Frost Advisory
Ends in 8 h 33 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 12:00 AM EDT at KPHL

Ardmore, PA weather

Clear and 46°8°.

Forecasts agree

Now 46°8°

Clear

Wind: Calm; Light through 12 PM
Dew point: 43°6°; Comfortable · down to 34°1° by 4 AM (dry)
UV index: 0Low; Moderate 11 AM–4 PM · peak 4
Air quality: 95Moderate; PM2.5 (fine particles) · tomorrow good
Pressure: 30.56 inHg1035 hPa; Steady over the next 3 h

No precipitation expected in the next 2 hours.

From forecast models

Next 48 hours

Good hours for

Low 35°2° today at 7 AM
Above 50°10° today by 10 AM
High 65°18° today at 3 PM

TonightDown to 36°2° by 5 AM · Clear
This morningUp to 57°14° by 11 AM · Clear
This afternoonUp to 65°18° by 3 PM · Clear
TonightDown to 41°5° by 5 AM · Clear
Tomorrow morningUp to 59°15° by 11 AM · Clear
Tomorrow afternoonUp to 69°21° by 3 PM · Clear
Tomorrow nightDown to 54°12° by 10 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
Sun 12a	Clear	41°5° (likely 41°5° to 45°7°)	41°5°	0%	0 mph0 km/h, gusts 5 mph7 km/h	79%	34%	0
Sun 1a	Clear	40°4° (likely 39°4° to 43°6°)	40°4°	0%	0 mph0 km/h, gusts 5 mph9 km/h	82%	37%	0
Sun 2a	Clear	38°3° (likely 38°3° to 42°6°)	38°3°	0%	0 mph0 km/h, gusts 6 mph10 km/h	89%	17%	0
Sun 3a	Clear	37°3° (likely 37°3° to 41°5°)	37°3°	0%	0 mph0 km/h, gusts 7 mph12 km/h	92%	0%	0
Sun 4a	Clear	37°3° (likely 37°3° to 40°4°)	37°3°	0%	0 mph0 km/h, gusts 7 mph11 km/h	89%	0%	0
Sun 5a	Clear	36°2° (likely 36°2° to 40°4°)	36°2°	0%	0 mph0 km/h, gusts 7 mph11 km/h	89%	0%	0
Sun 6a	Clear	36°2° (likely 36°2° to 39°4°)	36°2°	0%	0 mph0 km/h, gusts 7 mph12 km/h	92%	0%	0
Sun 7a	Sunny	35°2° (likely 35°2° to 38°3°)	35°2°	0%	0 mph0 km/h, gusts 7 mph11 km/h	96%	0%	0
Sun 8a	Sunny	37°3° (likely 36°2° to 39°4°)	37°3°	0%	0 mph0 km/h, gusts 7 mph11 km/h	92%	0%	0
Sun 9a	Sunny	45°7° (likely 42°6° to 46°8°)	45°7°	0%	0 mph0 km/h, gusts 6 mph9 km/h	70%	0%	1
Sun 10a	Sunny	52°11° (likely 51°11° to 52°11°)	52°11°	0%	0 mph0 km/h, gusts 5 mph7 km/h	59%	0%	2
Sun 11a	Sunny	57°14° (likely 57°14° to 58°14°)	57°14°	0%	0 mph0 km/h, gusts 6 mph9 km/h	49%	0%	3
Sun 12p	Sunny	60°16° (likely 60°16° to 61°16°)	60°16°	0%	0 mph0 km/h, gusts 6 mph10 km/h	42%	0%	4
Sun 1p	Sunny	63°17° (likely 62°17° to 64°18°)	63°17°	0%	0 mph0 km/h, gusts 7 mph11 km/h	38%	0%	4
Sun 2p	Sunny	64°18° (likely 63°17° to 65°18°)	64°18°	0%	5 mph8 km/h from W, gusts 6 mph9 km/h	35%	0%	4
Sun 3p	Sunny	65°18° (likely 64°18° to 66°19°)	65°18°	0%	0 mph0 km/h, gusts 6 mph10 km/h	34%	0%	3
Sun 4p	Sunny	65°18° (likely 64°18° to 65°18°)	65°18°	0%	0 mph0 km/h, gusts 6 mph9 km/h	34%	0%	2
Sun 5p	Sunny	65°18° (likely 63°17° to 65°18°)	65°18°	0%	0 mph0 km/h, gusts 6 mph9 km/h	35%	0%	1
Sun 6p	Clear	61°16° (likely 58°14° to 61°16°)	61°16°	0%	0 mph0 km/h, gusts 5 mph8 km/h	44%	0%	0
Sun 7p	Clear	58°14° (likely 53°12° to 58°14°)	58°14°	0%	0 mph0 km/h, gusts 5 mph8 km/h	51%	0%	0
