Contents
- Weather in December
- Frequently asked questions
- Average temperature in December
- Average pressure in December
- Average wind speed in December
- Average humidity in December
- Average rainfall in December
- Average rainfall days in December
- Average snowfall in December
- Average snowfall days in December
- Average daylight in December
- Average sunshine in December
- Average sunshine days in December
- Average UV index in December
- Average cloud cover in December
- Average visibility in December
Weather in December
Temperature
December's onset brings a reduction in the average high-temperature, from a frosty 49.1°F (9.5°C) in November to a wintry 39.4°F (4.1°C). An average nighttime temperature of 28.4°F (-2°C) is observed during December.Humidity
The average relative humidity in December is 83%.Rainfall
In Thornburg, in December, during 10.5 rainfall days, 2.13" (54mm) of precipitation is typically accumulated. In Thornburg, during the entire year, the rain falls for 163.6 days and collects up to 26.93" (684mm) of precipitation.Snowfall
Months with snowfall are January through April, October through December. In December, it is snowing for 10.3 days. Throughout December, 2.01" (51mm) of snow is accumulated. Throughout the year, there are 47.7 snowfall days, and 11.77" (299mm) of snow is accumulated.Daylight
With an average of 9h and 18min of daylight, December has the shortest days of the year.On the first day of December, sunrise is at 7:24 am and sunset at 4:54 pm. On the last day of the month, sunrise is at 7:43 am and sunset at 5:03 pm EST.
Sunshine
In December, the average sunshine in Thornburg is 3.2h.UV index
The month with the lowest UV index is December, with an average maximum UV index of 1. A UV Index value of 2, and less, symbolizes a minimal health vulnerability from unprotected exposure to Sun's UV rays for average individuals.Note: The average daily UV index of 1 in December transforms into the following instructions:
Children must always have sun protection, unlike most people, who can tolerate up to an hour in the sun without any burns. Solar radiation peaks around mid-day, so it's wise to limit exposure to the Sun at this time. It's wise to wear UVA and UVB-blocking sunglasses when the sun shines brightly. Be alert! Nearly double the UV rays from the Sun can be reflected by snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold does it get in December?
What is the average humidity in December?
How much does it rain in December?
How much does it snow in Thornburg in December?
What is the month with the shortest days?
What is the average length of the day in December?
When is the sunrise / sunset in December?
How long on average sun shines in December?
What is the month with the lowest UV index?
What is the UV index intensity in December?
Average temperature in December
Thornburg, PA
- Average high temperature in December: 39.4°F
The warmest month (with the highest average high temperature) is July (84°F).
The month with the lowest average high temperature is January (33.1°F).
- Average low temperature in December: 28.4°F
The month with the highest average low temperature is July (63°F).
The coldest month (with the lowest average low temperature) is January (21°F).
Average pressure in December
Thornburg, PA
- Average pressure in December: 30.11"Hg
The month with the highest atmospheric pressure is November (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.95"Hg).
Average wind speed in December
Thornburg, PA
- Average wind speed in December: 7.3mph
The windiest month (with the highest average wind speed) is January (8mph).
The calmest months (with the lowest average wind speed) are July and August (4.8mph).
Average humidity in December
Thornburg, PA
- Average humidity in December: 83%
The months with the highest relative humidity are January and February (84%).
The months with the lowest relative humidity are July and August (73%).
Average rainfall in December
Thornburg, PA
- Average rainfall in December: 2.13"
The wettest month (with the highest rainfall) is May (3.07").
The driest month (with the least rainfall) is November (1.54").
Average rainfall days in December
Thornburg, PA
- Average rainfall days in December: 10.5 days
The month with the highest number of rainy days is May (18.9 days).
The month with the least rainy days is January (8.9 days).
Average snowfall in December
Thornburg, PA
- Average snowfall in December: 2.01"
The month with the highest snowfall is January (3.31").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
Thornburg, PA
- Average snowfall days in December: 10.3 days
The month with the highest number of snowfall days is January (14.4 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Thornburg, PA
- Average daylight in December: 9h and 2min
The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in December: 3h and 1min
The month with the most sunshine is August (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 2h and 48min).
Average sunshine days in December
Thornburg, PA
- Average sunshine days in December: 11.5 days
The month with the most sunshine days is November (16.5 days).
The month with the least sunshine days is February (9.6 days).
Average UV index in December
Thornburg, PA
- Average UV index in December: 1
The months with the highest UV index are May, June and July (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in December
Thornburg, PA
- Average cloud cover in December: 67
The month with the most cloud cover is January (Cloud cover 70).
The month with the least cloud cover is August (Cloud cover 34).
Average visibility in December
Thornburg, PA
- Average visibility in December: 5mi
The months with the highest visibility are April, June, July, August and November (6mi).
The months with the lowest visibility are January, February, March, May, September, October and December (5mi).
Thornburg, Pennsylvania, USA
Weather forecast for your location
2. Allow the app to use your location