Frost Advisory
Ends in 8 h 11 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 12:30 AM EDT at KPTW

Frazer, PA weather

Clear and 36°2°.

Mostly agree

Now 36°2°

Clear

Wind: Calm; Up to 5 mph8 km/h through 12 PM
Dew point: 32°0°; Dry · up to 40°4° by 11 AM (comfortable)
UV index: 0Low; Moderate 11 AM–4 PM · peak 4
Air quality: 55Moderate; Main pollutant: PM2.5 (fine particles)
Pressure: 30.58 inHg1036 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 34°1° today at 7 AM
Above 50°10° today by 10 AM
High 65°18° today at 3 PM
Below 50°10° tonight after 9 PM

TonightDown to 35°2° by 5 AM · Clear
This morningUp to 56°13° by 11 AM · Clear
This afternoonUp to 65°18° by 3 PM · Clear
TonightDown to 39°4° by 4 AM · Clear
Tomorrow morningUp to 59°15° by 11 AM · Clear
Tomorrow afternoonUp to 68°20° by 3 PM · Clear
Tomorrow nightDown to 52°11° 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	39°4° (likely 39°4° to 45°7°)	39°4°	0%	0 mph0 km/h, gusts 5 mph8 km/h	85%	0%	0
Sun 1a	Clear	38°3° (likely 38°3° to 44°7°)	38°3°	0%	0 mph0 km/h, gusts 4 mph6 km/h	89%	0%	0
Sun 2a	Clear	37°3° (likely 37°3° to 43°6°)	37°3°	0%	0 mph0 km/h, gusts 3 mph6 km/h	89%	0%	0
Sun 3a	Clear	36°2° (likely 36°2° to 42°6°)	36°2°	0%	0 mph0 km/h, gusts 5 mph7 km/h	92%	0%	0
Sun 4a	Clear	36°2° (likely 36°2° to 40°4°)	36°2°	0%	0 mph0 km/h, gusts 5 mph8 km/h	92%	0%	0
Sun 5a	Clear	35°2° (likely 35°2° to 40°4°)	35°2°	0%	0 mph0 km/h, gusts 4 mph6 km/h	96%	0%	0
Sun 6a	Clear	35°2° (likely 35°2° to 39°4°)	35°2°	0%	0 mph0 km/h, gusts 4 mph7 km/h	96%	0%	0
Sun 7a	Sunny	34°1° (likely 34°1° to 39°4°)	34°1°	0%	0 mph0 km/h, gusts 3 mph6 km/h	100%	0%	0
Sun 8a	Sunny	36°2° (likely 35°2° to 40°4°)	36°2°	0%	0 mph0 km/h, gusts 4 mph6 km/h	92%	0%	0
Sun 9a	Sunny	43°6° (likely 40°4° to 46°8°)	43°6°	0%	0 mph0 km/h, gusts 4 mph6 km/h	76%	0%	1
Sun 10a	Sunny	51°11° (likely 50°10° to 53°12°)	51°11°	0%	0 mph0 km/h, gusts 3 mph5 km/h	63%	0%	2
Sun 11a	Sunny	56°13° (likely 55°13° to 58°14°)	56°13°	0%	0 mph0 km/h, gusts 5 mph8 km/h	55%	0%	3
Sun 12p	Sunny	59°15° (likely 58°14° to 61°16°)	59°15°	0%	5 mph8 km/h from NW, gusts 6 mph10 km/h	47%	0%	4
Sun 1p	Sunny	62°17° (likely 60°16° to 63°17°)	62°17°	0%	5 mph8 km/h from NW, gusts 6 mph10 km/h	43%	1%	4
Sun 2p	Sunny	64°18° (likely 62°17° to 64°18°)	64°18°	0%	5 mph8 km/h from W, gusts 6 mph9 km/h	40%	1%	4
Sun 3p	Sunny	65°18° (likely 62°17° to 65°18°)	65°18°	0%	5 mph8 km/h from W, gusts 6 mph9 km/h	38%	1%	3
Sun 4p	Sunny	65°18° (likely 62°17° to 65°18°)	65°18°	0%	0 mph0 km/h, gusts 7 mph10 km/h	40%	0%	2
Sun 5p	Sunny	64°18° (likely 61°16° to 64°18°)	64°18°	0%	0 mph0 km/h, gusts 6 mph10 km/h	43%	0%	1
Sun 6p	Clear	60°16° (likely 56°13° to 60°16°)	60°16°	0%	0 mph0 km/h, gusts 5 mph8 km/h	49%	0%	0
Sun 7p	Clear	55°13° (likely 52°11° to 55°13°)	55°13°	0%	0 mph0 km/h, gusts 5 mph9 km/h	61%	0%	0