Sun 8p	Clear	52°11° (likely 51°11° to 54°12°)	52°11°	0%	0 mph0 km/h, gusts 6 mph10 km/h	66%	0%	0
Sun 9p	Clear	50°10° (likely 49°9° to 52°11°)	50°10°	0%	0 mph0 km/h, gusts 7 mph12 km/h	71%	0%	0
Sun 10p	Clear	47°8° (likely 47°8° to 50°10°)	47°8°	0%	0 mph0 km/h, gusts 7 mph11 km/h	79%	0%	0
Sun 11p	Clear	46°8° (likely 46°8° to 49°9°)	46°8°	0%	0 mph0 km/h, gusts 7 mph12 km/h	83%	0%	0
Mon 12a	Clear	44°7° (likely 44°7° to 48°9°)	44°7°	0%	0 mph0 km/h, gusts 8 mph13 km/h	89%	0%	0
Mon 1a	Clear	44°7° (likely 44°7° to 48°9°)	44°7°	0%	0 mph0 km/h, gusts 9 mph14 km/h	89%	0%	0
Mon 2a	Clear	43°6° (likely 42°6° to 46°8°)	43°6°	0%	0 mph0 km/h, gusts 8 mph13 km/h	89%	0%	0
Mon 3a	Clear	42°6° (likely 41°5° to 46°8°)	40°4°	0%	5 mph8 km/h from W, gusts 9 mph15 km/h	93%	0%	0
Mon 4a	Clear	42°6° (likely 40°4° to 45°7°)	40°4°	0%	5 mph8 km/h from W, gusts 9 mph14 km/h	93%	0%	0
Mon 5a	Clear	41°5° (likely 39°4° to 45°7°)	39°4°	0%	5 mph8 km/h from W, gusts 9 mph14 km/h	96%	0%	0
Mon 6a	Clear	41°5° (likely 38°3° to 45°7°)	39°4°	0%	5 mph8 km/h from W, gusts 9 mph15 km/h	96%	0%	0
Mon 7a	Sunny	41°5° (likely 38°3° to 44°7°)	39°4°	0%	5 mph8 km/h from W, gusts 8 mph14 km/h	96%	8%	0
Mon 8a	Sunny	42°6° (likely 39°4° to 45°7°)	40°4°	0%	5 mph8 km/h from W, gusts 8 mph13 km/h	96%	7%	0
Mon 9a	Sunny	49°9° (likely 45°7° to 51°11°)	48°9°	0%	5 mph8 km/h from W, gusts 8 mph12 km/h	77%	5%	1
Mon 10a	Sunny	55°13° (likely 54°12° to 56°13°)	55°13°	0%	5 mph8 km/h from W, gusts 11 mph18 km/h	64%	0%	2
Mon 11a	Sunny	59°15° (likely 59°15° to 60°16°)	59°15°	0%	5 mph8 km/h from W, gusts 11 mph18 km/h	60%	0%	3
Mon 12p	Sunny	62°17° (likely 62°17° to 64°18°)	62°17°	0%	5 mph8 km/h from W, gusts 13 mph21 km/h	54%	8%	4
Mon 1p	Sunny	65°18° (likely 65°18° to 67°19°)	65°18°	0%	5 mph8 km/h from W, gusts 13 mph20 km/h	46%	2%	4
Mon 2p	Sunny	67°19° (likely 67°19° to 69°21°)	67°19°	0%	5 mph8 km/h from W, gusts 13 mph21 km/h	43%	0%	4
Mon 3p	Sunny	69°21° (likely 68°20° to 69°21°)	69°21°	0%	5 mph8 km/h from W, gusts 13 mph21 km/h	40%	0%	3
Mon 4p	Sunny	69°21° (likely 68°20° to 69°21°)	69°21°	0%	5 mph8 km/h from W, gusts 13 mph21 km/h	40%	0%	2
Mon 5p	Sunny	68°20° (likely 67°19° to 68°20°)	68°20°	0%	5 mph8 km/h from W, gusts 13 mph21 km/h	44%	0%	1
Mon 6p	Clear	65°18° (likely 62°17° to 65°18°)	65°18°	0%	5 mph8 km/h from W, gusts 10 mph16 km/h	50%	0%	0
Mon 7p	Clear	61°16° (likely 57°14° to 61°16°)	61°16°	0%	5 mph8 km/h from W, gusts 10 mph16 km/h	58%	1%	0
Mon 8p	Clear	57°14° (likely 54°12° to 58°14°)	57°14°	0%	5 mph8 km/h from W, gusts 10 mph16 km/h	69%	1%	0
Mon 9p	Clear	55°13° (likely 52°11° to 58°14°)	55°13°	0%	5 mph8 km/h from W, gusts 9 mph14 km/h	74%	2%	0
Mon 10p	Clear	54°12° (likely 51°11° to 57°14°)	54°12°	0%	5 mph8 km/h from NW, gusts 8 mph12 km/h	77%	0%	0
Mon 11p	Clear	54°12° (likely 49°9° to 57°14°)	54°12°	0%	5 mph8 km/h from NW, gusts 8 mph13 km/h	80%	0%	0

