Freeze Watch
Starts in 12 h 29 min
When
From late tonight through Saturday morning.
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 32 possible.
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 11:00 AM EDT at KABE

Coopersburg, PA weather

Sunny and 55°13°.

Forecasts agree

Now 55°13°

Sunny

Wind: 14 mph22 km/h; From the northeast. 58–14 mph22 km/h through 11 PM
Dew point: 36°2°; Comfortable · down to 27°−3° by 8 PM (dry)
UV index: 2Low; Moderate 12–3 PM · peak 3
Air quality: 41Good; Main pollutant: PM2.5 (fine particles)
Pressure: 30.38 inHg1029 hPa; Steady over the last 3 h

No precipitation expected in the next 2 hours.

From forecast models

Next 48 hours

Good hours for

High 60°16° today at 3 PM
Below 50°10° tonight after 8 PM
Low 32°0° tomorrow at 6 AM
Above 50°10° tomorrow by 11 AM
Below freezing Sunday 6–8 AM (low 32°0°)

This afternoonUp to 60°16° by 3 PM · Clear
TonightDown to 34°1° by 5 AM · Partly cloudy
Tomorrow morningUp to 53°12° by 11 AM · freezing, low 32°0° · Partly cloudy
Tomorrow afternoonUp to 61°16° by 3 PM · Clear
Tomorrow nightDown to 33°1° by 4 AM · Clear
Sunday morningUp to 47°8° by 10 AM · freezing, low 32°0° · Clear

