Freeze Warning
Starts in 1 h 9 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 9:55 PM EDT at KMUI

Frystown, PA weather

Freeze Warning. 44°7° and mostly cloudy now.

Forecasts agree

Now 44°7°

Mostly cloudy

Wind: Calm; Light through 10 AM
Dew point: 38°3°; Comfortable
UV tomorrow: 4Moderate; Moderate 11 AM–4 PM · peak 4
Pressure: 30.42 inHg1030 hPa; Rising slowly · +0.02 inHg+0.8 hPa in 3 h

No precipitation expected in the next 2 hours.

From forecast models

Next 48 hours

15°8° cooler than this time yesterday (59°15° then, 44°7° now)

Good hours for

Low 32°0° tonight at 4 AM
Above 50°10° tomorrow by 11 AM
High 61°16° tomorrow at 4 PM
Drops 12°7° tomorrow night 6–9 PM (57°14° → 45°7°)
Below 50°10° tomorrow night after 8 PM

TonightDown to 32°0° by 4 AM · freezing, low 32°0° · Clear
Tomorrow morningUp to 54°12° by 11 AM · freezing, low 32°0° · Clear
Tomorrow afternoonUp to 61°16° by 4 PM · Clear
Tomorrow nightDown to 33°1° by 4 AM · Clear
Sunday morningUp to 56°13° by 11 AM · Clear
Sunday afternoonUp to 64°18° by 3 PM · Clear
Sunday nightDown to 46°8° by 9 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
Fri 10p	Clear	40°4° (likely 40°4° to 47°8°)	40°4°	0%	0 mph0 km/h, gusts 4 mph6 km/h	82%	15%	0
Fri 11p	Clear	39°4° (likely 39°4° to 46°8°)	39°4°	0%	0 mph0 km/h, gusts 5 mph8 km/h	85%	2%	0
Sat 12a	Clear	37°3° (likely 37°3° to 44°7°)	37°3°	0%	0 mph0 km/h, gusts 5 mph8 km/h	89%	1%	0
Sat 1a	Clear	36°2° (likely 36°2° to 43°6°)	36°2°	0%	0 mph0 km/h, gusts 5 mph8 km/h	92%	1%	0
Sat 2a	Clear	35°2° (likely 35°2° to 43°6°)	35°2°	0%	0 mph0 km/h, gusts 4 mph7 km/h	92%	8%	0
Sat 3a	Mostly clear	33°1° (likely 33°1° to 41°5°)	33°1°	0%	0 mph0 km/h, gusts 3 mph4 km/h	100%	34%	0
Sat 4a	Clear	32°0° (likely 32°0° to 41°5°)	32°0°	0%	0 mph0 km/h, gusts 3 mph5 km/h	100%	21%	0
Sat 5a	Clear	33°1° (likely 33°1° to 41°5°)	33°1°	0%	0 mph0 km/h, gusts 4 mph7 km/h	100%	17%	0
Sat 6a	Clear	32°0° (likely 32°0° to 40°4°)	32°0°	0%	0 mph0 km/h, gusts 5 mph8 km/h	100%	23%	0
Sat 7a	Sunny	33°1° (likely 33°1° to 39°4°)	33°1°	0%	0 mph0 km/h, gusts 5 mph8 km/h	100%	4%	0
Sat 8a	Sunny	35°2° (likely 35°2° to 39°4°)	35°2°	0%	0 mph0 km/h, gusts 5 mph8 km/h	89%	0%	0
Sat 9a	Sunny	41°5° (likely 41°5° to 43°6°)	41°5°	0%	0 mph0 km/h, gusts 5 mph8 km/h	76%	1%	1
Sat 10a	Sunny	49°9° (likely 48°9° to 50°10°)	49°9°	0%	0 mph0 km/h, gusts 5 mph8 km/h	61%	4%	2
Sat 11a	Sunny	54°12° (likely 51°11° to 55°13°)	54°12°	0%	0 mph0 km/h, gusts 3 mph5 km/h	55%	5%	3
Sat 12p	Sunny	56°13° (likely 54°12° to 57°14°)	56°13°	0%	0 mph0 km/h, gusts 4 mph6 km/h	51%	4%	4
Sat 1p	Sunny	59°15° (likely 56°13° to 59°15°)	59°15°	0%	0 mph0 km/h, gusts 4 mph7 km/h	45%	2%	4
Sat 2p	Sunny	59°15° (likely 58°14° to 60°16°)	59°15°	0%	0 mph0 km/h, gusts 5 mph7 km/h	44%	0%	4
Sat 3p	Sunny	60°16° (likely 59°15° to 60°16°)	60°16°	0%	0 mph0 km/h, gusts 4 mph7 km/h	42%	0%	3
