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United States weather

Weather in Pennsylvania for December 2026

Your guide to Pennsylvania weather in December - trends and predictions

    Snow Forecast ❄️

  • Snowfall in Pennsylvania during December is quite rare, with fewer than 2 snowy days on average.

    • Temperatures

  • In general, the average temperature in Pennsylvania at the beginning of December is 7.4 °C. As the month progressed, temperatures tended to moderately fall, reaching an average of 6.7 °C by the end of December.

    • Rain 🌧️

  • Pennsylvania experiences moderate rainfall in December, with an average of 9 rainy days and a total precipitation of 155.5 mm.

    • More

  • Is December a good time to visit Pennsylvania? check out the best time to travel to Pennsylvania page.

  • ✨ Is December a good time to visit Pennsylvania? – Ask the AI Weatherman

Average dry days
21
Dry days
Average rainy days
9
Rainy days
Average snowy days
1
Snow days
Average temperatures
7°/1°
Temperatures
Average wind speed
17 km/h
Avg max wind
Average humidity
72 %
Avg humidity

Pennsylvania Weather December

Move between months or click on a day
November
January
Sun.Mon.Tue.Wed.Thu.Fri.Sat.
1
Overcast
6°
2
Moderate rain
8°
3
Light rain
10°
4
Cloudy
7°
5
Light rain
6°
6
Light rain
9°
7
Partly cloudy
6°
8
Overcast
7°
9
Light rain
6°
10
Light rain
10°
11
Moderate rain
10°
12
Overcast
7°
13
Partly cloudy
7°
14
Light snow
6°
15
Light rain
6°
16
Light snow
8°
17
Light snow
8°
18
Moderate rain
8°
19
Light rain
6°
20
Patchy rain possible
4°
21
Sunny
5°
22
Light rain
5°
23
Patchy rain possible
5°
24
Light rain
5°
25
Light rain
7°
26
Partly cloudy
3°
27
Light snow
4°
28
Light rain
7°
29
Patchy rain possible
10°
30
Light rain
8°
31
Light rain
8°

What’s the Weather Like in Pennsylvania This December?

Discover the average temperatures and weather trends across Pennsylvania’s cities this December.
CloudyPhiladelphia7 °C / 1 °CCloudyPittsburgh4 °C / -1 °CCloudyHarrisburg4 °C / -2 °CCloudyWilkes-Barre1 °C / -5 °CCloudyAllentown2 °C / -3 °CCloudyLancaster3 °C / -3 °CCloudyAltoona1 °C / -4 °CCloudyScranton0 °C / -5 °CCloudyWilliamsport1 °C / -3 °CCloudyErie2 °C / -1 °CCloudyEaston2 °C / -4 °CCloudyHershey3 °C / -3 °CMore Locations

