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
Westover observes a minor decrease in the average high-temperature with the arrival of December, falling from November's frosty 46.2°F (7.9°C) to an icy 36.5°F (2.5°C). The nights of December anticipate an average low-temperature of 26.4°F (-3.1°C).Humidity
In December, the average relative humidity is 85%.Rainfall
In Westover, in December, during 7.2 rainfall days, 0.94" (24mm) of precipitation is typically accumulated. Throughout the year, there are 121.6 rainfall days, and 10.75" (273mm) of precipitation is accumulated.Snowfall
Months with snowfall in Westover are January through May, October through December. In Westover, during December, snow falls for 9.2 days and regularly aggregates up to 2.01" (51mm) of snow. In Westover, during the entire year, snow falls for 49.1 days and aggregates up to 10.43" (265mm) 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 7:20 am and sunset at 4:47 pm. On the last day of December, sunrise is at 7:38 am and sunset at 4:57 pm EST.
Sunshine
In Westover, the average sunshine in December is 3.3h.UV index
With an average maximum UV index of 1, December is the month with the lowest UV index. A UV Index reading of 2, and below, represents a low health risk from exposure to the Sun's UV radiation for ordinary individuals.Note: In December, the maximum UV index of 1 translates into these guidelines:
Most individuals can handle sun exposure for up to an hour without burning, but children must always be shielded from sun exposure. Direct exposure to the Sun during its peak hours around mid-day should be minimized for safety. Fend off the sun's harsh rays with appropriate clothing, a wide-brim hat, and UV-protective sunglasses. Mark this! Snow reflection can nearly double the UV radiation intensity from the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is December?
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?
How many hours of daylight does Westover have in December?
What time are sunrise and sunset in December?
How many hours of sunshine does Westover have in December?
What is the month with the lowest UV index in Westover?
What is the UV index intensity in December?
Average temperature in December
Westover, PA
- Average high temperature in December: 36.5°F
The warmest month (with the highest average high temperature) is July (80.2°F).
The month with the lowest average high temperature is January (30.4°F).
- Average low temperature in December: 26.4°F
The month with the highest average low temperature is July (58.8°F).
The coldest month (with the lowest average low temperature) is January (18.5°F).
Average pressure in December
Westover, PA
- Average pressure in December: 30.1"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
Westover, PA
- Average wind speed in December: 9.2mph
The windiest month (with the highest average wind speed) is January (9.8mph).
The calmest month (with the lowest average wind speed) is August (5.3mph).
Average humidity in December
Westover, PA
- Average humidity in December: 85%
The month with the highest relative humidity is February (87%).
The months with the lowest relative humidity are April, June, July and August (78%).
Average rainfall in December
Westover, PA
- Average rainfall in December: 0.94"
The wettest month (with the highest rainfall) is May (1.26").
The driest month (with the least rainfall) is September (0.55").
Average rainfall days in December
Westover, PA
- Average rainfall days in December: 7.2 days
The month with the highest number of rainy days is May (15.6 days).
The month with the least rainy days is January (5.8 days).
Average snowfall in December
Westover, PA
- Average snowfall in December: 2.01"
The month with the highest snowfall is January (2.64").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Westover, PA
- Average snowfall days in December: 9.2 days
The month with the highest number of snowfall days is January (12.7 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Westover, 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 July (Average sunshine: 9h and 54min).
The month with the least sunshine is January (Average sunshine: 2h and 54min).
Average sunshine days in December
Westover, PA
- Average sunshine days in December: 17.6 days
The month with the most sunshine days is November (19.9 days).
The month with the least sunshine days is May (12.3 days).
Average UV index in December
Westover, PA
- Average UV index in December: 1
The months with the highest UV index are May, June, July and August (UV index 5).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in December
Westover, PA
- Average cloud cover in December: 68
The month with the most cloud cover is January (Cloud cover 72).
The month with the least cloud cover is August (Cloud cover 38).
Average visibility in December
Westover, PA
- Average visibility in December: 5mi
The month with the highest visibility is April (6mi).
The months with the lowest visibility are January, February, March, May, June, July, August, September, October, November and December (5mi).
Westover, Pennsylvania, USA
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