Hourly forecast, next 48 hours, in the place's local time
Hour	Conditions	Temperature	Feels like	Precipitation	Wind	Humidity	Cloud cover	UV index
Fri 11a	Sunny	53°12° (likely 53°12° to 55°13°)	53°12°	0%	10 mph16 km/h from NE, gusts 17 mph27 km/h	48%	0%	2
Fri 12p	Sunny	55°13° (likely 55°13° to 57°14°)	55°13°	0%	10 mph16 km/h from NE, gusts 15 mph24 km/h	43%	0%	3
Fri 1p	Sunny	57°14° (likely 57°14° to 58°14°)	57°14°	0%	10 mph16 km/h from NE, gusts 12 mph19 km/h	38%	1%	3
Fri 2p	Sunny	59°15° (likely 58°14° to 60°16°)	59°15°	0%	5 mph8 km/h from NE, gusts 11 mph18 km/h	34%	2%	3
Fri 3p	Sunny	60°16° (likely 58°14° to 60°16°)	60°16°	0%	5 mph8 km/h from NE, gusts 10 mph15 km/h	35%	1%	2
Fri 4p	Sunny	60°16° (likely 58°14° to 60°16°)	60°16°	0%	5 mph8 km/h from NE, gusts 9 mph14 km/h	35%	1%	1
Fri 5p	Sunny	59°15° (likely 57°14° to 59°15°)	59°15°	0%	5 mph8 km/h from NE, gusts 8 mph13 km/h	37%	1%	0
Fri 6p	Partly cloudy	57°14° (likely 53°12° to 57°14°)	57°14°	0%	5 mph8 km/h from NE, gusts 6 mph10 km/h	37%	26%	0
Fri 7p	Partly cloudy	51°11° (likely 49°9° to 51°11°)	51°11°	0%	5 mph8 km/h from NE, gusts 4 mph7 km/h	42%	44%	0
Fri 8p	Partly cloudy	46°8° (likely 46°8° to 49°9°)	42°6°	0%	5 mph8 km/h from NE, gusts 3 mph5 km/h	47%	49%	0
Fri 9p	Partly cloudy	45°7° (likely 45°7° to 48°9°)	42°6°	0%	5 mph8 km/h from NE, gusts 3 mph6 km/h	47%	54%	0
Fri 10p	Cloudy	42°6° (likely 42°6° to 47°8°)	38°3°	0%	5 mph8 km/h from NE, gusts 4 mph7 km/h	53%	65%	0
Fri 11p	Cloudy	40°4° (likely 40°4° to 45°7°)	36°2°	0%	5 mph8 km/h from NE, gusts 4 mph7 km/h	57%	64%	0
Sat 12a	Partly cloudy	38°3° (likely 38°3° to 44°7°)	34°1°	0%	5 mph8 km/h from NE, gusts 3 mph5 km/h	59%	49%	0
Sat 1a	Clear	37°3° (likely 37°3° to 43°6°)	33°1°	0%	5 mph8 km/h from NE, gusts 2 mph3 km/h	61%	41%	0
Sat 2a	Clear	35°2° (likely 35°2° to 42°6°)	31°−1°	0%	5 mph8 km/h from NE, gusts 2 mph3 km/h	69%	38%	0
Sat 3a	Clear	35°2° (likely 35°2° to 42°6°)	31°−1°	0%	5 mph8 km/h from NE, gusts 3 mph4 km/h	69%	44%	0
Sat 4a	Partly cloudy	35°2° (likely 35°2° to 41°5°)	32°0°	0%	5 mph8 km/h from NE, gusts 3 mph5 km/h	69%	51%	0
Sat 5a	Partly cloudy	34°1° (likely 33°1° to 40°4°)	31°−1°	0%	5 mph8 km/h from N, gusts 4 mph6 km/h	72%	61%	0
Sat 6a	Partly cloudy	32°0° (likely 32°0° to 40°4°)	29°−2°	0%	5 mph8 km/h from N, gusts 4 mph6 km/h	78%	60%	0
Sat 7a	Mostly sunny	33°1° (likely 33°1° to 39°4°)	30°−1°	0%	5 mph8 km/h from N, gusts 5 mph8 km/h	78%	54%	0
Sat 8a	Cloudy	34°1° (likely 33°1° to 39°4°)	30°−1°	0%	5 mph8 km/h from N, gusts 5 mph8 km/h	78%	53%	0
Sat 9a	Partly sunny	39°4° (likely 38°3° to 45°7°)	36°2°	0%	5 mph8 km/h from NE, gusts 5 mph8 km/h	67%	54%	1
