Freeze Warning
Ends in 5 h 38 min
When
From midnight tonight to 9 AM EDT Saturday.
Where
In New Jersey, Morris, Somerset, and Hunterdon Counties. In Pennsylvania, Berks, Lehigh, Upper Bucks, Western Chester, and Western Montgomery Counties.
Issued for this forecast zone · National Weather Service Mount Holly NJ
What, impacts and precautionsHide details
What
Sub-freezing temperatures as low as 30 degrees expected.
Impacts
Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing.
Precautionary actions
Take steps now to protect tender plants from the cold.
Areas: Morris; Hunterdon; Somerset; Berks; Lehigh; Western Chester; Western Montgomery; Upper Bucks
See it on weather.gov (opens in a new tab)

Observed 2:30 AM EDT at KPTW

Harleysville, PA weather

Freeze Warning. 36°2° and clear now.

Forecasts agree

Now 36°2°

Clear

Wind: Calm; Light through 3 PM
Dew point: 34°1°; Dry, static shocks likely
Humidity: 93%; Air 36°2°, dew point 34°1° · frost likely
UV index: 0Low; Moderate 11 AM–4 PM · peak 4
Pressure: 30.51 inHg1033 hPa; Steady over the last 3 h

No precipitation expected in the next 2 hours.

From forecast models

Next 48 hours

17°9° cooler than this time yesterday (52°11° then, 35°2° now)

Good hours for

Below freezing until 8 AM (low 31°−1°)
Low 31°−1° today at 6 AM
Above 50°10° today by 10 AM
High 62°17° today at 2 PM
Below 50°10° tonight after 8 PM

