Frost Advisory
Starts in 2 h 6 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 7:40 PM EDT at KPHL

Woodlyn, PA weather

Mostly clear and 54°12°.

Mostly agree

Now 54°12°

Mostly clear

Wind: Calm; Light through 7 AM
Dew point: 43°6°; Comfortable · down to 34°1° by 5 AM (dry)
UV tomorrow: 4Moderate; Moderate 11 AM–4 PM · peak 4
Air quality: 59Moderate; Main pollutant: PM2.5 (fine particles)
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

About the same as this time yesterday (56°13° then, 55°13° now)

Good hours for

Below 50°10° tonight after 9 PM
Low 37°3° tomorrow at 7 AM
Above 50°10° tomorrow by 10 AM
High 67°19° tomorrow at 4 PM

TonightDown to 39°4° by 4 AM · Clear
Tomorrow morningUp to 59°15° by 11 AM · Clear
Tomorrow afternoonUp to 67°19° by 4 PM · Clear
Tomorrow nightDown to 43°6° by 4 AM · Clear
Monday morningUp to 60°16° by 11 AM · Clear
Monday afternoonUp to 70°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 7p	Clear	56°13° (likely 54°12° to 56°13°)	56°13°	0%	0 mph0 km/h, gusts 3 mph4 km/h	45%	3%	0
Sat 8p	Clear	51°11° (likely 51°11° to 54°12°)	51°11°	0%	0 mph0 km/h, gusts 2 mph4 km/h	56%	5%	0
Sat 9p	Mostly clear	49°9° (likely 49°9° to 52°11°)	49°9°	0%	0 mph0 km/h, gusts 3 mph5 km/h	61%	10%	0
Sat 10p	Clear	46°8° (likely 46°8° to 51°11°)	46°8°	0%	0 mph0 km/h, gusts 3 mph5 km/h	68%	21%	0
Sat 11p	Clear	44°7° (likely 44°7° to 49°9°)	44°7°	0%	0 mph0 km/h, gusts 4 mph6 km/h	73%	34%	0
Sun 12a	Clear	43°6° (likely 43°6° to 47°8°)	43°6°	0%	0 mph0 km/h, gusts 4 mph7 km/h	76%	16%	0
Sun 1a	Clear	42°6° (likely 42°6° to 47°8°)	42°6°	0%	0 mph0 km/h, gusts 4 mph6 km/h	79%	5%	0
Sun 2a	Clear	41°5° (likely 41°5° to 46°8°)	41°5°	0%	0 mph0 km/h, gusts 4 mph7 km/h	79%	0%	0
Sun 3a	Clear	40°4° (likely 40°4° to 45°7°)	40°4°	0%	0 mph0 km/h, gusts 4 mph7 km/h	82%	0%	0
Sun 4a	Clear	39°4° (likely 39°4° to 43°6°)	39°4°	0%	0 mph0 km/h, gusts 5 mph7 km/h	85%	0%	0
Sun 5a	Clear	39°4° (likely 38°3° to 43°6°)	39°4°	0%	0 mph0 km/h, gusts 5 mph8 km/h	82%	0%	0
Sun 6a	Clear	38°3° (likely 37°3° to 42°6°)	38°3°	0%	0 mph0 km/h, gusts 4 mph7 km/h	89%	0%	0
Sun 7a	Sunny	37°3° (likely 37°3° to 42°6°)	37°3°	0%	0 mph0 km/h, gusts 5 mph7 km/h	92%	1%	0
Sun 8a	Sunny	40°4° (likely 38°3° to 42°6°)	40°4°	0%	0 mph0 km/h, gusts 5 mph8 km/h	82%	0%	0
Sun 9a	Sunny	47°8° (likely 44°7° to 47°8°)	47°8°	0%	0 mph0 km/h, gusts 4 mph6 km/h	68%	0%	1
Sun 10a	Sunny	54°12° (likely 51°11° to 55°13°)	54°12°	0%	0 mph0 km/h, gusts 3 mph5 km/h	57%	0%	2
Sun 11a	Sunny	59°15° (likely 57°14° to 60°16°)	59°15°	0%	0 mph0 km/h, gusts 4 mph7 km/h	47%	0%	3
Sun 12p	Sunny	61°16° (likely 60°16° to 63°17°)	61°16°	0%	0 mph0 km/h, gusts 6 mph9 km/h	44%	0%	4
Sun 1p	Sunny	64°18° (likely 62°17° to 64°18°)	64°18°	0%	0 mph0 km/h, gusts 5 mph8 km/h	38%	1%	4
Sun 2p	Sunny	66°19° (likely 63°17° to 66°19°)	66°19°	0%	0 mph0 km/h, gusts 6 mph9 km/h	36%	1%	4
