Pennsylvania (Philadelphia)
December
Weather in Pennsylvania for December 2025
Your guide to Pennsylvania weather in December - trends and predictions
With an average of 2 snowy days, Pennsylvania usually enjoys a light touch of snow in December.
In general, the average temperature in Pennsylvania at the beginning of December is 8.9 °F. As the month progressed, temperatures tended to moderately fall, reaching an average of 8.1 °F by the end of December.
Pennsylvania in December brings notable rainfall, with an average of 19 rainy days and a total precipitation of 136 mm.
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Snow Forecast ❄️
Temperatures
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10
Dry days
19
Rainy days
2
Snow days
8°/1°
Temperatures
17 km/h
Avg max wind
68 %
Avg humidity
Pennsylvania in December average weather
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| Sun. | Mon. | Tue. | Wed. | Thu. | Fri. | Sat. |
|---|---|---|---|---|---|---|
| 1  7° | 2  10° | 3  12° | 4  8° | 5 7° | 6 11° | |
| 7 7° | 8 9° | 9 8° | 10 11° | 11 13° | 12  8° | 13 8° |
| 14 7° | 15 7° | 16  9° | 17  9° | 18 8° | 19 6° | 20 5° |
| 21 5° | 22 6° | 23 6° | 24  6° | 25 8° | 26 5° | 27 5° |
| 28 9° | 29 10° | 30 10° | 31 10° |
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Temperatures trend during December in Pennsylvania
See the weather trend as well as the moving average line
December weather day by day
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| Date | Weather | Temperatures | Rain | Snow | More |
|---|---|---|---|---|---|
| Dec. 1 | Overcast | 7° /0° | 0.5 mm | 0 cm | |
| Dec. 2 | Sunny | 10° /2° | 0.3 mm | 0 cm | |
| Dec. 3 | Partly cloudy | 12° /3° | 10.7 mm | 0 cm | |
| Dec. 4 | Cloudy | 8° /1° | 0 mm | 0 cm | |
| Dec. 5 | Partly cloudy | 7° /0° | 2.6 mm | 0 cm | |
| Dec. 6 | Overcast | 11° /1° | 3.1 mm | 0 cm | |
| Dec. 7 | Partly cloudy | 7° /2° | 0.8 mm | 0 cm | |
| Dec. 8 | Overcast | 9° /2° | 0.1 mm | 0 cm | |
| Dec. 9 | Overcast | 8° /1° | 5.9 mm | 0 cm | |
| Dec. 10 | Overcast | 11° /1° | 8.9 mm | 0 cm | |
| Dec. 11 | Overcast | 13° /4° | 25.7 mm | 0 cm | |
| Dec. 12 | Patchy rain possible | 8° /2° | 0.9 mm | 0 cm | |
| Dec. 13 | Partly cloudy | 8° /1° | 0.2 mm | 0 cm | |
| Dec. 14 | Sunny | 7° /-1° | 3.3 mm | 0 cm | |
| Dec. 15 | Overcast | 7° /0° | 5.1 mm | 0 cm | |
| Dec. 16 | Moderate or heavy snow showers | 9° /3° | 8.8 mm | 2.5 cm | |
| Dec. 17 | Moderate snow | 9° /4° | 8.2 mm | 1.3 cm | |
| Dec. 18 | Cloudy | 8° /1° | 13.2 mm | 0 cm | |
| Dec. 19 | Cloudy | 6° /-1° | 0.8 mm | 0 cm | |
| Dec. 20 | Sunny | 5° /-1° | 1.4 mm | 0 cm | |
| Dec. 21 | Sunny | 5° /-1° | 1 mm | 0.4 cm | |
| Dec. 22 | Overcast | 6° /-2° | 3.2 mm | 0 cm | |
| Dec. 23 | Partly cloudy | 6° /-3° | 2.1 mm | 0 cm | |
| Dec. 24 | Heavy rain at times | 6° /-1° | 4.3 mm | 0.2 cm | |
| Dec. 25 | Partly cloudy | 8° /0° | 5.8 mm | 0 cm | |
| Dec. 26 | Partly cloudy | 5° /-2° | 0 mm | 0 cm | |
| Dec. 27 | Cloudy | 5° /-1° | 6.8 mm | 0 cm | |
| Dec. 28 | Cloudy | 9° /2° | 11.4 mm | 0 cm | |
| Dec. 29 | Sunny | 10° /3° | 1.6 mm | 0 cm | |
| Dec. 30 | Partly cloudy | 10° /3° | 7.7 mm | 0 cm | |
| Dec. 31 | Heavy rain at times | 10° /3° | 3.2 mm | 0 cm | |
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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.
Pennsylvania in December - FAQ
What are the expected maximum and minimum temperatures in Pennsylvania during December?
Prepare for cooler days with highs just around 8° and colder nights, dipping below 1°.
How much rainfall should be expected in Pennsylvania during December?
Significant rainfall exceeding 136 mm is expected in Pennsylvania during December, occurring over more than 19 days. Preparing for wet conditions is recommended in your planning.
Will it snow in Pennsylvania in December 2025?
Pennsylvania experiences an average snowfall of 4.845 cm during December, occurring over 2 days.
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 2025
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December rainfall patterns in Pennsylvania
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