United StatesAverage weather for Pennsylvania in December
It's cold in December in Pennsylvania with an average temperature of 6°C. Temperatures this month range from a low of 2°C to a high of 8°C. At night, you can expect temperatures between -5°C and 2°C.
Start of December
The month of December starts in Pennsylvania with cold temps, averaging around 7°C during the day and nights around 0°C. You can expect regular precipitation, but there will also be some sunny days in the early part of the month.
Mid December
By mid-December, daytime temps drop to around 5°C, with nights around -1°C. During this part of the month, you might see regular precipitation, but there will also be some sunny days. Wear a heavy winter coat, sweater, long pants, beanie, and gloves.
End of December
By the end of December, the average daytime temperature in Pennsylvania is around 6°C, while nighttime temps are about 0°C. Expect regular precipitation, but if you’re lucky, you’ll also get some dry and sunny days.
In December, there is an average of 150 mm of precipitation, spread over 10 days. Of the total precipitation, about 25 cm falls as snow in December. The wind speed is around 4 Bft, mostly coming from the Southwest.
Pennsylvania in December |
New York | ||
|---|---|---|---|
 Average temperature |
6°C | 9°C | |
 Max. temperature |
8°C | 12°C | |
| Min. temperature |
2°C | -5°C | |
 Total precipitation |
150 mm | 133 mm | |
| Rainy days |
10 days | 17 days | |
 Total snowfall |
25 cm | 9,7 cm | |
| Snowy days |
8 days | 3 days | |
November
UV index
The UV index is a maximum of 2 this month. That's a low value on the intensity scale of 1 to 11. The risk of sunburn is minimal at this time.
Is December a good time to visit Pennsylvania?
Looking for sun? December isn’t a good month to be in Pennsylvania. There’s too much chance of rain this month.
Temperature records
With 19°C in 2015, Pennsylvania reached the highest temperature in December over the past 10 years. The lowest daytime temperature in this month was -12°C in 2022. The extreme nighttime temperatures ranged from a lowest recorded value of -17°C to a highest value of 11°C.
Check out the climate of Pennsylvania for all months and discover the best travel time
The climate in Pennsylvania is based on weather data from . Other places, like New York City, Miami or Los Angeles, might have different weather. You can check out all destinations in Pennsylvania to get the full picture of the climate.
Daily Temperature in December in Pennsylvania
This chart shows the average daily high and low temperatures in December for Pennsylvania, in degrees Celsius. The red line represents the highs, and the blue line shows the lows. The days of the month are displayed at the bottom of the chart. The data, based on historical observations, provide the average temperatures for this month.
Daily Precipitation in December in Pennsylvania
The chart below shows the average daily precipitation in December for Pennsylvania, measured in millimeters over the past few years. Precipitation is always measured as water, even if it’s snow or hail. The days of the month are listed at the bottom of the chart.
A low average precipitation means that the chance of rain on that day is usually small, while a higher average suggests that it rained more often. But remember, it’s just an average, and every day can be different. Based on historical weather data for December, you can expect about 10 days of precipitation in Pennsylvania.
Daily Snowfall in December in Pennsylvania
This chart shows the average daily snowfall in December in Pennsylvania, measured in centimeters. The bottom of the chart shows the days of the month. The data is based on historical measurements and gives an idea of the average snowfall in December.
Daily UV index in December in Pennsylvania
This chart shows the average daily UV index in December in Pennsylvania, with the UV index ranging from 0 to a maximum of 11. The bottom of the chart shows the days of the month. Based on historical data, this chart provides an idea of the daily UV radiation levels you can expect.
Temperature in December in Pennsylvania over the years
This chart shows the average temperature in December in Pennsylvania, measured in degrees Celsius, over the past few years.
Total precipitation in December in Pennsylvania over the years
This chart shows the average precipitation in December in Pennsylvania, measured in millimeters over the past years. Precipitation is always measured as water, whether it’s snow or hail.
Snowfall in December in Pennsylvania per year
This chart shows the average snowfall in December in Pennsylvania, measured in centimeters, over the past few years.
Daily weather in December for Pennsylvania
Click on any day in December to get detailed info about the usual weather on that day in Pennsylvania. Check out the historical temperatures and precipitation over the past 10 years on this day.
Weather experiences in December in Pennsylvania
Have you been to Pennsylvania in December?
Share your weather experience in December in Pennsylvania.
Average weather in Pennsylvania by month
Click on a month below to see detailed weather info for Pennsylvania. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.
Or check out the climate of Pennsylvania for all months at once