TonightNear 32°0° · freezing, low 32°0° · Clear
This morningUp to 55°13° by 11 AM · freezing, low 31°−1° · Clear
This afternoonUp to 62°17° by 2 PM · Clear
TonightDown to 34°1° by 4 AM · Clear
Tomorrow morningUp to 56°13° by 11 AM · freezing, low 32°0° · Clear
Tomorrow afternoonUp to 65°18° by 3 PM · Clear
Tomorrow nightDown to 39°4° by 1 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 3a	Clear	32°0° (likely 32°0° to 40°4°)	32°0°	0%	0 mph0 km/h, gusts 6 mph9 km/h	100%	5%	0
Sat 4a	Clear	32°0° (likely 32°0° to 39°4°)	32°0°	0%	0 mph0 km/h, gusts 6 mph10 km/h	100%	10%	0
Sat 5a	Partly cloudy	32°0° (likely 32°0° to 38°3°)	32°0°	0%	0 mph0 km/h, gusts 6 mph9 km/h	100%	18%	0
Sat 6a	Mostly clear	31°−1° (likely 31°−1° to 37°3°)	31°−1°	0%	0 mph0 km/h, gusts 4 mph6 km/h	100%	30%	0
Sat 7a	Sunny	31°−1° (likely 31°−1° to 36°2°)	31°−1°	0%	0 mph0 km/h, gusts 4 mph6 km/h	100%	25%	0
Sat 8a	Sunny	33°1° (likely 33°1° to 37°3°)	33°1°	0%	0 mph0 km/h, gusts 4 mph7 km/h	96%	20%	0
Sat 9a	Sunny	40°4° (likely 39°4° to 42°6°)	40°4°	0%	0 mph0 km/h, gusts 5 mph9 km/h	79%	21%	1
Sat 10a	Mostly sunny	50°10° (likely 47°8° to 50°10°)	50°10°	0%	0 mph0 km/h, gusts 4 mph7 km/h	56%	18%	2
Sat 11a	Sunny	55°13° (likely 52°11° to 56°13°)	55°13°	0%	0 mph0 km/h, gusts 4 mph7 km/h	51%	27%	3
Sat 12p	Sunny	58°14° (likely 55°13° to 59°15°)	58°14°	0%	0 mph0 km/h, gusts 3 mph5 km/h	47%	9%	4
Sat 1p	Sunny	60°16° (likely 58°14° to 61°16°)	60°16°	0%	0 mph0 km/h, gusts 4 mph6 km/h	42%	7%	4
Sat 2p	Sunny	62°17° (likely 59°15° to 62°17°)	62°17°	0%	0 mph0 km/h, gusts 4 mph6 km/h	39%	6%	4
Sat 3p	Sunny	62°17° (likely 60°16° to 62°17°)	62°17°	0%	0 mph0 km/h, gusts 3 mph4 km/h	39%	4%	3
Sat 4p	Sunny	62°17° (likely 59°15° to 62°17°)	62°17°	0%	0 mph0 km/h, gusts 3 mph4 km/h	38%	2%	2
Sat 5p	Sunny	62°17° (likely 58°14° to 62°17°)	62°17°	0%	0 mph0 km/h, gusts 2 mph4 km/h	36%	0%	1
Sat 6p	Clear	58°14° (likely 54°12° to 58°14°)	58°14°	0%	0 mph0 km/h, gusts 2 mph4 km/h	45%	0%	0
Sat 7p	Clear	53°12° (likely 51°11° to 53°12°)	53°12°	0%	0 mph0 km/h, gusts 2 mph3 km/h	52%	0%	0
Sat 8p	Clear	49°9° (likely 48°9° to 51°11°)	49°9°	0%	0 mph0 km/h, gusts 3 mph5 km/h	61%	0%	0
Sat 9p	Clear	43°6° (likely 43°6° to 49°9°)	43°6°	0%	0 mph0 km/h, gusts 2 mph4 km/h	76%	0%	0
Sat 10p	Clear	40°4° (likely 40°4° to 48°9°)	40°4°	0%	0 mph0 km/h, gusts 2 mph3 km/h	85%	0%	0
Sat 11p	Clear	40°4° (likely 40°4° to 46°8°)	40°4°	0%	0 mph0 km/h, gusts 1 mph2 km/h	89%	0%	0
Sun 12a	Clear	39°4° (likely 39°4° to 45°7°)	39°4°	0%	0 mph0 km/h, gusts 2 mph4 km/h	92%	0%	0
Sun 1a	Clear	37°3° (likely 37°3° to 44°7°)	37°3°	0%	0 mph0 km/h, gusts 2 mph4 km/h	100%	0%	0
Sun 2a	Clear	36°2° (likely 36°2° to 43°6°)	36°2°	0%	0 mph0 km/h, gusts 2 mph3 km/h	100%	0%	0
Sun 3a	Clear	35°2° (likely 35°2° to 41°5°)	35°2°	0%	0 mph0 km/h, gusts 2 mph3 km/h	100%	0%	0
Sun 4a	Clear	34°1° (likely 34°1° to 41°5°)	34°1°	0%	0 mph0 km/h, gusts 3 mph4 km/h	100%	0%	0
Sun 5a	Clear	34°1° (likely 34°1° to 40°4°)	34°1°	0%	0 mph0 km/h, gusts 3 mph4 km/h	100%	0%	0
Sun 6a	Clear	33°1° (likely 33°1° to 40°4°)	33°1°	0%	0 mph0 km/h, gusts 3 mph4 km/h	100%	0%	0
Sun 7a	Sunny	32°0° (likely 32°0° to 40°4°)	32°0°	0%	0 mph0 km/h, gusts 4 mph6 km/h	100%	0%	0
Sun 8a	Sunny	35°2° (likely 34°1° to 38°3°)	35°2°	0%	0 mph0 km/h, gusts 4 mph6 km/h	100%	0%	0
Sun 9a	Sunny	41°5° (likely 39°4° to 43°6°)	41°5°	0%	0 mph0 km/h, gusts 3 mph6 km/h	93%	0%	1
Sun 10a	Sunny	49°9° (likely 49°9° to 51°11°)	49°9°	0%	0 mph0 km/h, gusts 4 mph6 km/h	71%	1%	2
Sun 11a	Sunny	56°13° (likely 55°13° to 58°14°)	56°13°	0%	0 mph0 km/h, gusts 7 mph11 km/h	62%	3%	3
Sun 12p	Sunny	60°16° (likely 58°14° to 62°17°)	60°16°	0%	0 mph0 km/h, gusts 7 mph11 km/h	51%	3%	4
Sun 1p	Sunny	62°17° (likely 60°16° to 64°18°)	62°17°	0%	0 mph0 km/h, gusts 7 mph11 km/h	46%	2%	4
Sun 2p	Sunny	63°17° (likely 61°16° to 65°18°)	63°17°	0%	0 mph0 km/h, gusts 7 mph11 km/h	43%	2%	4
Sun 3p	Sunny	65°18° (likely 62°17° to 66°19°)	65°18°	0%	0 mph0 km/h, gusts 7 mph11 km/h	40%	3%	3
Sun 4p	Sunny	65°18° (likely 62°17° to 65°18°)	65°18°	0%	0 mph0 km/h, gusts 7 mph12 km/h	40%	2%	2
Sun 5p	Sunny	63°17° (likely 61°16° to 64°18°)	63°17°	0%	0 mph0 km/h, gusts 6 mph10 km/h	44%	0%	1
Sun 6p	Clear	59°15° (likely 55°13° to 59°15°)	59°15°	0%	0 mph0 km/h, gusts 5 mph7 km/h	53%	0%	0
Sun 7p	Clear	53°12° (likely 52°11° to 54°12°)	53°12°	0%	0 mph0 km/h, gusts 4 mph6 km/h	69%	0%	0
Sun 8p	Clear	49°9° (likely 48°9° to 52°11°)	49°9°	0%	0 mph0 km/h, gusts 4 mph6 km/h	80%	0%	0
Sun 9p	Clear	45°7° (likely 42°6° to 51°11°)	45°7°	0%	0 mph0 km/h, gusts 2 mph3 km/h	93%	0%	0
Sun 10p	Clear	42°6° (likely 40°4° to 50°10°)	42°6°	0%	0 mph0 km/h, gusts 2 mph4 km/h	100%	0%	0
Sun 11p	Clear	41°5° (likely 38°3° to 48°9°)	41°5°	0%	0 mph0 km/h, gusts 3 mph4 km/h	100%	0%	0
Mon 12a	Clear	40°4° (likely 37°3° to 48°9°)	40°4°	0%	0 mph0 km/h, gusts 3 mph5 km/h	100%	0%	0
Mon 1a	Clear	39°4° (likely 36°2° to 47°8°)	39°4°	0%	0 mph0 km/h, gusts 3 mph5 km/h	100%	0%	0
Mon 2a	Clear	39°4° (likely 35°2° to 46°8°)	39°4°	0%	0 mph0 km/h, gusts 3 mph4 km/h	100%	0%	0