Days ahead

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

Today, Oct 25. Sunny. High 66°19°, low 35°2°. Typical 64°18° / 46°8°. Dry. Forecasts agree.
1. Morning
  6 AM–noon
  Sunny, 37°3°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 65°18°
  Dry
3. Evening
  6 PM–midnight
  Clear, 52°11°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 41°5°
  Dry
Official NWS forecast
Today: Areas of frost before 9am. Sunny, with a high near 66. Northwest wind 0 to 5 mph.
Tonight: Areas of frost. Clear, with a low around 35. Northwest wind around 0 mph.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
64°18°–66°19°
Low, likely
35°2°–38°3°
Typical high / low
64°18° / 46°8°
Wind
6 mph10 km/h
UV peak
4
Tomorrow, Oct 26. Sunny. High 69°21°, low 47°8°. Typical 63°17° / 45°7°. Dry. Forecasts agree.
1. Morning
  6 AM–noon
  Sunny, 42°6°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 69°21°
  Dry
3. Evening
  6 PM–midnight
  Clear, 57°14°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 50°10°
  Dry
Official NWS forecast
Day: Sunny, with a high near 69. West wind around 5 mph.
Night: Clear, with a low around 47. Northwest wind around 5 mph.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
68°20°–69°21°
Low, likely
37°3°–47°8°
Typical high / low
63°17° / 45°7°
Wind
8 mph12 km/h, gusts 16 mph26 km/h
UV peak
4
Tuesday, Oct 27. Mostly sunny. High 65°18°, low 42°6°. Typical 63°17° / 45°7°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 50°10°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 63°17°
  Dry
3. Evening
  6 PM–midnight
  Mostly clear, 53°11°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 43°6°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Sunny, with a high near 65.
Night: Mostly clear, with a low around 42.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
62°17°–66°19°
Low, likely
42°6°–50°10°
Typical high / low
63°17° / 45°7°
Wind
9 mph14 km/h, gusts 22 mph36 km/h
UV peak
4
Wednesday, Oct 28. Cloudy. High 63°17°, low 46°8°. Typical 63°17° / 45°7°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Cloudy, 43°6°
  Dry
2. Afternoon
  noon–6 PM
  Partly sunny, 63°17°
  Dry
3. Evening
  6 PM–midnight
  Partly cloudy, 55°13°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 48°9°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Mostly sunny, with a high near 63.
Night: Partly cloudy, with a low around 46.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
61°16°–64°18°
Low, likely
39°4°–46°8°
Typical high / low
63°17° / 45°7°
Wind
7 mph11 km/h, gusts 15 mph23 km/h
UV peak
4
Thursday, Oct 29. Cloudy. High 69°21°, low 50°10°. Typical 62°17° / 44°7°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 47°8°
  Dry
2. Afternoon
  noon–6 PM
  Mostly sunny, 67°19°
  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: 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
66°19°–69°21°
Low, likely
44°7°–50°10°
Typical high / low
62°17° / 44°7°
Wind
8 mph13 km/h, gusts 29 mph47 km/h
UV peak
4
Friday, Oct 30. Mostly sunny. High 72°22°, low 50°10°. Typical 62°17° / 44°7°. Dry. Forecasts agree.
1. Morning
  6 AM–noon
  Sunny, 51°10°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 74°23°
  Dry
3. Evening
  6 PM–midnight
  Clear, 62°17°
  Dry
4. Overnight
  midnight–6 AM
  Mostly clear, 51°11°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Sunny, with a high near 72.
Night: Mostly clear, with a low around 50.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
72°22°–75°24°
Low, likely
47°8°–52°11°
Typical high / low
62°17° / 44°7°
Wind
6 mph10 km/h, gusts 16 mph25 km/h
UV peak
4
Saturday, Oct 31. Cloudy. High 70°21°, low 48°9°. Typical 62°17° / 44°7°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Sunny, 49°9°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 67°19°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 57°14°
  Dry
4. Overnight
  midnight–6 AM
  Partly cloudy, 49°10°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Mostly sunny, with a high near 70.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
63°17°–72°22°
Low, likely
44°7°–53°12°
Typical high / low
62°17° / 44°7°
Wind
7 mph12 km/h, gusts 17 mph28 km/h
UV peak
3
Sunday, Nov 1. Cloudy. High 69°21°, low 52°11°. Typical 61°16° / 43°6°. Rain 0.02 in0.5 mm, 30% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Cloudy, 49°10°
  Dry
2. Afternoon
  noon–6 PM
  Partly sunny, 69°21°
  20% chance
3. Evening
  6 PM–midnight
  Drizzle, 63°17°
  30% chance · 0.02 in0.5 mm
4. Overnight
  midnight–6 AM
  Drizzle, 61°16°
  30% chance · 0.12 in3 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
65°18°–73°23°
Low, likely
47°8°–54°12°
Typical high / low
61°16° / 43°6°
Wind
9 mph15 km/h, gusts 25 mph40 km/h
UV peak
3
Monday, Nov 2. Drizzle. High 70°21°, low 60°16°. Typical 61°16° / 43°6°. Rain 0.24 in6.1 mm, 30% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Drizzle, 63°17°
  30% chance · 0.11 in2.9 mm
2. Afternoon
  noon–6 PM
  Drizzle, 70°21°
  20% chance
3. Evening
  6 PM–midnight
  Clear, 66°19°
  20% chance
4. Overnight
  midnight–6 AM
  Drizzle, 58°14°
  20% chance · 0.08 in2 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°–77°25°
Low, likely
57°14°–66°19°
Typical high / low
61°16° / 43°6°
Wind
17 mph27 km/h, gusts 37 mph59 km/h
UV peak
2
Tuesday, Nov 3. Partly sunny. High 69°21°, low 55°13°. Typical 60°16° / 42°6°. Rain 0.13 in3.3 mm, 20% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Drizzle, 57°14°
  20% chance · 0.08 in2 mm
2. Afternoon
  noon–6 PM
  Mostly sunny, 70°21°
  Dry
3. Evening
  6 PM–midnight
  Mostly clear, 62°16°
  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
65°18°–74°23°
Low, likely
52°11°–57°14°
Typical high / low
60°16° / 42°6°
Wind
16 mph26 km/h, gusts 39 mph62 km/h
UV peak
4