Sat 4p	Sunny	61°16° (likely 59°15° to 61°16°)	61°16°	0%	0 mph0 km/h, gusts 5 mph8 km/h	41%	0%	2
Sat 5p	Sunny	59°15° (likely 57°14° to 59°15°)	59°15°	0%	0 mph0 km/h, gusts 5 mph8 km/h	44%	0%	1
Sat 6p	Clear	57°14° (likely 53°12° to 57°14°)	57°14°	0%	0 mph0 km/h, gusts 5 mph7 km/h	49%	0%	0
Sat 7p	Clear	52°11° (likely 50°10° to 52°11°)	52°11°	0%	0 mph0 km/h, gusts 3 mph6 km/h	56%	0%	0
Sat 8p	Clear	45°7° (likely 45°7° to 49°9°)	45°7°	0%	0 mph0 km/h, gusts 5 mph8 km/h	73%	0%	0
Sat 9p	Clear	43°6° (likely 43°6° to 48°9°)	43°6°	0%	0 mph0 km/h, gusts 2 mph4 km/h	79%	0%	0
Sat 10p	Clear	41°5° (likely 41°5° to 47°8°)	41°5°	0%	0 mph0 km/h, gusts 3 mph5 km/h	82%	0%	0
Sat 11p	Clear	40°4° (likely 40°4° to 46°8°)	40°4°	0%	0 mph0 km/h, gusts 3 mph4 km/h	89%	0%	0
Sun 12a	Clear	38°3° (likely 38°3° to 45°7°)	38°3°	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	96%	0%	0
Sun 2a	Clear	35°2° (likely 35°2° to 43°6°)	35°2°	0%	0 mph0 km/h, gusts 2 mph3 km/h	100%	0%	0
Sun 3a	Clear	34°1° (likely 34°1° to 43°6°)	34°1°	0%	0 mph0 km/h, gusts 2 mph4 km/h	100%	0%	0
Sun 4a	Clear	33°1° (likely 33°1° to 42°6°)	33°1°	0%	0 mph0 km/h, gusts 3 mph5 km/h	100%	0%	0
Sun 5a	Clear	33°1° (likely 33°1° to 42°6°)	33°1°	0%	0 mph0 km/h, gusts 3 mph4 km/h	100%	0%	0
Sun 6a	Clear	33°1° (likely 33°1° to 42°6°)	33°1°	0%	0 mph0 km/h, gusts 2 mph4 km/h	100%	0%	0
Sun 7a	Sunny	33°1° (likely 33°1° to 41°5°)	33°1°	0%	0 mph0 km/h, gusts 2 mph3 km/h	100%	0%	0
Sun 8a	Sunny	35°2° (likely 35°2° to 40°4°)	35°2°	0%	0 mph0 km/h, gusts 2 mph3 km/h	100%	0%	0
Sun 9a	Sunny	41°5° (likely 41°5° to 44°7°)	41°5°	0%	0 mph0 km/h, gusts 1 mph2 km/h	93%	0%	1
Sun 10a	Sunny	49°9° (likely 49°9° to 50°10°)	49°9°	0%	0 mph0 km/h, gusts 2 mph3 km/h	74%	0%	2
Sun 11a	Sunny	56°13° (likely 53°12° to 56°13°)	56°13°	0%	0 mph0 km/h, gusts 5 mph8 km/h	62%	1%	3
Sun 12p	Sunny	60°16° (likely 56°13° to 60°16°)	60°16°	0%	0 mph0 km/h, gusts 6 mph10 km/h	51%	2%	4
Sun 1p	Sunny	62°17° (likely 58°14° to 62°17°)	62°17°	0%	0 mph0 km/h, gusts 8 mph12 km/h	48%	4%	4
Sun 2p	Sunny	63°17° (likely 59°15° to 63°17°)	63°17°	0%	5 mph8 km/h from SW, gusts 8 mph13 km/h	46%	5%	4
Sun 3p	Sunny	64°18° (likely 60°16° to 64°18°)	64°18°	0%	5 mph8 km/h from SW, gusts 9 mph15 km/h	46%	3%	3
Sun 4p	Sunny	64°18° (likely 60°16° to 64°18°)	64°18°	0%	5 mph8 km/h from SW, gusts 8 mph14 km/h	46%	1%	2
Sun 5p	Sunny	62°17° (likely 59°15° to 62°17°)	62°17°	0%	0 mph0 km/h, gusts 7 mph12 km/h	52%	0%	1
Sun 6p	Clear	58°14° (likely 55°13° to 58°14°)	58°14°	0%	0 mph0 km/h, gusts 5 mph8 km/h	60%	0%	0
Sun 7p	Clear	53°12° (likely 50°10° to 53°12°)	53°12°	0%	0 mph0 km/h, gusts 2 mph4 km/h	71%	0%	0
Sun 8p	Clear	48°9° (likely 47°8° to 50°10°)	48°9°	0%	0 mph0 km/h, gusts 2 mph3 km/h	83%	1%	0
Sun 9p	Clear	46°8° (likely 44°7° to 48°9°)	46°8°	0%	0 mph0 km/h, gusts 3 mph4 km/h	89%	0%	0