Days ahead

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

Today, Oct 24. Sunny. High 62°17°, low 31°−1°. Typical 64°18° / 41°5°. Dry. Forecasts agree.
1. Morning
  6 AM–noon
  Sunny, 33°1°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 62°17°
  Dry
3. Evening
  6 PM–midnight
  Clear, 49°9°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 34°1°
  Dry
Official NWS forecast
Today: Areas of frost before 10am. Sunny, with a high near 62. East wind around 0 mph.
Tonight: Areas of frost. Partly cloudy, with a low around 31. Northeast wind around 0 mph.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
60°16°–62°17°
Low, likely
31°−1°–36°2°
Typical high / low
64°18° / 41°5°
Wind
6 mph10 km/h
UV peak
4
Tomorrow, Oct 25. Sunny. High 65°18°, low 36°2°. Typical 64°18° / 41°5°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 35°2°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 65°18°
  Dry
3. Evening
  6 PM–midnight
  Clear, 49°9°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 38°3°
  Dry
Official NWS forecast
Day: Areas of frost before 9am. Sunny, with a high near 65. Wind around 0 mph.
Night: Mostly clear, with a low around 36. Northwest wind around 0 mph.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
62°17°–66°19°
Low, likely
33°1°–38°3°
Typical high / low
64°18° / 41°5°
Wind
6 mph10 km/h
UV peak
4
Monday, Oct 26. Mostly sunny. High 68°20°, low 44°7°. Typical 64°18° / 40°4°. 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, 54°12°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 49°9°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Sunny, with a high near 68.
Night: Mostly clear, with a low around 44.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
65°18°–69°21°
Low, likely
33°1°–44°7°
Typical high / low
64°18° / 40°4°
Wind
7 mph12 km/h, gusts 15 mph25 km/h
UV peak
4
Tuesday, Oct 27. Mostly sunny. High 65°18°, low 40°4°. Typical 63°17° / 40°4°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 47°8°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 62°16°
  Dry
3. Evening
  6 PM–midnight
  Clear, 50°10°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 39°4°
  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 40.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
60°16°–65°18°
Low, likely
40°4°–46°8°
Typical high / low
63°17° / 40°4°
Wind
10 mph15 km/h, gusts 22 mph35 km/h
UV peak
4
Wednesday, Oct 28. Partly sunny. High 62°17°, low 44°7°. Typical 63°17° / 40°4°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 38°3°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 60°15°
  Dry
3. Evening
  6 PM–midnight
  Mostly clear, 51°11°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 44°7°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Mostly sunny, with a high near 62.
Night: Mostly cloudy, with a low around 44.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
58°14°–62°17°
Low, likely
35°2°–44°7°
Typical high / low
63°17° / 40°4°
Wind
7 mph12 km/h, gusts 15 mph24 km/h
UV peak
4
Thursday, Oct 29. Partly sunny. High 67°19°, low 48°9°. Typical 62°17° / 39°4°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 43°6°
  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: Mostly sunny, with a high near 67.
Night: Partly cloudy, with a low around 48.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
62°17°–67°19°
Low, likely
42°6°–48°9°
Typical high / low
62°17° / 39°4°
Wind
9 mph14 km/h, gusts 28 mph46 km/h
UV peak
4
Friday, Oct 30. Sunny. High 69°21°, low 45°7°. Typical 62°17° / 39°4°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Sunny, 45°7°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 69°20°
  Dry
3. Evening
  6 PM–midnight
  Clear, 56°13°
  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 69.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
66°19°–72°22°
Low, likely
43°6°–48°9°
Typical high / low
62°17° / 39°4°
Wind
9 mph14 km/h, gusts 23 mph37 km/h
UV peak
4
Saturday, Oct 31. Cloudy. High 67°19°, low 45°7°. Typical 62°17° / 39°4°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Sunny, 44°7°
  Dry
2. Afternoon
  noon–6 PM
  Partly sunny, 66°19°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 56°13°
  Dry
4. Overnight
  midnight–6 AM
  Partly cloudy, 47°8°
  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
61°16°–72°22°
Low, likely
41°5°–49°9°
Typical high / low
62°17° / 39°4°
Wind
8 mph13 km/h, gusts 21 mph33 km/h
UV peak
3
Sunday, Nov 1. Cloudy. High 65°18°, low 48°9°. Typical 61°16° / 38°3°. Rain 0.01 in0.3 mm, 20% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Cloudy, 47°9°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 63°17°
  20% chance
3. Evening
  6 PM–midnight
  Cloudy, 57°14°
  20% chance
4. Overnight
  midnight–6 AM
  Cloudy, 55°13°
  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
58°14°–70°21°
Low, likely
44°7°–54°12°
Typical high / low
61°16° / 38°3°
Wind
8 mph13 km/h, gusts 19 mph30 km/h
UV peak
2
Monday, Nov 2. Cloudy. High 67°19°, low 56°13°. Typical 61°16° / 38°3°. Rain 0.2 in5.1 mm, 30% chance. Mostly agree.
1. Morning
  6 AM–noon
  Cloudy, 58°15°
  20% chance · 0.01 in0.3 mm
2. Afternoon
  noon–6 PM
  Partly sunny, 68°20°
  20% chance · 0.09 in2.3 mm
3. Evening
  6 PM–midnight
  Partly cloudy, 59°15°
  30% chance · 0.07 in1.8 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°–69°21°
Low, likely
54°12°–59°15°
Typical high / low
61°16° / 38°3°
Wind
15 mph24 km/h, gusts 41 mph65 km/h
UV peak
3

