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 brings a decrease in the average high-temperature, shifting from a chilly 48.9°F (9.4°C) in November to a wintry 39.4°F (4.1°C). Joffre reports a consistent average low-temperature of 27.9°F (-2.3°C) throughout December nights.Humidity
In December, the average relative humidity is 84%.Rainfall
In Joffre, in December, during 12.9 rainfall days, 2.95" (75mm) of precipitation is typically accumulated. In Joffre, during the entire year, the rain falls for 183.5 days and collects up to 34.37" (873mm) of precipitation.Snowfall
Months with snowfall are January through May, October through December. In December, it is snowing for 13.2 days. Throughout December, 4.49" (114mm) of snow is accumulated. In Joffre, during the entire year, snow falls for 61.6 days and aggregates up to 23.9" (607mm) of snow.Daylight
December has the shortest days of the year, with an average of 9h and 18min of daylight.On the first day of the month, sunrise is at 7:25 am and sunset at 4:55 pm. On the last day of December, sunrise is at 7:44 am and sunset at 5:05 pm EST.
Sunshine
In December, the average sunshine is 3.4h.UV index
With an average maximum UV index of 1, December is the month with the lowest UV index. A UV Index of 2, and less, symbolizes a low threat to health from exposure to the Sun's UV rays for average individuals.Note: In December, the maximum UV index of 1 suggests this advice:
It is important to always shield children, babies, and individuals with sensitive skin from prolonged exposure to the sun. Direct exposure to the Sun's intense radiation around midday should be avoided for health reasons. Employ a hat with a wide brim for robust protection, cutting UV exposure by half. Mind you! Snow reflection can increase the intensity of the Sun's UV radiation nearly twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Is December cold?
What is the average humidity in December?
How much does it rain in December?
How much does it snow in December?
What is the month with the shortest days?
What is the average length of the day in December in Joffre?
When are sunrise and sunset in December?
How long on average sun shines in December?
When is the lowest UV index in Joffre?
What is the UV index reading in December?
Average temperature in December
Joffre, PA
- Average high temperature in December: 39.4°F
The warmest month (with the highest average high temperature) is July (83.5°F).
The month with the lowest average high temperature is January (33.1°F).
- Average low temperature in December: 27.9°F
The month with the highest average low temperature is July (61.5°F).
The coldest month (with the lowest average low temperature) is January (20.5°F).
Average pressure in December
Joffre, 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
Joffre, PA
- Average wind speed in December: 7.3mph
The windiest month (with the highest average wind speed) is January (8mph).
The calmest month (with the lowest average wind speed) is August (4.6mph).
Average humidity in December
Joffre, PA
- Average humidity in December: 84%
The month with the highest relative humidity is February (85%).
The months with the lowest relative humidity are April, July and August (77%).
Average rainfall in December
Joffre, PA
- Average rainfall in December: 2.95"
The wettest month (with the highest rainfall) is April (3.54").
The driest month (with the least rainfall) is November (2.28").
Average rainfall days in December
Joffre, PA
- Average rainfall days in December: 12.9 days
The month with the highest number of rainy days is May (20.5 days).
The month with the least rainy days is January (10.7 days).
Average snowfall in December
Joffre, PA
- Average snowfall in December: 4.49"
The month with the highest snowfall is January (6.1").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Joffre, PA
- Average snowfall days in December: 13.2 days
The month with the highest number of snowfall days is January (17.4 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Joffre, 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 2min
The month with the most sunshine is August (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 3h and 0min).
Average sunshine days in December
Joffre, PA
- Average sunshine days in December: 9.5 days
The month with the most sunshine days is November (15.1 days).
The month with the least sunshine days is January (7.8 days).
Average UV index in December
Joffre, PA
- Average UV index in December: 1
The months with the highest UV index are June and July (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in December
Joffre, PA
- Average cloud cover in December: 64
The month with the most cloud cover is January (Cloud cover 69).
The month with the least cloud cover is August (Cloud cover 34).
Average visibility in December
Joffre, PA
- Average visibility in December: 5mi
The months with the highest visibility are April and November (6mi).
The months with the lowest visibility are January and February (4mi).
Joffre, Pennsylvania, USA
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