Sun 8p	Clear	50°10° (likely 50°10° to 52°11°)	50°10°	0%	0 mph0 km/h, gusts 6 mph10 km/h	71%	0%	0
Sun 9p	Clear	46°8° (likely 46°8° to 51°11°)	46°8°	0%	0 mph0 km/h, gusts 7 mph11 km/h	83%	0%	0
Sun 10p	Clear	44°7° (likely 44°7° to 49°9°)	44°7°	0%	0 mph0 km/h, gusts 7 mph11 km/h	93%	0%	0
Sun 11p	Clear	43°6° (likely 43°6° to 48°9°)	43°6°	0%	0 mph0 km/h, gusts 7 mph12 km/h	93%	0%	0
Mon 12a	Clear	41°5° (likely 41°5° to 47°8°)	41°5°	0%	0 mph0 km/h, gusts 7 mph12 km/h	100%	0%	0
Mon 1a	Clear	41°5° (likely 41°5° to 47°8°)	41°5°	0%	0 mph0 km/h, gusts 7 mph12 km/h	100%	0%	0
Mon 2a	Clear	40°4° (likely 40°4° to 46°8°)	40°4°	0%	0 mph0 km/h, gusts 7 mph12 km/h	100%	0%	0
Mon 3a	Clear	40°4° (likely 40°4° to 46°8°)	40°4°	0%	0 mph0 km/h, gusts 7 mph11 km/h	100%	0%	0
Mon 4a	Clear	39°4° (likely 39°4° to 45°7°)	39°4°	0%	0 mph0 km/h, gusts 7 mph11 km/h	100%	0%	0
Mon 5a	Clear	39°4° (likely 39°4° to 45°7°)	37°3°	0%	5 mph8 km/h from W, gusts 7 mph11 km/h	100%	0%	0
Mon 6a	Clear	39°4° (likely 39°4° to 44°7°)	39°4°	0%	0 mph0 km/h, gusts 7 mph11 km/h	100%	0%	0
Mon 7a	Sunny	39°4° (likely 38°3° to 44°7°)	39°4°	0%	0 mph0 km/h, gusts 7 mph12 km/h	100%	9%	0
Mon 8a	Sunny	40°4° (likely 38°3° to 45°7°)	38°3°	0%	5 mph8 km/h from W, gusts 7 mph11 km/h	100%	4%	0
Mon 9a	Sunny	47°8° (likely 44°7° to 50°10°)	46°8°	0%	5 mph8 km/h from W, gusts 7 mph11 km/h	83%	3%	1
Mon 10a	Sunny	53°12° (likely 53°12° to 55°13°)	53°12°	0%	5 mph8 km/h from W, gusts 11 mph17 km/h	69%	7%	2
Mon 11a	Sunny	59°15° (likely 58°14° to 60°16°)	59°15°	0%	5 mph8 km/h from W, gusts 13 mph21 km/h	62%	0%	3
Mon 12p	Sunny	63°17° (likely 62°17° to 64°18°)	63°17°	0%	5 mph8 km/h from W, gusts 13 mph22 km/h	54%	10%	4
Mon 1p	Sunny	65°18° (likely 65°18° to 66°19°)	65°18°	0%	5 mph8 km/h from NW, gusts 12 mph20 km/h	50%	0%	4
Mon 2p	Sunny	67°19° (likely 66°19° to 68°20°)	67°19°	0%	5 mph8 km/h from NW, gusts 13 mph21 km/h	47%	0%	4
Mon 3p	Sunny	68°20° (likely 67°19° to 68°20°)	68°20°	0%	5 mph8 km/h from NW, gusts 13 mph21 km/h	45%	0%	3
Mon 4p	Sunny	68°20° (likely 67°19° to 68°20°)	68°20°	0%	5 mph8 km/h from W, gusts 13 mph21 km/h	47%	0%	2
Mon 5p	Sunny	67°19° (likely 66°19° to 67°19°)	67°19°	0%	5 mph8 km/h from W, gusts 13 mph22 km/h	50%	0%	1
Mon 6p	Clear	63°17° (likely 60°16° to 63°17°)	63°17°	0%	5 mph8 km/h from W, gusts 10 mph16 km/h	58%	0%	0
Mon 7p	Clear	59°15° (likely 55°13° to 59°15°)	59°15°	0%	5 mph8 km/h from W, gusts 9 mph14 km/h	67%	0%	0
Mon 8p	Clear	55°13° (likely 53°12° to 57°14°)	55°13°	0%	5 mph8 km/h from W, gusts 9 mph15 km/h	77%	2%	0
Mon 9p	Clear	53°12° (likely 51°11° to 56°13°)	53°12°	0%	5 mph8 km/h from W, gusts 8 mph13 km/h	80%	0%	0
Mon 10p	Clear	52°11° (likely 50°10° to 56°13°)	52°11°	0%	0 mph0 km/h, gusts 8 mph14 km/h	83%	0%	0
Mon 11p	Clear	52°11° (likely 49°9° to 55°13°)	52°11°	0%	0 mph0 km/h, gusts 8 mph13 km/h	86%	0%	0