Sat 10a	Cloudy	48°9° (likely 47°8° to 49°9°)	46°8°	0%	5 mph8 km/h from NE, gusts 4 mph6 km/h	51%	58%	2
Sat 11a	Mostly sunny	53°12° (likely 53°12° to 54°12°)	53°12°	0%	5 mph8 km/h from NE, gusts 4 mph7 km/h	46%	51%	3
Sat 12p	Sunny	55°13° (likely 55°13° to 57°14°)	55°13°	0%	0 mph0 km/h, gusts 4 mph7 km/h	43%	9%	3
Sat 1p	Sunny	59°15° (likely 57°14° to 59°15°)	59°15°	0%	0 mph0 km/h, gusts 5 mph8 km/h	37%	7%	4
Sat 2p	Sunny	60°16° (likely 58°14° to 60°16°)	60°16°	0%	5 mph8 km/h from SW, gusts 4 mph7 km/h	36%	2%	4
Sat 3p	Sunny	61°16° (likely 59°15° to 61°16°)	61°16°	0%	5 mph8 km/h from SW, gusts 4 mph6 km/h	35%	4%	3
Sat 4p	Sunny	61°16° (likely 59°15° to 61°16°)	61°16°	0%	5 mph8 km/h from SW, gusts 4 mph7 km/h	36%	4%	2
Sat 5p	Sunny	60°16° (likely 58°14° to 60°16°)	60°16°	0%	5 mph8 km/h from SW, gusts 4 mph7 km/h	37%	2%	1
Sat 6p	Clear	57°14° (likely 53°12° to 57°14°)	57°14°	0%	5 mph8 km/h from SW, gusts 5 mph8 km/h	40%	7%	0
Sat 7p	Clear	53°12° (likely 50°10° to 53°12°)	53°12°	0%	5 mph8 km/h from SW, gusts 5 mph7 km/h	44%	2%	0
Sat 8p	Clear	46°8° (likely 46°8° to 49°9°)	43°6°	0%	5 mph8 km/h from SW, gusts 4 mph6 km/h	55%	3%	0
Sat 9p	Clear	45°7° (likely 45°7° to 47°8°)	42°6°	0%	5 mph8 km/h from SW, gusts 4 mph7 km/h	55%	0%	0
Sat 10p	Clear	43°6° (likely 43°6° to 47°8°)	40°4°	0%	5 mph8 km/h from SW, gusts 4 mph6 km/h	62%	0%	0
Sat 11p	Clear	41°5° (likely 41°5° to 46°8°)	39°4°	0%	5 mph8 km/h from SW, gusts 5 mph8 km/h	67%	0%	0
Sun 12a	Clear	39°4° (likely 39°4° to 43°6°)	37°3°	0%	5 mph8 km/h from W, gusts 6 mph10 km/h	76%	0%	0
Sun 1a	Clear	37°3° (likely 37°3° to 42°6°)	34°1°	0%	5 mph8 km/h from W, gusts 6 mph9 km/h	85%	0%	0
Sun 2a	Clear	35°2° (likely 35°2° to 42°6°)	32°0°	0%	5 mph8 km/h from NW, gusts 5 mph9 km/h	96%	0%	0
Sun 3a	Clear	34°1° (likely 34°1° to 41°5°)	31°−1°	0%	5 mph8 km/h from NW, gusts 5 mph8 km/h	100%	0%	0
Sun 4a	Clear	33°1° (likely 33°1° to 42°6°)	29°−2°	0%	5 mph8 km/h from NW, gusts 5 mph7 km/h	100%	0%	0
Sun 5a	Clear	33°1° (likely 32°0° to 41°5°)	29°−2°	0%	5 mph8 km/h from NW, gusts 4 mph6 km/h	100%	0%	0
Sun 6a	Clear	32°0° (likely 32°0° to 41°5°)	27°−3°	0%	5 mph8 km/h from NW, gusts 3 mph5 km/h	100%	0%	0
Sun 7a	Sunny	32°0° (likely 31°−1° to 40°4°)	27°−3°	0%	5 mph8 km/h from NW, gusts 3 mph5 km/h	100%	0%	0
Sun 8a	Sunny	34°1° (likely 31°−1° to 40°4°)	30°−1°	0%	5 mph8 km/h from NW, gusts 3 mph5 km/h	100%	0%	0
Sun 9a	Sunny	39°4° (likely 35°2° to 46°8°)	36°2°	0%	5 mph8 km/h from NW, gusts 4 mph7 km/h	89%	1%	1
Sun 10a	Sunny	47°8° (likely 41°5° to 51°11°)	45°7°	0%	5 mph8 km/h from NW, gusts 4 mph7 km/h	68%	0%	2

