Freeze Warning
Starts in 7 h 26 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 expected.
Impacts
Frost and freeze conditions could kill crops, other sensitive vegetation.
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 4:15 PM EDT at KRDG

Shartlesville, PA weather

Freeze Warning. 61°16° and sunny now.

Forecasts agree

Now 61°16°

Sunny

Wind: 5 mph7 km/h; From the north-northeast. Up to 5 mph8 km/h through 4 AM
Dew point: 28°−2°; Dry, static shocks likely
UV tomorrow: 4Moderate; Moderate 11 AM–4 PM · peak 4
Pressure: 30.36 inHg1028 hPa; Rising slowly · +0.02 inHg+0.5 hPa in 3 h

No precipitation expected in the next 2 hours.

From forecast models

Next 48 hours

Good hours for

Below 50°10° tonight after 8 PM
Low 34°1° tomorrow at 6 AM
Above 50°10° tomorrow by 11 AM

This afternoonNear 59°15° · Clear
TonightDown to 35°2° by 3 AM · Partly cloudy
Tomorrow morningUp to 53°12° by 11 AM · Partly cloudy
Tomorrow afternoonUp to 61°16° by 4 PM · Clear
Tomorrow nightDown to 35°2° by 4 AM · Clear
Sunday morningUp to 55°13° by 11 AM · Clear

