Temperatures 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.
Max and Min Temperatures per Day
This chart shows the daily maximum and minimum temperatures in degrees Celsius for Pennsylvania in December. The red line indicates the max temperatures, and the blue line shows the minimums.
Start of December
The month of December starts in Pennsylvania with cold temperatures, averaging around 7°C during the day and nights close to 0°C. You can expect regular precipitation, but there’s also a chance for some sunny days in the first days of the month.
Mid-December
By mid-December, the average daytime temperature drops to around 5°C, with nights close to -1°C. During this part of the month, you can expect regular precipitation, but there’ll also be some sunny days. Wear a thick winter coat, jumper, long trousers, hat, and gloves.
End of December
By the end of December, the average daytime temperature in Pennsylvania will be around 6°C, with nights close to 0°C. There’s regular precipitation, but with a bit of luck, you’ll also get some dry and sunny days.
Discover cheap holidays to Pennsylvania 
Precipitation in December
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.
The average precipitation chance is 31% per day this month. Though it seems pretty low, the weather’s variable. Some days have higher and others lower precipitation chances, which lowers the average.
Precipitation Chance
This chart shows the daily precipitation chance (in percentages) in December for Pennsylvania. 0% means it never rained on that day in the past 10 years, and 100% means it rained every day. All values in between represent the average chance of precipitation on that day.
Pennsylvania in December |
UK | ||
|---|---|---|---|
 Average Temperature |
6°C | 9°C | |
 High Temp |
8°C | 11°C | |
| Low Temp |
2°C | 8°C | |
 Total Precipitation |
150 mm | 67 mm | |
| Rainy Days |
10 days | 10 days | |
 Total Snowfall |
25 cm | 1,2 cm | |
| Snowy Days |
8 days | 1 day | |
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?
After some sun? Then December isn’t the best time to be in Pennsylvania. There’s too much chance of rain this month.
Temperature records for Pennsylvania in December
With 19°C, Pennsylvania hit the highest temperature in the last 10 years in December 2015. The lowest daytime temperature in this month was -12°C in 2022. The extreme night temperatures ranged from a low of -17°C to a high of 11°C.
Check out the climate of Pennsylvania for all months and discover the best travel time
The climate of Pennsylvania is based on weather data from . Other spots, like New York City, Miami or Los Angeles, might have different weather. You can check out all destinations in Pennsylvania for a full picture of the climate.
Plan your next holiday
Don’t miss the best holiday deals for Pennsylvania and see what our partners have for you.
Daily Temperature in December in Pennsylvania
This chart shows the average daily temperatures, both day and night, for each day in December in Pennsylvania, measured in degrees Celsius. The red line represents the maximum temperatures, while the blue line shows the minimums. The days of the month are displayed at the bottom of the chart. The data, based on historical observations, gives an overview of the average daily temperatures during this month.
Daily Precipitation in December in Pennsylvania
The chart below shows the average daily precipitation in December for Pennsylvania, measured in millimetres over the past years. Precipitation is always measured as water, even if it’s snow or hail. The days of the month are shown 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 rain is more likely. But it’s still an average, so each day can be different. Based on historical weather data for December, you can expect around 10 days of rain in Pennsylvania.
Daily Snowfall in December in Pennsylvania
This chart shows the average daily snowfall in December in Pennsylvania, measured in centimetres. 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 years.
Total Precipitation in December in Pennsylvania Over the Years
This chart shows the average precipitation in December in Pennsylvania, measured in millimetres over the past years. Precipitation is always measured as water, even if it’s snow or hail.
Snowfall in December in Pennsylvania per year
This chart shows the average snowfall in December in Pennsylvania, measured in centimetres, over the past years.
Daily climate in December for Pennsylvania
Click on a specific day in December for detailed info on the typical 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