Days ahead

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

Today, Oct 23. Mostly sunny. High 60°16°, low 31°−1°. Typical 63°17° / 41°5°. Dry. Forecasts agree.
1. Afternoon
  noon–6 PM
  Sunny, 60°16°
  Dry
2. Evening
  6 PM–midnight
  Partly cloudy, 46°8°
  Dry
3. Overnight
  midnight–6 AM
  Clear, 34°1°
  Dry
Official NWS forecast
Today: Sunny, with a high near 60. Northeast wind 5 to 10 mph, with gusts as high as 25 mph.
Tonight: Areas of frost after midnight. Partly cloudy, with a low around 31. Northeast wind around 5 mph.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
58°14°–60°16°
Low, likely
31°−1°–44°7°
Typical high / low
63°17° / 41°5°
Wind
10 mph16 km/h, gusts 23 mph37 km/h
UV peak
4
Tomorrow, Oct 24. Mostly sunny. High 61°16°, low 32°0°. Typical 62°17° / 41°5°. Dry. Forecasts agree.
1. Morning
  6 AM–noon
  Partly sunny, 34°1°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 61°16°
  Dry
3. Evening
  6 PM–midnight
  Clear, 46°8°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 33°1°
  Dry
Official NWS forecast
Day: Widespread frost before 10am. Sunny, with a high near 61. Northeast wind 0 to 5 mph.
Night: Widespread frost after midnight. Mostly clear, with a low around 32. West wind around 5 mph.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
59°15°–61°16°
Low, likely
32°0°–39°4°
Typical high / low
62°17° / 41°5°
Wind
6 mph10 km/h
UV peak
4
Sunday, Oct 25. Sunny. High 65°18°, low 35°2°. Typical 62°17° / 41°5°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 34°1°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 62°17°
  Dry
3. Evening
  6 PM–midnight
  Clear, 48°9°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 39°4°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Widespread frost before 10am. Sunny, with a high near 65. Northwest wind around 5 mph.
Night: Mostly clear, with a low around 35.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
61°16°–65°18°
Low, likely
31°−1°–39°4°
Typical high / low
62°17° / 41°5°
Wind
5 mph9 km/h
UV peak
4
Monday, Oct 26. Mostly sunny. High 68°20°, low 44°7°. Typical 62°17° / 40°4°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 38°3°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 67°19°
  Dry
3. Evening
  6 PM–midnight
  Clear, 54°12°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 48°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
34°1°–44°7°
Typical high / low
62°17° / 40°4°
Wind
7 mph12 km/h, gusts 18 mph28 km/h
UV peak
4
Tuesday, Oct 27. Mostly sunny. High 64°18°, low 37°3°. Typical 61°16° / 40°4°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 47°8°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 63°17°
  Dry
3. Evening
  6 PM–midnight
  Mostly clear, 51°11°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 41°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 37.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
60°16°–65°18°
Low, likely
37°3°–47°8°
Typical high / low
61°16° / 40°4°
Wind
8 mph13 km/h, gusts 20 mph31 km/h
UV peak
4
Wednesday, Oct 28. Cloudy. High 60°16°, low 41°5°. Typical 61°16° / 40°4°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Partly sunny, 41°5°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 59°15°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 51°11°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 46°8°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Mostly sunny, with a high near 60.
Night: Mostly cloudy, with a low around 41.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
57°14°–62°17°
Low, likely
36°2°–45°7°
Typical high / low
61°16° / 40°4°
Wind
7 mph11 km/h, gusts 14 mph23 km/h
UV peak
2
Thursday, Oct 29. Partly sunny. High 65°18°, low 43°6°. Typical 61°16° / 39°4°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Partly sunny, 46°8°
  Dry
2. Afternoon
  noon–6 PM
  Partly sunny, 64°18°
  Dry
3. Evening
  6 PM–midnight
  Clear, 55°13°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 48°9°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Mostly sunny, with a high near 65.
Night: Partly cloudy, with a low around 43.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
63°17°–68°20°
Low, likely
40°4°–49°9°
Typical high / low
61°16° / 39°4°
Wind
13 mph21 km/h, gusts 29 mph47 km/h
UV peak
3
Friday, Oct 30. Cloudy. High 66°19°, low 48°9°. Typical 60°16° / 39°4°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Sunny, 48°9°
  Dry
2. Afternoon
  noon–6 PM
  Mostly sunny, 65°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.
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°–70°21°
Low, likely
46°8°–51°11°
Typical high / low
60°16° / 39°4°
Wind
8 mph13 km/h, gusts 22 mph35 km/h
UV peak
4
Saturday, Oct 31. Sunny. High 60°16°, low 45°7°. Typical 60°16° / 39°4°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Sunny, 47°8°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 57°14°
  Dry
3. Evening
  6 PM–midnight
  Clear, 48°9°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 40°4°
  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
53°12°–67°19°
Low, likely
37°3°–53°12°
Typical high / low
60°16° / 39°4°
Wind
10 mph15 km/h, gusts 24 mph39 km/h
UV peak
2
Sunday, Nov 1. Rain. High 61°16°, low 47°8°. Typical 60°16° / 38°3°. Rain 0.66 in17 mm, 30% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Sunny, 40°5°
  Dry
2. Afternoon
  noon–6 PM
  Rain, 56°13°
  20% chance · 0.2 in5.1 mm
3. Evening
  6 PM–midnight
  Rain, 51°10°
  30% chance · 0.47 in12 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
58°14°–66°19°
Low, likely
36°2°–54°12°
Typical high / low
60°16° / 38°3°
Wind
11 mph17 km/h, gusts 30 mph48 km/h