Hourly forecast, next 46 hours, in the place's local time
Hour	Conditions	Temperature	Feels like	Precipitation	Wind	Humidity	Cloud cover	UV index
Fri 4p	Sunny	59°15° (likely 58°14° to 60°16°)	59°15°	0%	5 mph8 km/h from E, gusts 9 mph15 km/h	37%	2%	1
Fri 5p	Sunny	59°15° (likely 57°14° to 59°15°)	59°15°	0%	5 mph8 km/h from E, gusts 10 mph16 km/h	37%	3%	0
Fri 6p	Partly cloudy	57°14° (likely 53°12° to 57°14°)	57°14°	0%	5 mph8 km/h from E, gusts 8 mph12 km/h	42%	47%	0
Fri 7p	Partly cloudy	52°11° (likely 49°9° to 52°11°)	52°11°	0%	5 mph8 km/h from E, gusts 5 mph8 km/h	50%	54%	0
Fri 8p	Partly cloudy	48°9° (likely 47°8° to 50°10°)	48°9°	0%	0 mph0 km/h, gusts 4 mph6 km/h	60%	72%	0
Fri 9p	Mostly cloudy	45°7° (likely 45°7° to 49°9°)	45°7°	0%	0 mph0 km/h, gusts 4 mph7 km/h	65%	66%	0
Fri 10p	Partly cloudy	42°6° (likely 42°6° to 48°9°)	42°6°	0%	0 mph0 km/h, gusts 5 mph7 km/h	70%	40%	0
Fri 11p	Clear	40°4° (likely 40°4° to 47°8°)	40°4°	0%	0 mph0 km/h, gusts 4 mph6 km/h	76%	41%	0
Sat 12a	Clear	39°4° (likely 39°4° to 46°8°)	39°4°	0%	0 mph0 km/h, gusts 3 mph5 km/h	79%	39%	0
Sat 1a	Clear	38°3° (likely 38°3° to 46°8°)	38°3°	0%	0 mph0 km/h, gusts 2 mph4 km/h	82%	36%	0
Sat 2a	Partly cloudy	37°3° (likely 37°3° to 44°7°)	37°3°	0%	0 mph0 km/h, gusts 3 mph5 km/h	85%	31%	0
Sat 3a	Clear	35°2° (likely 35°2° to 43°6°)	35°2°	0%	0 mph0 km/h, gusts 3 mph4 km/h	92%	43%	0
Sat 4a	Mostly clear	35°2° (likely 35°2° to 43°6°)	35°2°	0%	0 mph0 km/h, gusts 2 mph4 km/h	89%	36%	0
Sat 5a	Mostly clear	35°2° (likely 35°2° to 42°6°)	35°2°	0%	0 mph0 km/h, gusts 3 mph4 km/h	89%	59%	0
Sat 6a	Mostly clear	34°1° (likely 34°1° to 42°6°)	34°1°	0%	0 mph0 km/h, gusts 3 mph5 km/h	92%	55%	0
Sat 7a	Cloudy	35°2° (likely 35°2° to 42°6°)	35°2°	0%	0 mph0 km/h, gusts 3 mph5 km/h	89%	62%	0
Sat 8a	Sunny	36°2° (likely 36°2° to 42°6°)	36°2°	0%	0 mph0 km/h, gusts 2 mph4 km/h	82%	45%	0
Sat 9a	Sunny	41°5° (likely 40°4° to 45°7°)	41°5°	0%	0 mph0 km/h, gusts 3 mph6 km/h	76%	34%	1
Sat 10a	Sunny	49°9° (likely 48°9° to 49°9°)	49°9°	0%	0 mph0 km/h, gusts 3 mph5 km/h	61%	18%	2
Sat 11a	Sunny	53°12° (likely 52°11° to 54°12°)	53°12°	0%	0 mph0 km/h, gusts 5 mph8 km/h	54%	1%	3
Sat 12p	Sunny	55°13° (likely 54°12° to 57°14°)	55°13°	0%	0 mph0 km/h, gusts 6 mph9 km/h	53%	1%	4
Sat 1p	Sunny	58°14° (likely 55°13° to 58°14°)	58°14°	0%	0 mph0 km/h, gusts 5 mph8 km/h	47%	1%	4
Sat 2p	Sunny	59°15° (likely 57°14° to 59°15°)	59°15°	0%	0 mph0 km/h, gusts 5 mph8 km/h	44%	1%	4
Sat 3p	Sunny	60°16° (likely 57°14° to 60°16°)	60°16°	0%	0 mph0 km/h, gusts 4 mph7 km/h	42%	1%	3
Sat 4p	Sunny	61°16° (likely 58°14° to 61°16°)	61°16°	0%	0 mph0 km/h, gusts 4 mph7 km/h	41%	1%	2
Sat 5p	Sunny	59°15° (likely 57°14° to 59°15°)	59°15°	0%	0 mph0 km/h, gusts 4 mph6 km/h	44%	1%	1
Sat 6p	Clear	57°14° (likely 52°11° to 57°14°)	57°14°	0%	0 mph0 km/h, gusts 4 mph7 km/h	47%	0%	0
Sat 7p	Clear	53°12° (likely 49°9° to 53°12°)	53°12°	0%	0 mph0 km/h, gusts 4 mph7 km/h	54%	0%	0
Sat 8p	Clear	47°8° (likely 47°8° to 48°9°)	47°8°	0%	0 mph0 km/h, gusts 2 mph3 km/h	65%	0%	0
Sat 9p	Clear	45°7° (likely 45°7° to 48°9°)	45°7°	0%	0 mph0 km/h, gusts 3 mph4 km/h	70%	0%	0
Sat 10p	Clear	43°6° (likely 43°6° to 47°8°)	43°6°	0%	0 mph0 km/h, gusts 3 mph4 km/h	73%	0%	0
Sat 11p	Clear	41°5° (likely 41°5° to 46°8°)	41°5°	0%	0 mph0 km/h, gusts 3 mph4 km/h	82%	0%	0
Sun 12a	Clear	39°4° (likely 39°4° to 45°7°)	39°4°	0%	0 mph0 km/h, gusts 3 mph4 km/h	89%	0%	0
Sun 1a	Clear	38°3° (likely 38°3° to 44°7°)	38°3°	0%	0 mph0 km/h, gusts 2 mph4 km/h	92%	0%	0
Sun 2a	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 3a	Clear	36°2° (likely 36°2° to 44°7°)	36°2°	0%	0 mph0 km/h, gusts 2 mph4 km/h	96%	0%	0
Sun 4a	Clear	35°2° (likely 35°2° to 43°6°)	35°2°	0%	0 mph0 km/h, gusts 3 mph4 km/h	100%	0%	0
Sun 5a	Clear	35°2° (likely 35°2° to 43°6°)	35°2°	0%	0 mph0 km/h, gusts 2 mph4 km/h	100%	0%	0
Sun 6a	Clear	34°1° (likely 34°1° to 42°6°)	34°1°	0%	0 mph0 km/h, gusts 2 mph3 km/h	100%	0%	0
Sun 7a	Sunny	34°1° (likely 34°1° to 41°5°)	34°1°	0%	0 mph0 km/h, gusts 2 mph4 km/h	100%	1%	0
Sun 8a	Sunny	36°2° (likely 34°1° to 41°5°)	36°2°	0%	0 mph0 km/h, gusts 2 mph4 km/h	100%	0%	0
Sun 9a	Sunny	42°6° (likely 34°1° to 45°7°)	42°6°	0%	0 mph0 km/h, gusts 2 mph4 km/h	89%	1%	1
Sun 10a	Sunny	49°9° (likely 41°5° to 50°10°)	49°9°	0%	0 mph0 km/h, gusts 3 mph5 km/h	71%	0%	2
Sun 11a	Sunny	55°13° (likely 48°9° to 56°13°)	55°13°	0%	0 mph0 km/h, gusts 4 mph7 km/h	64%	0%	3
Sun 12p	Sunny	58°14° (likely 55°13° to 59°15°)	58°14°	0%	0 mph0 km/h, gusts 6 mph10 km/h	55%	0%	4
Sun 1p	Sunny	60°16° (likely 58°14° to 61°16°)	60°16°	0%	0 mph0 km/h, gusts 7 mph12 km/h	51%	0%	4

