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
As December begins, there is a decrease in the average high-temperature, falling from a fresh 50°F (10°C) in November to a cold 40.1°F (4.5°C). During the month of December, the nighttime temperature falls to an average of 28.8°F (-1.8°C).Humidity
In Allison, the average relative humidity in December is 83%.Rainfall
In December, the rain falls for 5 days. Throughout December, 0.51" (13mm) of precipitation is accumulated. Throughout the year, there are 82.6 rainfall days, and 6.1" (155mm) of precipitation is accumulated.Snowfall
January through April, November and December are months with snowfall. The months with the most snowfall in Allison are February and December, with an average 0.35" (9mm) of accumulated snow.Daylight
December has the shortest days of the year in Allison, with an average of 9h and 24min of daylight.On the first day of December in Allison, Pennsylvania, sunrise is at 7:22 am and sunset at 4:54 pm. On the last day of the month, sunrise is at 7:41 am and sunset at 5:04 pm EST.
Sunshine
The average sunshine in December is 3.5h.UV index
The months with the lowest UV index in Allison, Pennsylvania, are January through March, October through December, with an average maximum UV index of 2. A UV Index estimate of 2, and below, represents a low health risk from unsafe exposure to UV radiation for the ordinary person.Note: In December, the maximum UV index of 2 translates into these guidelines:
Prolonged sun exposure generally does not trouble most people. However, it is vital to ensure protection for babies, children, and individuals with sensitive skin. Solar radiation peaks around mid-day, so it's wise to limit exposure to the Sun at this time. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Be vigilant! The reflective nature of snow can increase the Sun's UV radiation nearly twofold.
Frequently asked questions
How cold does it get in Allison in December?
What is the average humidity in December in Allison?
How much does it rain in Allison in December?
When does it snow the most in Allison?
How much does it snow in Allison in December?
What is the month with the shortest days in Allison?
What is the average length of the day in December in Allison?
When are sunrise and sunset in December in Allison?
How long on average sun shines in December in Allison?
What are the months with the lowest UV index in Allison?
What is the UV index reading in December in Allison?
Average temperature in December
Allison, PA
- Average high temperature in December: 40.1°F
The warmest month (with the highest average high temperature) is July (83.1°F).
The month with the lowest average high temperature is January (34.3°F).
- Average low temperature in December: 28.8°F
The month with the highest average low temperature is July (61.2°F).
The coldest month (with the lowest average low temperature) is January (21.2°F).
Average pressure in December
Allison, PA
- Average pressure in December: 30.11"Hg
The month with the highest atmospheric pressure is November (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.95"Hg).
Average wind speed in December
Allison, PA
- Average wind speed in December: 7.2mph
The windiest month (with the highest average wind speed) is January (7.8mph).
The calmest month (with the lowest average wind speed) is August (4.6mph).
Average humidity in December
Allison, 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 April, July, August and November (77%).
Average rainfall in December
Allison, PA
- Average rainfall in December: 0.51"
The wettest month (with the highest rainfall) is May (0.71").
The driest month (with the least rainfall) is September (0.28").
Average rainfall days in December
Allison, PA
- Average rainfall days in December: 5 days
The month with the highest number of rainy days is July (9.8 days).
The month with the least rainy days is February (4 days).
Average snowfall in December
Allison, PA
- Average snowfall in December: 0.35"
The months with the highest snowfall are February and December (0.35").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in December
Allison, PA
- Average snowfall days in December: 3.6 days
The month with the highest number of snowfall days is January (6.3 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
Allison, 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 24min).
- Average sunshine in December: 3h and 3min
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
Allison, PA
- Average sunshine days in December: 22.4 days
The month with the most sunshine days is November (23.2 days).
The month with the least sunshine days is June (17.3 days).
Average UV index in December
Allison, PA
- Average UV index in December: 2
The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January, February, March, October, November and December (UV index 2).
Average cloud cover in December
Allison, 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 35).
Average visibility in December
Allison, 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, February, March, May, June, July, August, September, October and December (5mi).
Allison, Pennsylvania, USA
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