Sun 3p	Sunny	66°19° (likely 64°18° to 66°19°)	66°19°	0%	0 mph0 km/h, gusts 5 mph9 km/h	34%	1%	3
Sun 4p	Sunny	67°19° (likely 64°18° to 67°19°)	67°19°	0%	0 mph0 km/h, gusts 5 mph8 km/h	34%	1%	2
Sun 5p	Sunny	66°19° (likely 62°17° to 66°19°)	66°19°	0%	0 mph0 km/h, gusts 6 mph10 km/h	36%	2%	1
Sun 6p	Clear	63°17° (likely 59°15° to 63°17°)	63°17°	0%	0 mph0 km/h, gusts 7 mph11 km/h	41%	0%	0
Sun 7p	Clear	59°15° (likely 55°13° to 59°15°)	59°15°	0%	0 mph0 km/h, gusts 6 mph10 km/h	49%	0%	0
Sun 8p	Clear	53°12° (likely 52°11° to 54°12°)	53°12°	0%	0 mph0 km/h, gusts 5 mph8 km/h	64%	0%	0
Sun 9p	Clear	50°10° (likely 50°10° to 53°12°)	50°10°	0%	0 mph0 km/h, gusts 6 mph9 km/h	71%	0%	0
Sun 10p	Clear	49°9° (likely 48°9° to 51°11°)	49°9°	0%	0 mph0 km/h, gusts 6 mph9 km/h	74%	0%	0
Sun 11p	Clear	48°9° (likely 47°8° to 50°10°)	48°9°	0%	0 mph0 km/h, gusts 5 mph8 km/h	77%	0%	0
Mon 12a	Clear	45°7° (likely 45°7° to 48°9°)	45°7°	0%	0 mph0 km/h, gusts 5 mph8 km/h	86%	0%	0
Mon 1a	Clear	45°7° (likely 45°7° to 47°8°)	45°7°	0%	0 mph0 km/h, gusts 5 mph8 km/h	86%	0%	0
Mon 2a	Clear	45°7° (likely 44°7° to 46°8°)	45°7°	0%	0 mph0 km/h, gusts 6 mph10 km/h	86%	0%	0
Mon 3a	Clear	44°7° (likely 43°6° to 46°8°)	44°7°	0%	0 mph0 km/h, gusts 7 mph12 km/h	89%	0%	0
Mon 4a	Clear	43°6° (likely 42°6° to 45°7°)	43°6°	0%	0 mph0 km/h, gusts 7 mph11 km/h	89%	0%	0
Mon 5a	Clear	43°6° (likely 42°6° to 45°7°)	43°6°	0%	0 mph0 km/h, gusts 7 mph11 km/h	89%	1%	0
Mon 6a	Clear	42°6° (likely 42°6° to 46°8°)	42°6°	0%	0 mph0 km/h, gusts 8 mph12 km/h	93%	3%	0
Mon 7a	Sunny	42°6° (likely 41°5° to 45°7°)	42°6°	0%	0 mph0 km/h, gusts 7 mph12 km/h	93%	9%	0
Mon 8a	Partly sunny	44°7° (likely 41°5° to 46°8°)	44°7°	0%	0 mph0 km/h, gusts 5 mph8 km/h	89%	25%	0
Mon 9a	Sunny	50°10° (likely 47°8° to 50°10°)	50°10°	0%	0 mph0 km/h, gusts 5 mph8 km/h	74%	5%	1
Mon 10a	Sunny	55°13° (likely 54°12° to 56°13°)	55°13°	0%	0 mph0 km/h, gusts 9 mph14 km/h	64%	8%	2
Mon 11a	Sunny	60°16° (likely 60°16° to 61°16°)	60°16°	0%	5 mph8 km/h from W, gusts 11 mph18 km/h	60%	6%	3
Mon 12p	Sunny	63°17° (likely 63°17° to 65°18°)	63°17°	0%	5 mph8 km/h from W, gusts 11 mph18 km/h	52%	6%	4
Mon 1p	Sunny	66°19° (likely 66°19° to 67°19°)	66°19°	0%	5 mph8 km/h from W, gusts 12 mph19 km/h	47%	0%	4
Mon 2p	Sunny	68°20° (likely 67°19° to 68°20°)	68°20°	0%	5 mph8 km/h from W, gusts 12 mph19 km/h	44%	0%	4
Mon 3p	Sunny	70°21° (likely 68°20° to 70°21°)	70°21°	0%	5 mph8 km/h from W, gusts 13 mph21 km/h	41%	0%	3
Mon 4p	Sunny	70°21° (likely 67°19° to 70°21°)	70°21°	0%	5 mph8 km/h from W, gusts 14 mph22 km/h	41%	0%	2
Mon 5p	Sunny	69°21° (likely 66°19° to 69°21°)	69°21°	0%	5 mph8 km/h from W, gusts 14 mph22 km/h	44%	0%	1
Mon 6p	Clear	66°19° (likely 63°17° to 66°19°)	66°19°	0%	5 mph8 km/h from W, gusts 10 mph16 km/h	50%	0%	0

