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
Stepping into December, Allison Park observes a temperature decline, with the average high falling from November's frosty 48.6°F (9.2°C) to a cold 38.7°F (3.7°C). Allison Park's December nights cool down to an average low-temperature of 28°F (-2.2°C).Humidity
The average relative humidity in December is 84%.Rainfall
In Allison Park, in December, during 6.6 rainfall days, 0.67" (17mm) of precipitation is typically accumulated. Throughout the year, there are 104.1 rainfall days, and 8.23" (209mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through May, October through December. In Allison Park, in December, during 6.4 snowfall days, 0.67" (17mm) of snow is typically accumulated. Throughout the year, there are 33.9 snowfall days, and 4.37" (111mm) of snow is accumulated.Daylight
The month with the shortest days is December, with an average of 9h and 18min of daylight.On the first day of December in Allison Park, sunrise is at 7:24 am and sunset at 4:53 pm. On the last day of the month, sunrise is at 7:43 am and sunset at 5:03 pm EST.
Sunshine
The average sunshine in December is 3.2h.UV index
With an average maximum UV index of 1, December is the month with the lowest UV index in Allison Park. A UV Index of 2, and less, symbolizes a minimal health vulnerability from exposure to the Sun's UV rays for the ordinary person.Note: In December, a regular UV index of 1 translates into these guidelines:
It is important to always shield children, babies, and individuals with sensitive skin from prolonged exposure to the sun. Minimize direct exposure to the Sun during midday when its radiation is at its peak. Select sunglasses that boast both UVA and UVB protection to limit the adverse effects of the sun on the eyes. Take heed! The reflection of snow can intensify the Sun's UV radiation nearly double.
Frequently asked questions
How cold is it in Allison Park in December?
What is the average humidity in December in Allison Park?
How much does it rain in Allison Park in December?
How many days does it snow in December in Allison Park?
What is the month with the shortest days in Allison Park?
What is the average length of the day in December in Allison Park?
What time are sunrise and sunset in December in Allison Park?
How long on average sun shines in December in Allison Park?
When is the lowest UV index in Allison Park?
What is the UV index intensity in December in Allison Park?
Average temperature in December
Allison Park, PA
- Average high temperature in December: 38.7°F
The warmest month (with the highest average high temperature) is July (83.3°F).
The month with the lowest average high temperature is January (32.5°F).
- Average low temperature in December: 28°F
The month with the highest average low temperature is July (62.2°F).
The coldest month (with the lowest average low temperature) is January (20.1°F).
Average pressure in December
Allison Park, 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 (29.94"Hg).
Average wind speed in December
Allison Park, 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
Allison Park, PA
- Average humidity in December: 84%
The months with the highest relative humidity are January and February (85%).
The months with the lowest relative humidity are July and August (75%).
Average rainfall in December
Allison Park, PA
- Average rainfall in December: 0.67"
The wettest months (with the highest rainfall) are June and July (0.91").
The driest months (with the least rainfall) are January and November (0.47").
Average rainfall days in December
Allison Park, PA
- Average rainfall days in December: 6.6 days
The month with the highest number of rainy days is May (12.7 days).
The month with the least rainy days is January (4.5 days).
Average snowfall in December
Allison Park, PA
- Average snowfall in December: 0.67"
The month with the highest snowfall is February (1.18").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Allison Park, PA
- Average snowfall days in December: 6.4 days
The month with the highest number of snowfall days is February (9 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Allison Park, 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 12min).
The month with the least sunshine is January (Average sunshine: 2h and 54min).
Average sunshine days in December
Allison Park, PA
- Average sunshine days in December: 20.5 days
The month with the most sunshine days is November (21.5 days).
The month with the least sunshine days is May (14.7 days).
Average UV index in December
Allison Park, PA
- Average UV index in December: 1
The months with the highest UV index are June, July and August (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in December
Allison Park, 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
Allison Park, PA
- Average visibility in December: 5mi
The months with the highest visibility are April, June, August and November (6mi).
The months with the lowest visibility are January, February, March, May, July, September, October and December (5mi).
Allison Park, Pennsylvania, USA
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