Days ahead

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

Today, Oct 23. Cloudy. High 60°16°, low 34°1°. Typical 63°17° / 42°6°. Dry. Forecasts agree.
1. Afternoon
  noon–6 PM
  Sunny, 59°15°
  Dry
2. Evening
  6 PM–midnight
  Mostly cloudy, 48°9°
  Dry
3. Overnight
  midnight–6 AM
  Clear, 35°2°
  Dry
Official NWS forecast
Today: Sunny, with a high near 60. East wind around 5 mph.
Tonight: Patchy frost after 2am. Partly cloudy, with a low around 34. Northeast wind 0 to 5 mph.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
58°14°–60°16°
Low, likely
34°1°–47°8°
Typical high / low
63°17° / 42°6°
Wind
18 mph29 km/h, gusts 30 mph48 km/h
UV peak
4
Tomorrow, Oct 24. Mostly sunny. High 61°16°, low 34°1°. Typical 62°17° / 42°6°. Dry. Forecasts agree.
1. Morning
  6 AM–noon
  Sunny, 36°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. East wind around 0 mph.
Night: Patchy frost after 4am. Clear, with a low around 34. Northwest wind around 0 mph.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
58°14°–61°16°
Low, likely
34°1°–42°6°
Typical high / low
62°17° / 42°6°
Wind
5 mph8 km/h
UV peak
4
Sunday, Oct 25. Sunny. High 63°17°, low 38°3°. Typical 62°17° / 42°6°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 36°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, 38°3°
  Dry
Official NWS forecast
Day: Patchy frost before 8am. Sunny, with a high near 63. Northwest wind around 0 mph.
Night: Clear, with a low around 38.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
60°16°–63°17°
Low, likely
33°1°–39°4°
Typical high / low
62°17° / 42°6°
Wind
7 mph10 km/h
UV peak
4
Monday, Oct 26. Sunny. High 68°20°, low 45°7°. Typical 62°17° / 41°5°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 37°3°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 66°19°
  Dry
3. Evening
  6 PM–midnight
  Clear, 52°11°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 46°8°
  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 45.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
65°18°–68°20°
Low, likely
32°0°–45°7°
Typical high / low
62°17° / 41°5°
Wind
9 mph14 km/h, gusts 16 mph26 km/h
UV peak
4
Tuesday, Oct 27. Mostly sunny. High 64°18°, low 41°5°. Typical 61°16° / 41°5°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 44°7°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 62°17°
  Dry
3. Evening
  6 PM–midnight
  Clear, 50°10°
  Dry
4. Overnight
  midnight–6 AM
  Mostly clear, 40°4°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Sunny, with a high near 64.
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
61°16° / 41°5°
Wind
9 mph14 km/h, gusts 18 mph29 km/h
UV peak
4
Wednesday, Oct 28. Cloudy. High 61°16°, low 45°7°. Typical 61°16° / 41°5°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Partly sunny, 40°4°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 58°14°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 50°10°
  Dry
4. Overnight
  midnight–6 AM
  Partly cloudy, 45°7°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Mostly sunny, with a high near 61.
Night: Mostly cloudy, with a low around 45.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
56°13°–62°17°
Low, likely
38°3°–45°7°
Typical high / low
61°16° / 41°5°
Wind
6 mph10 km/h, gusts 16 mph26 km/h
UV peak
3
Thursday, Oct 29. Cloudy. High 67°19°, low 48°9°. Typical 61°16° / 40°4°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Sunny, 45°7°
  Dry
2. Afternoon
  noon–6 PM
  Partly sunny, 65°18°
  Dry
3. Evening
  6 PM–midnight
  Clear, 55°13°
  Dry
4. Overnight
  midnight–6 AM
  Mostly clear, 46°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.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
63°17°–68°20°
Low, likely
41°5°–48°9°
Typical high / low
61°16° / 40°4°
Wind
10 mph16 km/h, gusts 25 mph40 km/h
UV peak
4
Friday, Oct 30. Cloudy. High 67°19°, low 45°7°. Typical 60°16° / 40°4°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Mostly sunny, 44°7°
  Dry
2. Afternoon
  noon–6 PM
  Mostly sunny, 65°18°
  Dry
3. Evening
  6 PM–midnight
  Clear, 52°11°
  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.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
62°17°–70°21°
Low, likely
42°6°–50°10°
Typical high / low
60°16° / 40°4°
Wind
7 mph11 km/h, gusts 17 mph27 km/h
UV peak
4
Saturday, Oct 31. Cloudy. High 62°17°, low 43°6°. Typical 60°16° / 40°4°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Sunny, 44°7°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 60°16°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 50°10°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 42°6°
  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
40°4°–48°9°
Typical high / low
60°16° / 40°4°
Wind
9 mph15 km/h, gusts 22 mph35 km/h
UV peak
3
Sunday, Nov 1. Cloudy. High 60°16°, low 43°6°. Typical 59°15° / 40°4°. Rain 0.06 in1.5 mm, 30% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Cloudy, 42°5°
  Dry
2. Afternoon
  noon–6 PM
  Partly sunny, 58°14°
  30% chance · 0.03 in0.8 mm
3. Evening
  6 PM–midnight
  Fog, 53°12°
  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
56°13°–65°18°
Low, likely
33°1°–50°10°
Typical high / low
59°15° / 40°4°
Wind
8 mph13 km/h, gusts 26 mph42 km/h
UV peak
1

