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Williamsport (PA)
Winston-Salem (NC) More Locations
United States weather

Weather in Williamsport, Pennsylvania for December 2025

Your guide to Williamsport weather in December - trends and predictions

    Snow Forecast ❄️

  • With an average of 2 snowy days, Williamsport usually enjoys a light touch of snow in December.
    According to Williamsport snow forecast for December 2025, 4 snowy days are expected until the end of the month. The closest date with snow is Saturday, December 20.

    • Temperatures

  • Until now, December 2025 in Williamsport is slightly cooler than the historical average by -0.6 °F.

  • The forecast for the upcoming days in Williamsport predicts a temperature of 3.5 °F, which is slightly above the historical average.

  • In general, the average temperature in Williamsport at the beginning of December is 0.6 °F. As the month progressed, temperatures tended to moderately rise, reaching an average of 2 °F by the end of December.

    • Rain 🌧️

  • Williamsport experiences moderate rainfall in December, with an average of 10 rainy days and a total precipitation of 228.5 mm.

    • More

  • New! Chat with our AI weatherman - it’s amazing and free.

Average dry days
19
Dry days
Average rainy days
10
Rainy days
Average snowy days
2
Snow days
Average temperatures
1°/-2°
Temperatures
Average wind speed
13 km/h
Avg max wind
Average humidity
74 %
Avg humidity

Williamsport Weather December

Move between months or click on a day
November
January
Sun.Mon.Tue.Wed.Thu.Fri.Sat.
1
Overcast
1°
2
Overcast
1°
3
Mist
2°
4
Overcast
0°
5
Overcast
-1°
6
Overcast
1°
7
Cloudy
0°
8
Overcast
2°
9
Moderate rain
-0°
10
Fog
3°
11
Heavy snow
2°
12
Partly cloudy
0°
13
Partly cloudy
-1°
14
Sunny
-1°
15
Overcast
-1°
16
Moderate rain
3°
17
Partly cloudy
12°
18
Mist
3°
19
Heavy rain
11°
20
Partly cloudy
1°
21
Partly cloudy
4°
22
Partly cloudy
-1°
23
Overcast
1°
24
Overcast
8°
25
Patchy rain possible
4°
26
Overcast
3°
27
Overcast
2°
28
Sunny
-1°
29
Moderate or heavy snow showers
-3°
30
Moderate snow
5°
31
Moderate rain at times
4°

Temperatures trend during December in Williamsport

See the weather trend as well as the moving average line

December weather in Williamsport day by day

Click on a date for more information
November January
Date Weather Temperatures Rain Snow More
Dec. 1 Overcast
Overcast
 1° /-3° 0 mm 0 cm
Dec. 2 Overcast
Overcast
 1° /-3° 37.2 mm 26.9 cm
Dec. 3 Mist
Mist
 2° /-3° 0 mm 0 cm
Dec. 4 Overcast
Overcast
 0° /-4° 0 mm 0 cm
Dec. 5 Overcast
Overcast
 -1° /-6° 1.6 mm 1.2 cm
Dec. 6 Overcast
Overcast
 1° /-4° 0 mm 0 cm
Dec. 7 Cloudy
Cloudy
 0° /-2° 0 mm 0 cm
Dec. 8 Overcast
Overcast
 2° /-3° 0 mm 0 cm
Dec. 9 Moderate rain
Moderate rain
 0° /-5° 15.3 mm 0 cm
Dec. 10 Fog
Fog
 3° /-1° 4.4 mm 0 cm
Dec. 11 Heavy snow
Heavy snow
 2° /-2° 10.4 mm 3.7 cm
Dec. 12 Partly cloudy
Partly cloudy
 0° /-5° 0 mm 0 cm
Dec. 13 Partly cloudy
Partly cloudy
 -1° /-6° 0 mm 0 cm
Dec. 14 Sunny
Sunny
 -1° /-7° 0 mm 0 cm
Dec. 15 Overcast
Overcast
 -1° /-7° 0 mm 0 cm
Dec. 16 Moderate rain
Moderate rain
 3° /0° 46.7 mm 0 cm
Dec. 17 Partly cloudy
Partly cloudy
 12° /-5° 0 mm 0 cm
Dec. 18 Mist
Mist
 3° /-8° 3.1 mm 0 cm
Dec. 19 Heavy rain
Heavy rain
 11° /-3° 67.4 mm 0 cm
Dec. 20 Partly cloudy
Partly cloudy
 1° /-3° 0 mm 0 cm
Dec. 21 Partly cloudy
Partly cloudy
 4° /-4° 0 mm 0 cm
Dec. 22 Partly cloudy
Partly cloudy
 -1° /-5° 0 mm 0 cm
Dec. 23 Overcast
Overcast
 1° /-4° 0.1 mm 0 cm
Dec. 24 Overcast
Overcast
 8° /-1° 0 mm 0 cm
Dec. 25 Patchy rain possible
Patchy rain possible
 4° /1° 1.1 mm 0 cm
Dec. 26 Overcast
Overcast
 3° /-1° 0 mm 0 cm
Dec. 27 Overcast
Overcast
 2° /-3° 0.1 mm 0.1 cm
Dec. 28 Sunny
Sunny
 -1° /-5° 0 mm 0 cm
Dec. 29 Moderate or heavy snow showers
Moderate or heavy snow showers
 -3° /-7° 1.6 mm 1.1 cm
Dec. 30 Moderate snow
Moderate snow
 5° /-8° 1 mm 0.7 cm
Dec. 31 Moderate rain at times
Moderate rain at times
 4° /0° 15 mm 0 cm
Next
Important Notice
Our weather forecast for Williamsport 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 Williamsport forecast closer to your planned date for the most up-to-date weather information.
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Williamsport in December - FAQ

What are the expected maximum and minimum temperatures in Williamsport during December?
Brace for cold days with temperatures not exceeding 1° and nights that are likely to be freezing. Winter clothing is essential for comfort and safety.
How much rainfall should be expected in Williamsport during December?
Significant rainfall exceeding 228.5 mm is expected in Williamsport during December, occurring over more than 10 days. Preparing for wet conditions is recommended in your planning.
Will it snow in Williamsport in December 2025?
Williamsport experiences an average snowfall of 9.86 cm during December, occurring over 2 days.
What are the typical wind conditions in Williamsport during December?
The average wind speed in Williamsport during December is 13 km/h, suggesting breezy to windy conditions, depending on your activities.

Williamsport snow forecast December 2025

Track daily snowfall levels and discover Williamsport’s snowy potential this December ❄️
On average, Williamsport sees 2 snowy days during December, with approximately 9.9 cm of total snowfall.

December rainfall patterns in Williamsport

Explore the daily rainfall trends and prepare for Williamsports December weather 💧
Typically, Williamsport has 10 rainy days in December with a total of 228.5 mm of rainfall.

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Location coordinates Where is Williamsport?

Get accurate weather forecasts for Williamsport, located at latitude 41.241 and longitude -77.001. Stay updated with localized weather information tailored for Williamsport.

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