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
Welcoming December, Mountville observes a shift in the average high-temperature, falling from November's cool 51.1°F (10.6°C) to a cold 41.9°F (5.5°C). During December nights, Mountville records an average temperature of 30°F (-1.1°C).Humidity
In December, the average relative humidity is 79%.Rainfall
In Mountville, during December, the rain falls for 8.2 days and regularly aggregates up to 1.1" (28mm) of precipitation. Throughout the year, in Mountville, there are 125.9 rainfall days, and 15.08" (383mm) of precipitation is accumulated.Snowfall
January through May, October through December are months with snowfall in Mountville. In Mountville, in December, snow falls for 2.6 days, with typically accumulated 0.79" (20mm) of snow. Throughout the year, there are 16.4 snowfall days, and 5.04" (128mm) of snow is accumulated.Daylight
December has the shortest days of the year in Mountville, Pennsylvania, with an average of 9h and 24min of daylight.On the first day of the month, sunrise is at 7:09 am and sunset at 4:40 pm. On the last day of December, sunrise is at 7:27 am and sunset at 4:50 pm EST.
Sunshine
The average sunshine in December in Mountville, Pennsylvania, is 4.8h.UV index
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index of 2, and less, symbolizes a low health risk from unprotected exposure to Sun's UV rays for average individuals.Note: In December, the average maximum UV index of 2 translates into the following recommendations:
Babies, children, and those with sensitive skin should always avoid extended periods in the sun. The Sun's harshest UV rays are around midday; it's wise to seek shade and limit time outdoors. Equip yourself with UVA and UVB-filtering sunglasses on clear, sunny days. Consider carefully! The reflective quality of snow can almost double the intensity of the Sun's UV radiation.
Frequently asked questions
Is it cold in Mountville during December?
What is the average humidity in December in Mountville?
How much does it rain in Mountville in December?
How much does it snow in Mountville in December?
What is the month with the shortest days in Mountville?
What is the average length of the day in December in Mountville?
When are sunrise and sunset in December in Mountville?
How many hours of sunshine does Mountville have in December?
When is the lowest UV index in Mountville?
How high is the UV index in December in Mountville?
Average temperature in December
Mountville, PA
- Average high temperature in December: 41.9°F
The warmest month (with the highest average high temperature) is July (82.9°F).
The month with the lowest average high temperature is January (35.4°F).
- Average low temperature in December: 30°F
The month with the highest average low temperature is July (64.6°F).
The coldest month (with the lowest average low temperature) is January (22.8°F).
Average pressure in December
Mountville, 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 (29.94"Hg).
Average wind speed in December
Mountville, PA
- Average wind speed in December: 8.3mph
The windiest months (with the highest average wind speed) are February and March (8.9mph).
The calmest month (with the lowest average wind speed) is August (5.1mph).
Average humidity in December
Mountville, PA
- Average humidity in December: 79%
The month with the highest relative humidity is May (81%).
The month with the lowest relative humidity is April (76%).
Average rainfall in December
Mountville, PA
- Average rainfall in December: 1.1"
The wettest month (with the highest rainfall) is August (2.09").
The driest month (with the least rainfall) is February (0.83").
Average rainfall days in December
Mountville, PA
- Average rainfall days in December: 8.2 days
The month with the highest number of rainy days is July (14.9 days).
The month with the least rainy days is February (5.7 days).
Average snowfall in December
Mountville, PA
- Average snowfall in December: 0.79"
The month with the highest snowfall is March (1.46").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Mountville, PA
- Average snowfall days in December: 2.6 days
The month with the highest number of snowfall days is February (4.7 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Mountville, 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: 4h and 5min
The month with the most sunshine is July (Average sunshine: 10h and 24min).
The month with the least sunshine is February (Average sunshine: 4h and 30min).
Average sunshine days in December
Mountville, PA
- Average sunshine days in December: 19.9 days
The month with the most sunshine days is November (21.4 days).
The month with the least sunshine days is July (13.3 days).
Average UV index in December
Mountville, 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, November and December (UV index 2).
Average cloud cover in December
Mountville, PA
- Average cloud cover in December: 49
The months with the most cloud cover are February, March and December (Cloud cover 49).
The month with the least cloud cover is July (Cloud cover 32).
Average visibility in December
Mountville, PA
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, June, July, October, November and December (6mi).
The months with the lowest visibility are May, August and September (5mi).
Mountville, Pennsylvania, USA
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