10 days15 days30 days

The outlook

Today
Dry, high 60°, low 34°.
Tomorrow
Dry, high 61°, low 34°.
Sunday
Dry, high 63°, low 38°.
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

Schuylkill River at Berne

5.4 mi

Below flood stage

Level: 5.1 ft
Flow: 276 cfs

Forecast peak 5.1 ft Fri 8 PM

Reading from Fri 2 PM · NWS gauge page

Schuylkill River at Reading

15 mi

Below flood stage

Level: 3.5 ft
Flow: 781 cfs

Forecast peak 3.5 ft Fri 8 PM

Reading from Fri 2:15 PM · NWS gauge page

Schuylkill River at Landingville

7.9 mi

Below flood stage

Level: 3.2 ft
Flow: 83 cfs

Reading from Fri 2:30 PM · NWS gauge page

Tulpehocken Creek at Blue Marsh Dam

10 mi

Below flood stage

Level: 287 ft

Reading from Fri 2 PM · NWS gauge page

For your home

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

Heating this week

About 61% less heating than a typical week.

This week 37Typical 95

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 19 hours are near freezing and damp, when outdoor units defrost more often.

Comfort

Dry air outside (dew point 28°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?

Reading Regional Airport · official normals 1991–2020 · records 1888–2026

Oct 23, today vs a typical year

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

Last 7 days vs normal

On average 3°2° colder than normal (daily mean temperature).

−6°−4°SatOct 17
−8°−4°SunOct 18
−2°−1°MonOct 19
+1°±0°TueOct 20
−1°WedOct 21
−1°ThuOct 22
—FriOct 23

Shartlesville 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: 5:34–6:29 PM; Morning 7:07–8:01 AM
Blue hour: 6:29–6:40 PM; Morning 6:56–7:07 AM; first light 6:56 AM

Stars tonight? Poor

Clouds most of the night (about 47% cover).

Moon

Waxing gibbous

93% lit · growing

Today: sets 4:28 AM · rises 4:44 PM
Full moon: Oct 26
New moon: Nov 9

Looking northwest from Shartlesville. The highest point on the skyline is about 1,700 ft, 8 mi away.Skyline from USGS elevation data, heights drawn up to 5× taller. Sky, sun and moon as they are now.

1 active weather alert

Freeze Warning

Shartlesville, PA weather

Next 2 hours

Next 48 hours

Days ahead

The outlook

Today

Tomorrow

Sunday

Rest of week

What changed since yesterday

Radar

Rivers

Schuylkill River at Berne

Schuylkill River at Reading

Schuylkill River at Landingville

Tulpehocken Creek at Blue Marsh Dam

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