Days ahead

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

Today, Oct 23. Partly sunny. High 60°16°, low 32°0°. Typical 62°17° / 41°5°. Dry. Forecasts agree.
1. Evening
  6 PM–midnight
  Clear, 39°4°
  Dry
2. Overnight
  midnight–6 AM
  Mostly clear, 32°0°
  Dry
Official NWS forecast
Tonight: Areas of frost after midnight. Partly cloudy, with a low around 32. East wind around 0 mph.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
60°16°–61°16°
Low, likely
32°0°–44°7°
Typical high / low
62°17° / 41°5°
Wind
10 mph17 km/h, gusts 24 mph38 km/h
UV peak
4
Tomorrow, Oct 24. Sunny. High 61°16°, low 33°1°. Typical 61°16° / 41°5°. Dry. Forecasts agree.
1. Morning
  6 AM–noon
  Sunny, 35°2°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 61°16°
  Dry
3. Evening
  6 PM–midnight
  Clear, 45°7°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 33°1°
  Dry
Official NWS forecast
Day: Areas of frost before 10am. Sunny, with a high near 61. East wind around 0 mph.
Night: Areas of frost after 10pm. Clear, with a low around 33. South wind around 0 mph.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
59°15°–61°16°
Low, likely
33°1°–38°3°
Typical high / low
61°16° / 41°5°
Wind
5 mph9 km/h
UV peak
4
Sunday, Oct 25. Sunny. High 64°18°, low 37°3°. Typical 61°16° / 41°5°. Dry. Forecasts agree.
1. Morning
  6 AM–noon
  Sunny, 35°2°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 64°18°
  Dry
3. Evening
  6 PM–midnight
  Clear, 48°9°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 40°4°
  Dry
Official NWS forecast
Day: Areas of frost before 9am. Sunny, with a high near 64. West wind 0 to 5 mph.
Night: Mostly clear, with a low around 37. Northwest wind around 0 mph.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
60°16°–64°18°
Low, likely
36°2°–39°4°
Typical high / low
61°16° / 41°5°
Wind
7 mph11 km/h, gusts 12 mph20 km/h
UV peak
4
Monday, Oct 26. Sunny. High 68°20°, low 44°7°. Typical 60°16° / 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, 53°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°–68°20°
Low, likely
35°2°–44°7°
Typical high / low
60°16° / 40°4°
Wind
11 mph18 km/h
UV peak
4
Tuesday, Oct 27. Mostly sunny. High 65°18°, low 41°5°. Typical 60°16° / 40°4°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 46°8°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 62°17°
  Dry
3. Evening
  6 PM–midnight
  Clear, 50°10°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 40°5°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Sunny, with a high near 65.
Night: Partly cloudy, with a low around 41.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
60°16°–65°18°
Low, likely
41°5°–46°8°
Typical high / low
60°16° / 40°4°
Wind
12 mph19 km/h, gusts 23 mph37 km/h
UV peak
4
Wednesday, Oct 28. Cloudy. High 61°16°, low 44°7°. Typical 60°16° / 40°4°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Partly sunny, 40°4°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 59°15°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 51°10°
  Dry
4. Overnight
  midnight–6 AM
  Mostly clear, 46°8°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Partly sunny, with a high near 61.
Night: Mostly cloudy, with a low around 44.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
56°13°–61°16°
Low, likely
37°3°–44°7°
Typical high / low
60°16° / 40°4°
Wind
8 mph12 km/h, gusts 17 mph27 km/h
UV peak
4
Thursday, Oct 29. Partly sunny. High 68°20°, low 47°8°. Typical 59°15° / 39°4°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Sunny, 46°8°
  Dry
2. Afternoon
  noon–6 PM
  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 68.
Night: Partly cloudy, with a low around 47.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
62°17°–68°20°
Low, likely
40°4°–49°9°
Typical high / low
59°15° / 39°4°
Wind
9 mph15 km/h, gusts 25 mph40 km/h
UV peak
4
Friday, Oct 30. Partly sunny. High 69°21°, low 46°8°. Typical 59°15° / 39°4°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Sunny, 46°8°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 66°19°
  Dry
3. Evening
  6 PM–midnight
  Clear, 53°12°
  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 69.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
63°17°–72°22°
Low, likely
45°7°–47°8°
Typical high / low
59°15° / 39°4°
Wind
10 mph16 km/h, gusts 18 mph29 km/h
UV peak
4
Saturday, Oct 31. Cloudy. High 67°19°, low 46°8°. Typical 58°14° / 39°4°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 46°8°
  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, 45°7°
  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.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
65°18°–70°21°
Low, likely
43°6°–49°9°
Typical high / low
58°14° / 39°4°
Wind
9 mph14 km/h
UV peak
4
Sunday, Nov 1. Cloudy. High 63°17°, low 46°8°. Typical 58°14° / 38°3°. Rain 0.02 in0.5 mm, 30% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Mostly sunny, 44°7°
  30% chance
2. Afternoon
  noon–6 PM
  Cloudy, 62°16°
  30% chance
3. Evening
  6 PM–midnight
  Partly cloudy, 55°13°
  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
58°14°–68°20°
Low, likely
42°6°–53°12°
Typical high / low
58°14° / 38°3°
Wind
8 mph13 km/h, gusts 20 mph32 km/h
UV peak
3

