Freeze Warning
Starts in 3 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 8:05 PM EDT at KPTW

Lionville, PA weather

Freeze Warning. 45°7° and clear now.

Forecasts agree

Now 45°7°

Clear

Wind: Calm; Up to 5 mph8 km/h through 8 AM
Dew point: 36°2°; Comfortable
UV tomorrow: 4Moderate; Moderate 11 AM–4 PM · peak 4
Air quality: 33Good; Main pollutant: PM2.5 (fine particles)
Pressure: 30.43 inHg1030 hPa; Rising slowly · +0.04 inHg+1.4 hPa in 3 h

No precipitation expected in the next 2 hours.

From forecast models

Next 48 hours

Good hours for

Low 33°1° tomorrow at 6 AM
Above 50°10° tomorrow by 11 AM
High 61°16° tomorrow at 3 PM
Below 50°10° tomorrow night after 8 PM

TonightDown to 34°1° by 5 AM · Clear
Tomorrow morningUp to 53°12° by 11 AM · Partly cloudy
Tomorrow afternoonUp to 61°16° by 3 PM · Clear
Tomorrow nightDown to 35°2° by 5 AM · Clear
Sunday morningUp to 55°13° by 11 AM · Clear
Sunday afternoonUp to 64°18° by 3 PM · Clear