Days ahead

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

Today, Oct 25. Sunny. High 66°19°, low 34°1°. Typical 64°18° / 41°5°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 36°2°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 65°18°
  Dry
3. Evening
  6 PM–midnight
  Clear, 50°10°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 39°4°
  Dry
Official NWS forecast
Today: Widespread frost before 9am. Sunny, with a high near 66. Northwest wind 0 to 5 mph.
Tonight: Widespread frost. Clear, with a low around 34. West wind around 0 mph.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
62°17°–66°19°
Low, likely
34°1°–38°3°
Typical high / low
64°18° / 41°5°
Wind
6 mph10 km/h
UV peak
4
Tomorrow, Oct 26. Sunny. High 68°20°, low 45°7°. Typical 64°18° / 40°4°. Dry. Forecasts agree.
1. Morning
  6 AM–noon
  Sunny, 40°4°
  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, 50°10°
  Dry
Official NWS forecast
Day: Sunny, with a high near 68. West wind 0 to 5 mph.
Night: Clear, with a low around 45. Northwest wind 0 to 5 mph.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
67°19°–68°20°
Low, likely
38°3°–45°7°
Typical high / low
64°18° / 40°4°
Wind
8 mph13 km/h, gusts 17 mph28 km/h
UV peak
4
Tuesday, Oct 27. Mostly sunny. High 64°18°, low 39°4°. Typical 63°17° / 40°4°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 49°9°
  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, 42°5°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Sunny, with a high near 64.
Night: Mostly clear, with a low around 39.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
61°16°–65°18°
Low, likely
39°4°–49°9°
Typical high / low
63°17° / 40°4°
Wind
10 mph15 km/h, gusts 22 mph35 km/h
UV peak
4
Wednesday, Oct 28. Cloudy. High 63°17°, low 45°7°. Typical 63°17° / 40°4°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 42°5°
  Dry
2. Afternoon
  noon–6 PM
  Partly sunny, 62°16°
  Dry
3. Evening
  6 PM–midnight
  Partly cloudy, 54°12°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 47°8°
  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 45.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
60°16°–64°18°
Low, likely
39°4°–45°7°
Typical high / low
63°17° / 40°4°
Wind
6 mph10 km/h, gusts 15 mph23 km/h
UV peak
4
Thursday, Oct 29. Mostly sunny. High 69°21°, low 49°9°. Typical 62°17° / 39°4°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 47°8°
  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, 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 49.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
65°18°–69°21°
Low, likely
45°7°–49°9°
Typical high / low
62°17° / 39°4°
Wind
9 mph14 km/h, gusts 31 mph50 km/h
UV peak
4
Friday, Oct 30. Mostly sunny. High 72°22°, low 49°9°. Typical 62°17° / 39°4°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 50°10°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 73°23°
  Dry
3. Evening
  6 PM–midnight
  Clear, 61°16°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 51°10°
  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 49.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
71°22°–75°24°
Low, likely
46°8°–53°12°
Typical high / low
62°17° / 39°4°
Wind
8 mph13 km/h, gusts 18 mph28 km/h
UV peak
4
Saturday, Oct 31. Cloudy. High 70°21°, low 48°9°. Typical 62°17° / 39°4°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Mostly sunny, 48°9°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 66°19°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 56°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 70.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
63°17°–71°22°
Low, likely
45°7°–52°11°
Typical high / low
62°17° / 39°4°
Wind
9 mph14 km/h, gusts 18 mph28 km/h
UV peak
3
Sunday, Nov 1. Cloudy. High 68°20°, low 52°11°. Typical 61°16° / 38°3°. Rain 0.02 in0.5 mm, 30% chance. Mostly agree.
1. Morning
  6 AM–noon
  Cloudy, 49°10°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 68°20°
  20% chance
3. Evening
  6 PM–midnight
  Drizzle, 63°17°
  30% chance · 0.03 in0.7 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.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
65°18°–72°22°
Low, likely
47°8°–54°12°
Typical high / low
61°16° / 38°3°
Wind
9 mph14 km/h, gusts 27 mph43 km/h
UV peak
3
Monday, Nov 2. Drizzle. High 70°21°, low 60°16°. Typical 61°16° / 38°3°. Rain 0.25 in6.4 mm, 30% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Drizzle, 62°17°
  30% chance · 0.1 in2.5 mm
2. Afternoon
  noon–6 PM
  Drizzle, 70°21°
  20% chance
3. Evening
  6 PM–midnight
  Cloudy, 65°18°
  20% chance · 0.01 in0.3 mm
4. Overnight
  midnight–6 AM
  Clear, 57°14°
  20% chance · 0.1 in2.6 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°–76°24°
Low, likely
57°14°–65°18°
Typical high / low
61°16° / 38°3°
Wind
15 mph24 km/h, gusts 38 mph61 km/h
UV peak
2
Tuesday, Nov 3. Partly sunny. High 68°20°, low 54°12°. Typical 61°16° / 38°3°. Rain 0.15 in3.8 mm, 20% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Sunny, 57°14°
  20% chance · 0.12 in3 mm
2. Afternoon
  noon–6 PM
  Mostly sunny, 69°21°
  Dry
3. Evening
  6 PM–midnight
  Partly cloudy, 60°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
64°18°–74°23°
Low, likely
50°10°–57°14°
Typical high / low
61°16° / 38°3°
Wind
18 mph29 km/h, gusts 39 mph63 km/h
UV peak
3