10 days15 days30 days

The outlook

Today
Dry, high 60°, low 31°.
Tomorrow
Dry, high 61°, low 32°.
Sunday
Dry, high 65°, low 35°, warming up.
Rest of week
Mostly dry, highs 60–68°.

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

Lehigh River at Bethlehem

7.3 mi

Below flood stage

Level: 1.7 ft
Flow: 1,110 cfs

Forecast peak 1.7 ft Fri 2 PM

Reading from Fri 9:30 AM · NWS gauge page

Jordan Creek at Allentown

9.1 mi

Below flood stage

Level: 1.7 ft
Flow: 41 cfs

Forecast peak 1.7 ft Fri 2 PM

Reading from Fri 9:45 AM · NWS gauge page

Delaware River at Riegelsville

12 mi

Below flood stage

Level: 3.4 ft
Flow: 4,170 cfs

Forecast peak 3.4 ft Fri 2 PM

Reading from Fri 9:30 AM · NWS gauge page

Delaware River at Easton

16 mi

Below flood stage

Level: 1.8 ft

Forecast peak 1.8 ft Fri 2 PM

Reading from Fri 9:30 AM · NWS gauge page

For your home

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

Heating this week

About 60% less heating than a typical week.

This week 39Typical 98

Heating degree days, base 65°F

Heat-pump hours, next 7 days

h below 47°F: 29
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 9 hours are near freezing and damp, when outdoor units defrost more often.

Comfort

Dry air outside (dew point 36°F).

Open the windows?

Today, 3:00 PM–4:00 PM

Good stretch to open the windows.

Is this typical?

Allentown Lehigh Valley International Airport · official normals 1991–2020 · records 1922–2026

Oct 23, today vs a typical year

Today’s expected high is 3°2° colder than typical.

Last 7 days vs normal

On average 4°2° colder than normal (daily mean temperature).

−9°−5°SatOct 17
−8°−5°SunOct 18
−3°−2°MonOct 19
+1°±0°TueOct 20
−3°−2°WedOct 21
±0°ThuOct 22
—FriOct 23

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

Sun & moon

Sun

Daylight: 10 h 48 min; Losing 2 min 30 s a day; shortest Dec 21, 1 h 32 min less
Golden hour: 5:32–6:26 PM; Morning 7:04–7:59 AM
Blue hour: 6:26–6:37 PM; Morning 6:53–7:04 AM; first light 6:53 AM

Stars tonight? Poor

Clouds most of the night (about 50% cover).

Moon

Waxing gibbous

92% lit · growing

Today: sets 4:25 AM · rises 4:41 PM
Full moon: Oct 26
New moon: Nov 9

Looking northwest from Coopersburg. The highest point on the skyline is about 1,600 ft, 21 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 Watch

Coopersburg, PA weather

Next 2 hours

Next 48 hours

Days ahead

The outlook

Today

Tomorrow

Sunday

Rest of week

What changed since yesterday

Radar

Rivers

Lehigh River at Bethlehem

Jordan Creek at Allentown

Delaware River at Riegelsville

Delaware River at Easton

For your home

Heating this week

Heat-pump hours, next 7 days

Comfort

Open the windows?

Is this typical?

Oct 23, today vs a typical year

Last 7 days vs normal

Sun & moon

Sun

Stars tonight? Poor

Moon