Hourly forecast, next 44 hours, in the place's local time
Hour	Conditions	Temperature	Feels like	Precipitation	Wind	Humidity	Cloud cover	UV index
Fri 8p	Mostly clear	47°8° (likely 47°8° to 50°10°)	47°8°	0%	0 mph0 km/h, gusts 5 mph7 km/h	65%	9%	0
Fri 9p	Partly cloudy	44°7° (likely 44°7° to 49°9°)	44°7°	0%	0 mph0 km/h, gusts 5 mph7 km/h	73%	42%	0
Fri 10p	Partly cloudy	41°5° (likely 41°5° to 47°8°)	41°5°	0%	0 mph0 km/h, gusts 7 mph11 km/h	79%	37%	0
Fri 11p	Partly cloudy	39°4° (likely 39°4° to 45°7°)	39°4°	0%	0 mph0 km/h, gusts 6 mph10 km/h	85%	31%	0
Sat 12a	Clear	39°4° (likely 39°4° to 44°7°)	39°4°	0%	0 mph0 km/h, gusts 6 mph9 km/h	85%	11%	0
Sat 1a	Clear	38°3° (likely 38°3° to 43°6°)	38°3°	0%	0 mph0 km/h, gusts 5 mph8 km/h	89%	8%	0
Sat 2a	Clear	37°3° (likely 37°3° to 42°6°)	37°3°	0%	0 mph0 km/h, gusts 3 mph5 km/h	92%	3%	0
Sat 3a	Clear	35°2° (likely 35°2° to 41°5°)	35°2°	0%	0 mph0 km/h, gusts 2 mph4 km/h	100%	7%	0
Sat 4a	Partly cloudy	35°2° (likely 35°2° to 40°4°)	35°2°	0%	0 mph0 km/h, gusts 2 mph3 km/h	100%	35%	0
Sat 5a	Mostly clear	34°1° (likely 34°1° to 39°4°)	34°1°	0%	0 mph0 km/h, gusts 2 mph3 km/h	100%	39%	0
Sat 6a	Clear	33°1° (likely 33°1° to 39°4°)	33°1°	0%	0 mph0 km/h, gusts 3 mph5 km/h	100%	30%	0
Sat 7a	Mostly sunny	34°1° (likely 34°1° to 38°3°)	34°1°	0%	0 mph0 km/h, gusts 4 mph6 km/h	100%	21%	0
Sat 8a	Mostly sunny	35°2° (likely 35°2° to 39°4°)	32°0°	0%	5 mph8 km/h from N, gusts 4 mph6 km/h	96%	43%	0
Sat 9a	Sunny	40°4° (likely 40°4° to 44°7°)	40°4°	0%	0 mph0 km/h, gusts 4 mph6 km/h	82%	50%	1
Sat 10a	Sunny	49°9° (likely 49°9° to 50°10°)	48°9°	0%	5 mph8 km/h from NE, gusts 4 mph6 km/h	63%	42%	2
Sat 11a	Sunny	53°12° (likely 53°12° to 56°13°)	53°12°	0%	0 mph0 km/h, gusts 5 mph8 km/h	57%	28%	3
Sat 12p	Sunny	56°13° (likely 56°13° to 58°14°)	56°13°	0%	5 mph8 km/h from E, gusts 5 mph9 km/h	49%	10%	4
Sat 1p	Sunny	59°15° (likely 57°14° to 60°16°)	59°15°	0%	0 mph0 km/h, gusts 5 mph9 km/h	44%	8%	4
Sat 2p	Sunny	60°16° (likely 58°14° to 61°16°)	60°16°	0%	0 mph0 km/h, gusts 4 mph7 km/h	42%	4%	4
Sat 3p	Sunny	61°16° (likely 59°15° to 62°17°)	61°16°	0%	0 mph0 km/h, gusts 4 mph7 km/h	41%	2%	3
Sat 4p	Sunny	61°16° (likely 59°15° to 61°16°)	61°16°	0%	0 mph0 km/h, gusts 4 mph6 km/h	39%	1%	2
Sat 5p	Sunny	60°16° (likely 58°14° to 60°16°)	60°16°	0%	0 mph0 km/h, gusts 5 mph7 km/h	41%	1%	1
Sat 6p	Clear	57°14° (likely 53°12° to 57°14°)	57°14°	0%	0 mph0 km/h, gusts 5 mph7 km/h	47%	0%	0
Sat 7p	Clear	53°12° (likely 50°10° to 53°12°)	53°12°	0%	0 mph0 km/h, gusts 5 mph7 km/h	54%	0%	0
Sat 8p	Clear	47°8° (likely 47°8° to 50°10°)	47°8°	0%	0 mph0 km/h, gusts 4 mph6 km/h	68%	0%	0
Sat 9p	Clear	45°7° (likely 45°7° to 49°9°)	45°7°	0%	0 mph0 km/h, gusts 3 mph4 km/h	76%	0%	0
Sat 10p	Clear	43°6° (likely 43°6° to 48°9°)	43°6°	0%	0 mph0 km/h, gusts 3 mph5 km/h	82%	0%	0
Sat 11p	Clear	41°5° (likely 41°5° to 46°8°)	41°5°	0%	0 mph0 km/h, gusts 4 mph6 km/h	89%	0%	0
Sun 12a	Clear	40°4° (likely 40°4° to 45°7°)	40°4°	0%	0 mph0 km/h, gusts 4 mph6 km/h	92%	0%	0
Sun 1a	Clear	39°4° (likely 39°4° to 44°7°)	39°4°	0%	0 mph0 km/h, gusts 4 mph7 km/h	96%	0%	0
Sun 2a	Clear	38°3° (likely 38°3° to 43°6°)	38°3°	0%	0 mph0 km/h, gusts 4 mph6 km/h	100%	0%	0
Sun 3a	Clear	37°3° (likely 37°3° to 42°6°)	37°3°	0%	0 mph0 km/h, gusts 3 mph5 km/h	100%	0%	0
Sun 4a	Clear	36°2° (likely 36°2° to 42°6°)	36°2°	0%	0 mph0 km/h, gusts 3 mph4 km/h	100%	0%	0
Sun 5a	Clear	35°2° (likely 35°2° to 41°5°)	35°2°	0%	0 mph0 km/h, gusts 3 mph5 km/h	100%	0%	0
Sun 6a	Clear	34°1° (likely 34°1° to 40°4°)	34°1°	0%	0 mph0 km/h, gusts 2 mph4 km/h	100%	0%	0
Sun 7a	Sunny	34°1° (likely 34°1° to 40°4°)	34°1°	0%	0 mph0 km/h, gusts 3 mph4 km/h	100%	0%	0
Sun 8a	Sunny	36°2° (likely 35°2° to 40°4°)	36°2°	0%	0 mph0 km/h, gusts 2 mph4 km/h	100%	0%	0
Sun 9a	Sunny	42°6° (likely 40°4° to 45°7°)	42°6°	0%	0 mph0 km/h, gusts 3 mph5 km/h	89%	0%	1
Sun 10a	Sunny	49°9° (likely 49°9° to 52°11°)	49°9°	0%	0 mph0 km/h, gusts 2 mph4 km/h	71%	1%	2
Sun 11a	Sunny	55°13° (likely 55°13° to 59°15°)	55°13°	0%	0 mph0 km/h, gusts 5 mph8 km/h	61%	2%	3
Sun 12p	Sunny	59°15° (likely 57°14° to 61°16°)	59°15°	0%	0 mph0 km/h, gusts 5 mph8 km/h	51%	1%	4
Sun 1p	Sunny	61°16° (likely 59°15° to 63°17°)	61°16°	0%	0 mph0 km/h, gusts 5 mph8 km/h	48%	2%	4
Sun 2p	Sunny	62°17° (likely 60°16° to 64°18°)	62°17°	0%	0 mph0 km/h, gusts 5 mph8 km/h	46%	1%	4
Sun 3p	Sunny	64°18° (likely 61°16° to 65°18°)	64°18°	0%	0 mph0 km/h, gusts 5 mph8 km/h	43%	0%	3