Days ahead

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

Today, Oct 24. Partly sunny. High 63°17°, low 37°3°. Typical 64°18° / 46°8°. Dry. Mostly agree.
1. Evening
  6 PM–midnight
  Mostly clear, 51°11°
  Dry
2. Overnight
  midnight–6 AM
  Clear, 39°4°
  Dry
Official NWS forecast
Tonight: Patchy frost after 10pm. Clear, with a low around 37. West wind around 0 mph.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
62°17°–64°18°
Low, likely
36°2°–39°4°
Typical high / low
64°18° / 46°8°
Wind
6 mph9 km/h
UV peak
4
Tomorrow, Oct 25. Mostly sunny. High 68°20°, low 42°6°. Typical 64°18° / 46°8°. Dry. Forecasts agree.
1. Morning
  6 AM–noon
  Sunny, 40°4°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 67°19°
  Dry
3. Evening
  6 PM–midnight
  Clear, 53°12°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 43°6°
  Dry
Official NWS forecast
Day: Patchy frost before 9am. Sunny, with a high near 68. Northwest wind around 0 mph.
Night: Mostly clear, with a low around 42. West wind around 0 mph.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
64°18°–68°20°
Low, likely
37°3°–42°6°
Typical high / low
64°18° / 46°8°
Wind
6 mph9 km/h
UV peak
4
Monday, Oct 26. Mostly sunny. High 70°21°, low 49°9°. Typical 63°17° / 45°7°. Dry. Forecasts agree.
1. Morning
  6 AM–noon
  Sunny, 44°7°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 70°21°
  Dry
3. Evening
  6 PM–midnight
  Clear, 58°14°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 54°12°
  Dry
Official NWS forecast
Day: Sunny, with a high near 70. West wind 0 to 5 mph.
Night: Clear, with a low around 49. Northwest wind 0 to 5 mph.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
68°20°–70°21°
Low, likely
41°5°–49°9°
Typical high / low
63°17° / 45°7°
Wind
8 mph13 km/h, gusts 18 mph28 km/h
UV peak
4
Tuesday, Oct 27. Mostly sunny. High 66°19°, low 44°7°. Typical 63°17° / 45°7°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 51°11°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 63°17°
  Dry
3. Evening
  6 PM–midnight
  Clear, 55°13°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 46°8°
  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.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
61°16°–66°19°
Low, likely
44°7°–51°11°
Typical high / low
63°17° / 45°7°
Wind
9 mph15 km/h, gusts 22 mph36 km/h
UV peak
4
Wednesday, Oct 28. Cloudy. High 65°18°, low 48°9°. Typical 63°17° / 45°7°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Cloudy, 44°7°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 62°17°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 55°13°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 49°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 48.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
61°16°–65°18°
Low, likely
41°5°–48°9°
Typical high / low
63°17° / 45°7°
Wind
7 mph10 km/h, gusts 15 mph23 km/h
UV peak
4
Thursday, Oct 29. Cloudy. High 70°21°, low 51°11°. Typical 62°17° / 44°7°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 49°9°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 68°20°
  Dry
3. Evening
  6 PM–midnight
  Clear, 58°15°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 52°11°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Mostly sunny, with a high near 70.
Night: Mostly clear, with a low around 51.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
66°19°–70°21°
Low, likely
47°8°–51°11°
Typical high / low
62°17° / 44°7°
Wind
9 mph14 km/h, gusts 29 mph47 km/h
UV peak
4
Friday, Oct 30. Mostly sunny. High 74°23°, low 52°11°. Typical 62°17° / 44°7°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 52°11°
  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 74.
Night: Mostly clear, with a low around 52.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
72°22°–75°24°
Low, likely
48°9°–54°12°
Typical high / low
62°17° / 44°7°
Wind
7 mph11 km/h, gusts 16 mph25 km/h
UV peak
4
Saturday, Oct 31. Partly sunny. High 72°22°, low 50°10°. Typical 62°17° / 44°7°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Sunny, 51°11°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 70°21°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 60°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: Mostly sunny, with a high near 72.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
62°17°–74°23°
Low, likely
46°8°–56°13°
Typical high / low
62°17° / 44°7°
Wind
7 mph12 km/h, gusts 17 mph28 km/h
UV peak
4
Sunday, Nov 1. Cloudy. High 70°21°, low 52°11°. Typical 61°16° / 43°6°. Rain 0.01 in0.3 mm, 30% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Cloudy, 54°12°
  Dry
2. Afternoon
  noon–6 PM
  Partly sunny, 70°21°
  20% chance
3. Evening
  6 PM–midnight
  Drizzle, 64°18°
  30% chance · 0.02 in0.6 mm
4. Overnight
  midnight–6 AM
  Drizzle, 62°17°
  30% chance · 0.13 in3.3 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.
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
61°16° / 43°6°
Wind
10 mph16 km/h, gusts 25 mph40 km/h
UV peak
4
Monday, Nov 2. Drizzle. High 71°22°, low 60°16°. Typical 61°16° / 43°6°. Rain 0.23 in5.8 mm, 30% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Drizzle, 64°18°
  30% chance · 0.12 in2.9 mm
2. Afternoon
  noon–6 PM
  Drizzle, 71°22°
  30% chance · 0.01 in0.3 mm
3. Evening
  6 PM–midnight
  Clear, 66°19°
  30% 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
68°20°–77°25°
Low, likely
56°13°–67°19°
Typical high / low
61°16° / 43°6°
Wind
17 mph28 km/h, gusts 36 mph58 km/h
UV peak
2

