39–6 AM, but the moon is 96% lit and up.

Moon

Waxing gibbous

96% lit · growing

Today: sets 5:31 AM · rises 5:03 PM
Full moon: Oct 26
New moon: Nov 9

Looking northwest from Langhorne Manor.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

Langhorne Manor, PA weather

Next 2 hours

Next 48 hours

Days ahead

The outlook

Today

Tomorrow

Monday

Rest of week

What changed since yesterday

Radar

Rivers

Neshaminy Creek near Langhorne

Delaware River at Burlington (IN MLLW)

Delaware River at Trenton

Delaware River at Washington Crossing

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