Days ahead

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

Today, Oct 23. Partly sunny. High 60°16°, low 33°1°. Typical 65°18° / 41°5°. Dry. Forecasts agree.
1. Evening
  6 PM–midnight
  Partly cloudy, 47°8°
  Dry
2. Overnight
  midnight–6 AM
  Clear, 34°1°
  Dry
Official NWS forecast
Today: Sunny, with a high near 60. Northeast wind around 5 mph.
Tonight: Areas of frost after 2am. Mostly clear, with a low around 33. Northeast wind 0 to 5 mph.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
59°15°–61°16°
Low, likely
33°1°–45°7°
Typical high / low
65°18° / 41°5°
Wind
11 mph18 km/h, gusts 24 mph38 km/h
UV peak
4
Tomorrow, Oct 24. Cloudy. High 61°16°, low 34°1°. Typical 64°18° / 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, 47°8°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 35°2°
  Dry
Official NWS forecast
Day: Areas of frost before 9am. Sunny, with a high near 61. Northeast wind 0 to 5 mph.
Night: Clear, with a low around 34. Northwest wind around 0 mph.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
59°15°–62°17°
Low, likely
34°1°–38°3°
Typical high / low
64°18° / 41°5°
Wind
5 mph8 km/h, gusts 11 mph17 km/h
UV peak
4
Sunday, Oct 25. Sunny. High 64°18°, low 39°4°. Typical 64°18° / 41°5°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 36°2°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 64°18°
  Dry
3. Evening
  6 PM–midnight
  Clear, 49°9°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 41°5°
  Dry
Official NWS forecast
Day: Patchy frost before 8am. Sunny, with a high near 64. Northwest wind around 0 mph.
Night: Clear, with a low around 39.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
62°17°–64°18°
Low, likely
34°1°–39°4°
Typical high / low
64°18° / 41°5°
Wind
6 mph9 km/h, gusts 12 mph19 km/h
UV peak
4
Monday, Oct 26. Sunny. High 67°19°, low 46°8°. Typical 64°18° / 40°4°. Dry. Forecasts agree.
1. Morning
  6 AM–noon
  Sunny, 41°5°
  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 67.
Night: Mostly clear, with a low around 46.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
65°18°–68°20°
Low, likely
36°2°–46°8°
Typical high / low
64°18° / 40°4°
Wind
8 mph13 km/h, gusts 18 mph29 km/h
UV peak
4
Tuesday, Oct 27. Mostly sunny. High 65°18°, low 42°6°. 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, 40°4°
  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 42.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
60°16°–65°18°
Low, likely
42°6°–47°8°
Typical high / low
63°17° / 40°4°
Wind
11 mph18 km/h, gusts 26 mph41 km/h
UV peak
4
Wednesday, Oct 28. Cloudy. High 62°17°, low 46°8°. Typical 63°17° / 40°4°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Mostly sunny, 40°4°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 60°15°
  Dry
3. Evening
  6 PM–midnight
  Partly cloudy, 52°11°
  Dry
4. Overnight
  midnight–6 AM
  Partly cloudy, 44°7°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Partly sunny, with a high near 62.
Night: Mostly cloudy, with a low around 46.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
57°14°–62°17°
Low, likely
38°3°–46°8°
Typical high / low
63°17° / 40°4°
Wind
7 mph12 km/h, gusts 17 mph27 km/h
UV peak
4
Thursday, Oct 29. Partly sunny. High 67°19°, low 49°9°. Typical 62°17° / 39°4°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Sunny, 45°7°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 65°18°
  Dry
3. Evening
  6 PM–midnight
  Clear, 55°13°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 50°10°
  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 49.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
62°17°–68°20°
Low, likely
42°6°–49°9°
Typical high / low
62°17° / 39°4°
Wind
11 mph17 km/h, gusts 31 mph50 km/h
UV peak
4
Friday, Oct 30. Sunny. High 69°21°, low 48°9°. Typical 62°17° / 39°4°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Sunny, 49°9°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 67°19°
  Dry
3. Evening
  6 PM–midnight
  Clear, 55°13°
  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
65°18°–72°22°
Low, likely
46°8°–50°10°
Typical high / low
62°17° / 39°4°
Wind
9 mph14 km/h, gusts 19 mph31 km/h
UV peak
4
Saturday, Oct 31. Sunny. High 67°19°, low 46°8°. Typical 62°17° / 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
  Mostly 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
64°18°–70°21°
Low, likely
40°4°–50°10°
Typical high / low
62°17° / 39°4°
Wind
11 mph18 km/h, gusts 21 mph34 km/h
UV peak
4
Sunday, Nov 1. Cloudy. High 65°18°, low 46°8°. Typical 61°16° / 38°3°. Rain 0.01 in0.3 mm, 20% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Sunny, 45°7°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 63°17°
  20% chance
3. Evening
  6 PM–midnight
  Cloudy, 57°14°
  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°–69°21°
Low, likely
42°6°–51°11°
Typical high / low
61°16° / 38°3°
Wind
8 mph13 km/h, gusts 22 mph35 km/h
UV peak
4

