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 indicates a shift in the average high-temperature, from November's chilly 47.7°F (8.7°C) to an icy 38.1°F (3.4°C). Nightly temperatures in Mount Jackson drop to an average low of 26.4°F (-3.1°C) in December.Humidity
In Mount Jackson, the average relative humidity in December is 86%.Rainfall
In Mount Jackson, during December, the rain falls for 12 days and regularly aggregates up to 2.68" (68mm) of precipitation. Throughout the year, in Mount Jackson, there are 177.6 rainfall days, and 34.92" (887mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through May, October through December. In Mount Jackson, Pennsylvania, during December, snow falls for 14.3 days and regularly aggregates up to 4.69" (119mm) of snow. In Mount Jackson, during the entire year, snow falls for 68.2 days and aggregates up to 25.2" (640mm) of snow.Daylight
The month with the shortest days in Mount Jackson is December, with an average of 9h and 18min of daylight.On the first day of the month, sunrise is at 7:27 am and sunset at 4:54 pm. On the last day of December, sunrise is at 7:46 am and sunset at 5:03 pm EST.
Sunshine
In December, the average sunshine is 3h.UV index
With an average maximum UV index of 1, December is the month with the lowest UV index. A UV Index estimate of 2, and below, represents a minimal health hazard from exposure to the Sun's UV rays for the ordinary person.Note: The UV index of 1 during December leads to these advisories:
Most individuals face no significant issues with extended sun exposure, but it is always essential to protect children, babies, and those with sensitive skin. Being in direct Sun during midday can be harmful due to intense solar radiation; take precautions. Arm yourself against UV rays' harm with protective apparel and UV-filtering shades. Take to heart! Snow reflection can almost magnify the Sun's UV radiation twofold.
Frequently asked questions
How cold does it get in Mount Jackson in December?
What is the average humidity in December in Mount Jackson?
How many days does it rain in December in Mount Jackson?
How many days does it snow in December in Mount Jackson?
What is the month with the shortest days in Mount Jackson?
What is the average length of the day in December in Mount Jackson?
When are sunrise and sunset in December in Mount Jackson?
How many hours of sunshine does Mount Jackson have in December?
When is the lowest UV index in Mount Jackson?
What is the UV index reading in December in Mount Jackson?
Average temperature in December
Mount Jackson, PA
- Average high temperature in December: 38.1°F
The warmest month (with the highest average high temperature) is July (82°F).
The month with the lowest average high temperature is January (31.5°F).
- Average low temperature in December: 26.4°F
The month with the highest average low temperature is July (60.8°F).
The coldest month (with the lowest average low temperature) is January (18.9°F).
Average pressure in December
Mount Jackson, PA
- Average pressure in December: 30.1"Hg
The month with the highest atmospheric pressure is November (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed in December
Mount Jackson, PA
- Average wind speed in December: 7.6mph
The windiest month (with the highest average wind speed) is January (8.3mph).
The calmest month (with the lowest average wind speed) is July (5.1mph).
Average humidity in December
Mount Jackson, PA
- Average humidity in December: 86%
The month with the highest relative humidity is February (87%).
The months with the lowest relative humidity are April, May, June, July and August (78%).
Average rainfall in December
Mount Jackson, PA
- Average rainfall in December: 2.68"
The wettest month (with the highest rainfall) is June (3.66").
The driest month (with the least rainfall) is November (2.24").
Average rainfall days in December
Mount Jackson, PA
- Average rainfall days in December: 12 days
The month with the highest number of rainy days is May (19.3 days).
The month with the least rainy days is January (8.8 days).
Average snowfall in December
Mount Jackson, PA
- Average snowfall in December: 4.69"
The month with the highest snowfall is January (6.93").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Mount Jackson, PA
- Average snowfall days in December: 14.3 days
The month with the highest number of snowfall days is January (18.6 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Mount Jackson, PA
- Average daylight in December: 9h and 2min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in December: 3h and 0min
The month with the most sunshine is August (Average sunshine: 10h and 0min).
The month with the least sunshine is January (Average sunshine: 2h and 30min).
Average sunshine days in December
Mount Jackson, PA
- Average sunshine days in December: 9.4 days
The month with the most sunshine days is November (13.5 days).
The month with the least sunshine days is February (7 days).
Average UV index in December
Mount Jackson, PA
- Average UV index in December: 1
The month with the highest UV index is July (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in December
Mount Jackson, PA
- Average cloud cover in December: 68
The month with the most cloud cover is January (Cloud cover 73).
The month with the least cloud cover is August (Cloud cover 36).
Average visibility in December
Mount Jackson, PA
- Average visibility in December: 4mi
The month with the highest visibility is April (6mi).
The months with the lowest visibility are January, February and December (4mi).
Mount Jackson, Pennsylvania, USA
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