10 days15 days30 days

The outlook

Today
Dry, high 63°, low 37°.
Tomorrow
Dry, high 68°, low 42°, warming up.
Monday
Dry, high 70°, low 49°.
Rest of week
Mostly dry, highs 65–74°.

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

Schuylkill River near Philadelphia near 30th Street

10 mi

Below flood stage

Level: -1.6 ft

Forecast peak 4.7 ft Sun 1 PM

Reading from Sat 7 PM · NWS gauge page

Schuylkill River at Philadelphia

10 mi

Below flood stage

Level: 6.1 ft
Flow: 1,060 cfs

Forecast peak 6.0 ft Sat 8 PM

Reading from Sat 6 PM · NWS gauge page

Delaware River at USCG Station Washington Street (IN MLLW)

11 mi

Below flood stage

Level: 1.5 ft

Forecast peak 8.0 ft Sun 1 PM

Reading from Sat 7:06 PM · NWS gauge page

Brandywine Creek at Chadds Ford

13 mi

Below flood stage

Level: 1.9 ft
Flow: 203 cfs

Forecast peak 1.9 ft Sat 8 PM

Reading from Sat 6:30 PM · NWS gauge page

For your home

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

Heating this week

About 66% less heating than a typical week.

This week 26Typical 77

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

Comfort

Dry air outside (dew point 43°F).

Open the windows?

Sun, 12:00 PM–6:00 PM

Good stretch to open the windows.

Is this typical?

Philadelphia International Airport · official normals 1991–2020 · records 1873–2026

Oct 24, today vs a typical year

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

Last 7 days vs normal

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

−6°−3°SunOct 18
−2°−1°MonOct 19
+3°+1°TueOct 20
+2°+1°WedOct 21
+2°+1°ThuOct 22
−2°−1°FriOct 23
—SatOct 24

Woodlyn 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 27 min less
Golden hour: 5:31–6:26 PM; Morning 7:04–7:58 AM
Blue hour: 6:26–6:36 PM; Morning 6:53–7:04 AM; first light 6:53 AM

Stars tonight? Fair

Clear 12–6:54 AM, but the moon is 99% lit and up.

Moon

Waxing gibbous

98% lit · growing

Today: sets 5:33 AM · rises 5:05 PM
Full moon: Oct 26
New moon: Nov 9

Looking west from Woodlyn. The highest point on the skyline is about 4,300 ft, 49 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

Woodlyn, PA weather

Next 2 hours

Next 48 hours

Days ahead

The outlook

Today

Tomorrow

Monday

Rest of week

What changed since yesterday

Radar

Rivers

Schuylkill River near Philadelphia near 30th Street

Schuylkill River at Philadelphia

Delaware River at USCG Station Washington Street (IN MLLW)

Brandywine Creek at Chadds Ford

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