Allentown (PA)
December
Weather in Allentown, Pennsylvania for December 2026
Your guide to Allentown weather in December - trends and predictions
The climate of Allentown in December is quite snowy, averaging 11 snowy days.
In general, the average temperature in Allentown at the beginning of December is 2.1 °F. As the month progressed, temperatures tended to moderately rise, reaching an average of 2.9 °F by the end of December.
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Snow Forecast ❄️
Temperatures
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12
Dry days
8
Rainy days
11
Snow days
2°/-3°
Temperatures
19 km/h
Avg max wind
77 %
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 | 2° /-4° | 0 mm | 0 cm | |
| Dec. 2 |  Sunny | 2° /-3° | 61.6 mm | 1.2 cm | |
| Dec. 3 |  Patchy rain possible | 4° /-4° | 0.1 mm | 0 cm | |
| Dec. 4 | Overcast | 3° /-5° | 0.1 mm | 0 cm | |
| Dec. 5 |  Light freezing rain | 0° /-4° | 1 mm | 0 cm | |
| Dec. 6 | Overcast | 1° /-4° | 0 mm | 0 cm | |
| Dec. 7 | Sunny | 3° /-3° | 0 mm | 0 cm | |
| Dec. 8 | Overcast | 4° /-3° | 0 mm | 0 cm | |
| Dec. 9 |  Moderate or heavy rain shower | 2° /-5° | 8.2 mm | 0 cm | |
| Dec. 10 | Patchy rain possible | 5° /1° | 4.8 mm | 1.3 cm | |
| Dec. 11 | Moderate or heavy rain shower | 7° /0° | 19.8 mm | 0 cm | |
| Dec. 12 | Sunny | 1° /-4° | 0 mm | 0 cm | |
| Dec. 13 | Sunny | 1° /-5° | 0 mm | 0 cm | |
| Dec. 14 | Sunny | 1° /-6° | 3.2 mm | 1.3 cm | |
| Dec. 15 | Light freezing rain | 0° /-7° | 1.6 mm | 1 cm | |
| Dec. 16 | Moderate or heavy rain shower | 4° /-3° | 11.5 mm | 1 cm | |
| Dec. 17 | Overcast | 7° /-1° | 9.5 mm | 0 cm | |
| Dec. 18 | Moderate or heavy rain shower | 5° /-4° | 4.4 mm | 0 cm | |
| Dec. 19 | Overcast | 7° /-2° | 25.8 mm | 0.4 cm | |
| Dec. 20 | Light freezing rain | 1° /-3° | 1.5 mm | 0 cm | |
| Dec. 21 | Light freezing rain | 2° /-5° | 0.7 mm | 0 cm | |
| Dec. 22 | Sunny | -2° /-8° | 0 mm | 0 cm | |
| Dec. 23 |  Partly cloudy | -1° /-6° | 2.4 mm | 0.7 cm | |
| Dec. 24 |  Patchy moderate snow | 4° /-3° | 0.6 mm | 0.2 cm | |
| Dec. 25 |  Cloudy | 1° /-2° | 0 mm | 0 cm | |
| Dec. 26 | Cloudy | -1° /-6° | 2.4 mm | 1.7 cm | |
| Dec. 27 | Partly cloudy | 1° /-4° | 14.6 mm | 10.5 cm | |
| Dec. 28 |  Moderate or heavy snow showers | 3° /-3° | 16.7 mm | 3 cm | |
| Dec. 29 |  Heavy rain at times | 9° /-1° | 9.6 mm | 0 cm | |
| Dec. 30 | Moderate or heavy rain shower | 5° /-1° | 17.7 mm | 0 cm | |
| Dec. 31 |  Freezing fog | 2° /-4° | 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 2° 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 217.7 mm is expected in Allentown during December, occurring over more than 8 days. Preparing for wet conditions is recommended in your planning.
Will it snow in Allentown in December 2026?
Allentown experiences an average snowfall of 22.315 cm during December, occurring over 11 days.
What are the typical wind conditions in Allentown during December?
The average wind speed in Allentown during December is 19 km/h, suggesting breezy to windy conditions, depending on your activities.
Allentown snow forecast December 2026
Track daily snowfall levels and discover Allentown’s snowy potential this December ❄️
On average, Allentown sees 11 snowy days during December, with approximately 22.3 cm of total snowfall.
December rainfall patterns in Allentown
Explore the daily rainfall trends and prepare for Allentowns December weather 💧
Typically, Allentown has 8 rainy days in December with a total of 217.7 mm of rainfall.
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