10 days15 days30 days

The outlook

Today
Dry, high 66°, low 35°.
Tomorrow
Dry, high 69°, low 47°, warming up.
Tuesday
Dry, high 65°, low 42°, cooling off.
Rest of week
Mostly dry, highs 63–72°.

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 at Philadelphia

6.1 mi

Below flood stage

Level: 6.0 ft
Flow: 1,000 cfs

Forecast peak 6.0 ft Sun 2 AM

Reading from Sat 10 PM · NWS gauge page

Schuylkill River near Philadelphia near 30th Street

6.9 mi

Below flood stage

Level: 3.1 ft

Forecast peak 4.7 ft Sun 1 PM

Reading from Sat 10:45 PM · NWS gauge page

Schuylkill River at Norristown

8.0 mi

Below flood stage

Level: 8.1 ft
Flow: 1,330 cfs

Forecast peak 8.1 ft Sun 2 AM

Reading from Sat 10:30 PM · NWS gauge page

Delaware River at USCG Station Washington Street (IN MLLW)

9.4 mi

Below flood stage

Level: 6.0 ft

Forecast peak 8.0 ft Sun 1 PM

Reading from Sat 11 PM · NWS gauge page

For your home

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

Heating this week

About 67% less heating than a typical week.

This week 26Typical 79

Heating degree days, base 65°F

Heat-pump hours, next 7 days

h below 47°F: 20
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 14 hours are near freezing and damp, when outdoor units defrost more often.

Comfort

Dry air outside (dew point 43°F).

Open the windows?

Today, 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 25, today vs a typical year

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

Last 7 days vs normal

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

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

Ardmore weather by month: normals, records, snow and freeze dates

Sun & moon

Sun

Daylight: 10 h 45 min; Losing 2 min 25 s a day; shortest Dec 21, 1 h 25 min less
Golden hour: 5:29–6:24 PM; Morning 7:05–8:00 AM
Blue hour: 6:24–6:35 PM; Morning 6:54–7:05 AM; first light 6:54 AM

Stars tonight? Fair

Mostly clear 2–6:54 AM, but the moon is 99% lit and up.

Moon

Waxing gibbous

99% lit · growing

Today: sets 6:44 AM · rises 5:32 PM
Full moon: Oct 26
New moon: Nov 9

Looking southwest from Ardmore. The highest point on the skyline is about 3,900 ft, 54 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

Ardmore, PA weather

Next 2 hours

Next 48 hours

Days ahead

The outlook

Today

Tomorrow

Tuesday

Rest of week

What changed since yesterday

Radar

Rivers

Schuylkill River at Philadelphia

Schuylkill River near Philadelphia near 30th Street

Schuylkill River at Norristown

Delaware River at USCG Station Washington Street (IN MLLW)

For your home

Heating this week

Heat-pump hours, next 7 days

Comfort

Open the windows?

Is this typical?

Oct 25, today vs a typical year

Last 7 days vs normal

Sun & moon

Sun

Stars tonight? Fair

Moon