10 days15 days30 days

The outlook

Today
Dry, high 66°, low 34°.
Tomorrow
Dry, high 68°, low 45°.
Tuesday
Dry, high 64°, low 39°, 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

Brandywine Creek at Chadds Ford

12 mi

Below flood stage

Level: 1.9 ft
Flow: 207 cfs

Forecast peak 1.9 ft Sun 2 AM

Reading from Sat 11:30 PM · NWS gauge page

Schuylkill River at Norristown

12 mi

Below flood stage

Level: 8.1 ft
Flow: 1,300 cfs

Forecast peak 8.1 ft Sun 2 AM

Reading from Sat 11:30 PM · NWS gauge page

Perkiomen Creek at Graterford

14 mi

Below flood stage

Level: 1.1 ft
Flow: 94 cfs

Forecast peak 1.1 ft Sun 2 AM

Reading from Sat 11:15 PM · NWS gauge page

Schuylkill River at Pottstown

15 mi

Below flood stage

Level: 2.1 ft
Flow: 893 cfs

Forecast peak 2.0 ft Sun 2 AM

Reading from Sat 11:15 PM · NWS gauge page

For your home

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

Heating this week

About 69% less heating than a typical week.

This week 29Typical 96

Heating degree days, base 65°F

Heat-pump hours, next 7 days

h below 47°F: 22
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 17 hours are near freezing and damp, when outdoor units defrost more often.

Comfort

Dry air outside (dew point 32°F).

Open the windows?

Today, 1:00 PM–6:00 PM

Good stretch to open the windows.

Is this typical?

PHOENIXVILLE 1 E · official normals 1991–2020 · records 1893–2026

Oct 25, today vs a typical year

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

Last 7 days vs normal

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

−2°−1°MonOct 19
+1°±0°TueOct 20
−1°WedOct 21
+1°±0°ThuOct 22
—FriOct 23
—SatOct 24
—SunOct 25

Frazer 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: 5:30–6:25 PM; Morning 7:06–8:01 AM
Blue hour: 6:25–6:36 PM; Morning 6:55–7:06 AM; first light 6:55 AM

Stars tonight? Fair

Clear 12:49–6:55 AM, but the moon is 99% lit and up.

Moon

Waxing gibbous

99% lit · growing

Today: sets 6:45 AM · rises 5:33 PM
Full moon: Oct 26
New moon: Nov 9

Looking west from Frazer. A level horizon.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

Frazer, PA weather

Next 2 hours

Next 48 hours

Days ahead

The outlook

Today

Tomorrow

Tuesday

Rest of week

What changed since yesterday

Radar

Rivers

Brandywine Creek at Chadds Ford

Schuylkill River at Norristown

Perkiomen Creek at Graterford

Schuylkill River at Pottstown

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