Pennsylvania (Pittsburgh)
December
Weather in Pennsylvania for December 2025
Your guide to Pennsylvania weather in December - trends and predictions
Pennsylvania typically experiences moderate snowfall in December, with an average of 10 snowy days.
In general, the average temperature in Pennsylvania at the beginning of December is 3.7 °F. As the month progressed, temperatures tended to significantly warm up, reaching an average of 6.9 °F by the end of December.
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Snow Forecast ❄️
Temperatures
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9
Dry days
12
Rainy days
10
Snow days
5°/0°
Temperatures
16 km/h
Avg max wind
77 %
Avg humidity
Pennsylvania Weather December
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| Sun. | Mon. | Tue. | Wed. | Thu. | Fri. | Sat. |
|---|---|---|---|---|---|---|
| 1  4° | 2  7° | 3 6° | 4  3° | 5  2° | 6  1° | |
| 7 3° | 8  10° | 9 12° | 10  12° | 11 4° | 12  4° | 13 2° |
| 14 4° | 15 5° | 16 10° | 17 10° | 18 5° | 19 1° | 20 3° |
| 21  2° | 22 4° | 23  5° | 24  -0° | 25 3° | 26 4° | 27 5° |
| 28 10° | 29 10° | 30 8° | 31  8° |
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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 | Light rain | 4° /0° | 1.4 mm | 0 cm | |
| Dec. 2 | Patchy rain possible | 7° /1° | 0.1 mm | 0 cm | |
| Dec. 3 | Light rain shower | 6° /1° | 8.4 mm | 0 cm | |
| Dec. 4 | Overcast | 3° /0° | 0.7 mm | 0.5 cm | |
| Dec. 5 | Moderate or heavy snow showers | 2° /-2° | 1.5 mm | 1.2 cm | |
| Dec. 6 | Light snow showers | 1° /-2° | 0.3 mm | 0.2 cm | |
| Dec. 7 | Overcast | 3° /-2° | 0 mm | 0 cm | |
| Dec. 8 | Partly cloudy | 10° /1° | 0 mm | 0 cm | |
| Dec. 9 | Patchy rain possible | 12° /4° | 17 mm | 0 cm | |
| Dec. 10 | Moderate or heavy rain with thunder | 12° /4° | 46.9 mm | 0 cm | |
| Dec. 11 | Moderate or heavy snow showers | 4° /0° | 1.5 mm | 1.2 cm | |
| Dec. 12 | Sunny | 4° /-3° | 0 mm | 0 cm | |
| Dec. 13 | Partly cloudy | 2° /-3° | 0 mm | 0 cm | |
| Dec. 14 | Sunny | 4° /-4° | 0 mm | 0 cm | |
| Dec. 15 | Sunny | 5° /-2° | 13.9 mm | 0 cm | |
| Dec. 16 | Sunny | 10° /1° | 33.6 mm | 0 cm | |
| Dec. 17 | Light rain | 10° /5° | 3.3 mm | 0 cm | |
| Dec. 18 | Moderate or heavy snow showers | 5° /0° | 41 mm | 0.5 cm | |
| Dec. 19 | Light snow showers | 1° /-1° | 0.4 mm | 0.3 cm | |
| Dec. 20 | Partly cloudy | 3° /-2° | 0 mm | 0 cm | |
| Dec. 21 | Cloudy | 2° /-2° | 0 mm | 0 cm | |
| Dec. 22 | Patchy moderate snow | 4° /-2° | 1.9 mm | 0.4 cm | |
| Dec. 23 | Moderate snow | 5° /-6° | 2.8 mm | 0.8 cm | |
| Dec. 24 | Light freezing rain | 0° /-4° | 2.1 mm | 1.4 cm | |
| Dec. 25 | Overcast | 3° /-2° | 0.1 mm | 0 cm | |
| Dec. 26 | Light freezing rain | 4° /-2° | 1.4 mm | 0 cm | |
| Dec. 27 | Overcast | 5° /-1° | 11.5 mm | 0 cm | |
| Dec. 28 | Overcast | 10° /2° | 3.6 mm | 0 cm | |
| Dec. 29 | Cloudy | 10° /2° | 6 mm | 0 cm | |
| Dec. 30 | Overcast | 8° /3° | 0.3 mm | 0.2 cm | |
| Dec. 31 | Heavy rain at times | 8° /3° | 5 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?
Brace for cold days with temperatures not exceeding 5° and nights that are likely to be freezing. Winter clothing is essential for comfort and safety.
How much rainfall should be expected in Pennsylvania during December?
Significant rainfall exceeding 204.6 mm is expected in Pennsylvania during December, occurring over more than 12 days. Preparing for wet conditions is recommended in your planning.
Will it snow in Pennsylvania in December 2025?
Pennsylvania experiences an average snowfall of 6.91667 cm during December, occurring over 10 days.
What are the typical wind conditions in Pennsylvania during December?
The average wind speed in Pennsylvania during December is 16 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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