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Normal 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.

In December, there is an average of 150 mm of precipitation, spread over 18 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 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.

Pennsylvania in December

UK
Temperature Average Temperature
6°C 9°C
Sun High Temp
8°C 11°C
Sun Low Temp
2°C 8°C
Rain Total Precipitation
150 mm 67 mm
Rain Rainy Days
18 days 10 days
Snow Total Snowfall
25 cm 1,2 cm
Snow Snowy Days
8 days 1 day

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.

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.

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.

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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

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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 Temperature in December in Pennsylvania

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 18 days of rain in Pennsylvania.

Daily Precipitation in December 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 Snowfall in December in Pennsylvania

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.

Daily UV Index in December in Pennsylvania

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.

Temperature in December in Pennsylvania Over the 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.

Precipitation in December in Pennsylvania Over the Years

Snowfall in December in Pennsylvania per year

This chart shows the average snowfall in December in Pennsylvania, measured in centimetres, over the past years.

Snowfall in December in Pennsylvania 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

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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

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