10 days15 days30 days

The outlook

Today
Dry, high 60°, low 32°.
Tomorrow
Dry, high 61°, low 33°.
Sunday
Dry, high 64°, low 37°, warming up.
Rest of week
Mostly dry, highs 61–69°.

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

Swatara Creek at Harper Tavern

14 mi

Below flood stage

Level: 0.7 ft
Flow: 223 cfs

Forecast peak 0.7 ft Sat 2 AM

Reading from Fri 9:15 PM · NWS gauge page

Schuylkill River at Berne

18 mi

Below flood stage

Level: 5.1 ft
Flow: 276 cfs

Forecast peak 5.1 ft Sat 2 AM

Reading from Fri 9 PM · NWS gauge page

Swatara Creek near Hershey

21 mi

Below flood stage

Level: 1.8 ft
Flow: 326 cfs

Forecast peak 1.9 ft Sat 2 AM

Reading from Fri 8:45 PM · NWS gauge page

Swatara Creek near Pine Grove

6.7 mi

Level: 3.3 ft
Flow: 82 cfs

Reading from Fri 9:30 PM · NWS gauge page

For your home

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

Heating this week

About 64% less heating than a typical week.

This week 37Typical 103

Heating degree days, base 65°F

Heat-pump hours, next 7 days

h below 47°F: 26
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 38°F).

Open the windows?

Sat, 3:00 PM–4:00 PM

Good stretch to open the windows (air quality forecast not available for part of this window).

Is this typical?

LEBANON 2 W · official normals 1991–2020 · records 1965–2026

Oct 23, today vs a typical year

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

Last 7 days vs normal

—SatOct 17
—SunOct 18
—MonOct 19
—TueOct 20
—WedOct 21
—ThuOct 22
—FriOct 23

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

Sun & moon

Sun

Daylight: 10 h 49 min; Losing 2 min 30 s a day; shortest Dec 21, 1 h 32 min less
Golden hour: 5:35–6:30 PM; Morning 7:07–8:02 AM
Blue hour: 6:30–6:41 PM; Morning 6:57–7:07 AM; first light 6:57 AM

Stars tonight? Fair

Mostly clear 10:51 PM–3 AM, but the moon is 95% lit and up.

Moon

Waxing gibbous

95% lit · growing

Today: sets 4:28 AM · rises 4:45 PM
Full moon: Oct 26
New moon: Nov 9

Looking north from Frystown. The highest point on the skyline is about 1,700 ft, 5 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

Frystown, PA weather

Next 2 hours

Next 48 hours

Days ahead

The outlook

Today

Tomorrow

Sunday

Rest of week

What changed since yesterday

Radar

Rivers

Swatara Creek at Harper Tavern

Schuylkill River at Berne

Swatara Creek near Hershey

Swatara Creek near Pine Grove

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? Fair

Moon