Allentown (PA)
December
Weather in Allentown, Pennsylvania for December 2025
Your guide to Allentown weather in December - trends and predictions
With an average of 5 snowy days, Allentown usually enjoys a light touch of snow in December.
In general, the average temperature in Allentown at the beginning of December is 2.1 °F. As the month progressed, temperatures tended to significantly warm up, reaching an average of 5.3 °F by the end of December.
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Snow Forecast ❄️
Temperatures
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16
Dry days
10
Rainy days
5
Snow days
4°/-3°
Temperatures
18 km/h
Avg max wind
78 %
Avg humidity
Allentown Weather December
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Temperatures trend during December in Allentown
See the weather trend as well as the moving average line
December weather in Allentown day by day
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| Date | Weather | Temperatures | Rain | Snow | More |
|---|---|---|---|---|---|
| Dec. 1 |  Overcast | 1° /-5° | 0 mm | 0 cm | |
| Dec. 2 |  Sunny | 2° /-5° | 0.2 mm | 0 cm | |
| Dec. 3 |  Patchy rain possible | 4° /-4° | 0.2 mm | 0 cm | |
| Dec. 4 | Overcast | 1° /-4° | 0.1 mm | 0 cm | |
| Dec. 5 |  Light freezing rain | 2° /-2° | 2 mm | 0 cm | |
| Dec. 6 | Overcast | 1° /-3° | 0 mm | 0 cm | |
| Dec. 7 | Sunny | 4° /-3° | 0 mm | 0 cm | |
| Dec. 8 | Overcast | 9° /0° | 0 mm | 0 cm | |
| Dec. 9 |  Moderate or heavy rain shower | 4° /0° | 16.4 mm | 0 cm | |
| Dec. 10 | Patchy rain possible | 8° /4° | 1.2 mm | 0 cm | |
| Dec. 11 | Moderate or heavy rain shower | 13° /4° | 39.6 mm | 0 cm | |
| Dec. 12 | Sunny | 2° /-3° | 0 mm | 0 cm | |
| Dec. 13 | Sunny | 0° /-4° | 0 mm | 0 cm | |
| Dec. 14 | Sunny | 1° /-6° | 0 mm | 0 cm | |
| Dec. 15 | Light freezing rain | 1° /-5° | 3.3 mm | 2 cm | |
| Dec. 16 | Moderate or heavy rain shower | 6° /0° | 22.9 mm | 2 cm | |
| Dec. 17 | Overcast | 11° /3° | 19 mm | 0 cm | |
| Dec. 18 | Moderate or heavy rain shower | 6° /1° | 8.7 mm | 0 cm | |
| Dec. 19 | Overcast | 4° /0° | 1.5 mm | 0.9 cm | |
| Dec. 20 | Light freezing rain | 1° /-1° | 3.1 mm | 0 cm | |
| Dec. 21 | Light freezing rain | 0° /-6° | 1.4 mm | 0 cm | |
| Dec. 22 | Sunny | -5° /-10° | 0 mm | 0 cm | |
| Dec. 23 |  Partly cloudy | -3° /-11° | 0 mm | 0 cm | |
| Dec. 24 |  Patchy moderate snow | 2° /-5° | 1.1 mm | 0.4 cm | |
| Dec. 25 |  Cloudy | 1° /-3° | 0 mm | 0 cm | |
| Dec. 26 | Cloudy | 0° /-6° | 0 mm | 0 cm | |
| Dec. 27 | Partly cloudy | 3° /-5° | 0 mm | 0 cm | |
| Dec. 28 |  Moderate or heavy snow showers | 6° /0° | 33.5 mm | 5.9 cm | |
| Dec. 29 |  Heavy rain at times | 12° /2° | 9.4 mm | 0 cm | |
| Dec. 30 | Moderate or heavy rain shower | 11° /3° | 35.4 mm | 0 cm | |
| Dec. 31 |  Freezing fog | 4° /-2° | 0 mm | 0 cm | |
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Important Notice
Our weather forecast for Allentown 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 Allentown forecast closer to your planned date for the most up-to-date weather information.
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Allentown in December - FAQ
What are the expected maximum and minimum temperatures in Allentown during December?
Brace for cold days with temperatures not exceeding 4° and nights that are likely to be freezing. Winter clothing is essential for comfort and safety.
How much rainfall should be expected in Allentown during December?
Significant rainfall exceeding 198.9 mm is expected in Allentown during December, occurring over more than 10 days. Preparing for wet conditions is recommended in your planning.
Will it snow in Allentown in December 2025?
Allentown experiences an average snowfall of 11.2 cm during December, occurring over 5 days.
What are the typical wind conditions in Allentown during December?
The average wind speed in Allentown during December is 18 km/h, suggesting breezy to windy conditions, depending on your activities.
Allentown snow forecast December 2025
Track daily snowfall levels and discover Allentown’s snowy potential this December ❄️
December rainfall patterns in Allentown
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