10 days15 days30 days

The outlook

Today
Dry, high 60°, low 33°.
Tomorrow
Dry, high 61°, low 34°.
Sunday
Dry, high 64°, low 39°, 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

Brandywine Creek at Chadds Ford

13 mi

Below flood stage

Level: 1.9 ft
Flow: 207 cfs

Forecast peak 1.9 ft Fri 8 PM

Reading from Fri 5:30 PM · NWS gauge page

Schuylkill River at Pottstown

13 mi

Below flood stage

Level: 2.1 ft
Flow: 918 cfs

Forecast peak 2.1 ft Fri 8 PM

Reading from Fri 5:15 PM · NWS gauge page

Perkiomen Creek at Graterford

16 mi

Below flood stage

Level: 1.1 ft
Flow: 104 cfs

Forecast peak 1.1 ft Fri 8 PM

Reading from Fri 6:15 PM · NWS gauge page

Schuylkill River at Norristown

16 mi

Below flood stage

Level: 8.1 ft
Flow: 1,330 cfs

Forecast peak 8.1 ft Fri 8 PM

Reading from Fri 5:30 PM · NWS gauge page

For your home

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

Heating this week

About 62% less heating than a typical week.

This week 35Typical 92

Heating degree days, base 65°F

Heat-pump hours, next 7 days

h below 47°F: 27
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 36°F).

Open the windows?

Sat, 2:00 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 23, today vs a typical year

Today’s expected high is 5°3° colder than typical.

Last 7 days vs normal

On average 2°1° colder than normal (daily mean temperature).

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

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

Sun & moon

Sun

Daylight: 10 h 50 min; Losing 2 min 25 s a day; shortest Dec 21, 1 h 30 min less
Golden hour: 5:33–6:28 PM; Morning 7:04–7:59 AM
Blue hour: 6:28–6:39 PM; Morning 6:54–7:04 AM; first light 6:54 AM

Stars tonight? Fair

Mostly clear 12–4 AM, but the moon is 95% lit and up.

Moon

Waxing gibbous

94% lit · growing

Today: sets 4:26 AM · rises 4:42 PM
Full moon: Oct 26
New moon: Nov 9

Looking northwest from Lionville. The highest point on the skyline is about 2,300 ft, 35 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

Lionville, PA weather

Next 2 hours

Next 48 hours

Days ahead

The outlook

Today

Tomorrow

Sunday

Rest of week

What changed since yesterday

Radar

Rivers

Brandywine Creek at Chadds Ford

Schuylkill River at Pottstown

Perkiomen Creek at Graterford

Schuylkill River at Norristown

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