10 days15 days30 days

The outlook

Today
Dry, high 62°, low 31°.
Tomorrow
Dry, high 65°, low 36°, warming up.
Monday
Dry, high 68°, low 44°, warming up.
Rest of week
Mostly dry, highs 62–69°.

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

Perkiomen Creek at Graterford

4.8 mi

Below flood stage

Level: 1.1 ft
Flow: 94 cfs

Forecast peak 1.1 ft Sat 8 AM

Reading from Sat 1:15 AM · NWS gauge page

Schuylkill River at Norristown

12 mi

Below flood stage

Level: 8.1 ft
Flow: 1,330 cfs

Forecast peak 8.1 ft Sat 8 AM

Reading from Sat 1:30 AM · NWS gauge page

Schuylkill River at Pottstown

14 mi

Below flood stage

Level: 2.1 ft
Flow: 918 cfs

Forecast peak 2.0 ft Sat 8 AM

Reading from Sat 1:15 AM · NWS gauge page

East Branch Perkiomen Creek at Schwenksville

2.6 mi

Below flood stage

Level: 2.7 ft
Flow: 29 cfs

Reading from Sat 1:15 AM · NWS gauge page

For your home

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

Heating this week

About 62% less heating than a typical week.

This week 36Typical 94

Heating degree days, base 65°F

Heat-pump hours, next 7 days

h below 47°F: 25
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 22 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 (air quality forecast not available for part of this window).

Is this typical?

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

Oct 24, today vs a typical year

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

Last 7 days vs normal

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

−5°−3°SunOct 18
−2°−1°MonOct 19
+1°±0°TueOct 20
−1°WedOct 21
+1°±0°ThuOct 22
—FriOct 23
—SatOct 24

Harleysville 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 29 min less
Golden hour: 5:31–6:25 PM; Morning 7:05–7:59 AM
Blue hour: 6:25–6:36 PM; Morning 6:54–7:05 AM; first light 6:54 AM

Stars tonight? Fair

Mostly clear 3:22–6 AM, but the moon is 96% lit and up.

Moon

Waxing gibbous

95% lit · growing

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

Looking west from Harleysville. The highest point on the skyline is about 4,000 ft, 60 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

Freeze Warning

Harleysville, PA weather

Next 2 hours

Next 48 hours

Days ahead

The outlook

Today

Tomorrow

Monday

Rest of week

What changed since yesterday

Radar

Rivers

Perkiomen Creek at Graterford

Schuylkill River at Norristown

Schuylkill River at Pottstown

East Branch Perkiomen Creek at Schwenksville

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