Temperatures trend during December in Pennsylvania

See the weather trend as well as the moving average line

December weather in Pennsylvania day by day

Click on a date for more information
November January
Date Weather Temperatures Rain Snow More
Dec. 1 Overcast
Overcast
 6° /0° 0.4 mm 0 cm
Dec. 2 Moderate rain
Moderate rain
 8° /2° 19.3 mm 0 cm
Dec. 3 Light rain
Light rain
 10° /3° 8.5 mm 0 cm
Dec. 4 Cloudy
Cloudy
 7° /1° 0 mm 0 cm
Dec. 5 Light rain
Light rain
 6° /-1° 2.6 mm 0.4 cm
Dec. 6 Light rain
Light rain
 9° /1° 2.5 mm 0 cm
Dec. 7 Partly cloudy
Partly cloudy
 6° /1° 0.6 mm 0 cm
Dec. 8 Overcast
Overcast
 7° /1° 0 mm 0 cm
Dec. 9 Light rain
Light rain
 6° /-1° 4.7 mm 0 cm
Dec. 10 Light rain
Light rain
 10° /1° 7.1 mm 0 cm
Dec. 11 Moderate rain
Moderate rain
 10° /3° 20.5 mm 0 cm
Dec. 12 Overcast
Overcast
 7° /1° 0.8 mm 0 cm
Dec. 13 Partly cloudy
Partly cloudy
 7° /1° 0.1 mm 0 cm
Dec. 14 Light snow
Light snow
 6° /-1° 6.3 mm 2.4 cm
Dec. 15 Light rain
Light rain
 6° /-1° 4.2 mm 0 cm
Dec. 16 Light snow
Light snow
 8° /2° 7.3 mm 2.1 cm
Dec. 17 Light snow
Light snow
 8° /3° 6.8 mm 1.1 cm
Dec. 18 Moderate rain
Moderate rain
 8° /1° 11 mm 0 cm
Dec. 19 Light rain
Light rain
 6° /-1° 7.3 mm 0 cm
Dec. 20 Patchy rain possible
Patchy rain possible
 4° /-2° 1.2 mm 0 cm
Dec. 21 Sunny
Sunny
 5° /-1° 0.8 mm 0.3 cm
Dec. 22 Light rain
Light rain
 5° /-2° 2.7 mm 0 cm
Dec. 23 Patchy rain possible
Patchy rain possible
 5° /-2° 1.8 mm 0 cm
Dec. 24 Light rain
Light rain
 5° /0° 3.6 mm 0.2 cm
Dec. 25 Light rain
Light rain
 7° /0° 4.8 mm 0 cm
Dec. 26 Partly cloudy
Partly cloudy
 3° /-2° 0.3 mm 0.2 cm
Dec. 27 Light snow
Light snow
 4° /-1° 9.5 mm 2.4 cm
Dec. 28 Light rain
Light rain
 7° /1° 9.5 mm 0 cm
Dec. 29 Patchy rain possible
Patchy rain possible
 10° /3° 2.2 mm 0 cm
Dec. 30 Light rain
Light rain
 8° /3° 6.5 mm 0 cm
Dec. 31 Light rain
Light rain
 8° /2° 2.7 mm 0 cm
Next
Important Notice
Our weather forecast for Pennsylvania in December is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Pennsylvania forecast closer to your planned date for the most up-to-date weather information.
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Pennsylvania in December - FAQ

What are the expected maximum and minimum temperatures in Pennsylvania during December?
Prepare for cooler days with highs just around 7° and colder nights, dipping below 1°.

How much rainfall should be expected in Pennsylvania during December?
Significant rainfall exceeding 155.5 mm is expected in Pennsylvania during December, occurring over more than 9 days. Preparing for wet conditions is recommended in your planning.

Will it snow in Pennsylvania in December 2026?
Pennsylvania typically sees 9.1 cm of snowfall during December.

What are the typical wind conditions in Pennsylvania during December?
The average wind speed in Pennsylvania during December is 17 km/h, suggesting breezy to windy conditions, depending on your activities.

Pennsylvania snow forecast December 2026

Track daily snowfall levels and discover Pennsylvania’s snowy potential this December ❄️
On average, Pennsylvania sees 1 snowy days during December, with approximately 9.1 cm of total snowfall.

December rainfall patterns in Pennsylvania

Explore the daily rainfall trends and prepare for Pennsylvanias December weather 💧
Typically, Pennsylvania has 9 rainy days in December with a total of 155.5 mm of rainfall.
Counties in Pennsylvania
Select a county for an accurate weather forecast
Allegheny CountyBerks CountyBlair CountyCambria CountyCentre CountyDauphin CountyDelaware CountyErie CountyLackawanna CountyLancaster CountyLawrence CountyLehigh CountyLuzerne CountyLycoming CountyMcKean CountyMonroe CountyNorthampton CountyPhiladelphia CountyWyoming County
Top locations in Pennsylvania
Select a location for an accurate weather forecast
AllentownAltoonaErieHarrisburgLancasterPhiladelphiaPittsburghScrantonWilkes-BarreWilliamsport
More Locations
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