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 commences, the average high-temperature shows a reduction, transitioning from a chilly 45.7°F (7.6°C) in November to a wintry 36°F (2.2°C). During the nights in December, Sweet Valley experiences a consistent average temperature of 25.7°F (-3.5°C).Humidity
The months with the highest humidity in Sweet Valley are February and December, with an average relative humidity of 84%.Rainfall
In Sweet Valley, during December, the rain falls for 10.3 days and regularly aggregates up to 2.17" (55mm) of precipitation. In Sweet Valley, during the entire year, the rain falls for 166.2 days and collects up to 30.83" (783mm) of precipitation.Snowfall
Months with snowfall in Sweet Valley are January through May, October through December. In Sweet Valley, in December, during 11.1 snowfall days, 4.33" (110mm) of snow is typically accumulated. Throughout the year, in Sweet Valley, there are 57.9 snowfall days, and 29.53" (750mm) of snow is accumulated.Daylight
With an average of 9h and 18min of daylight, December has the shortest days of the year in Sweet Valley.On the first day of the month, sunrise is at 7:11 am and sunset at 4:36 pm. On the last day of December, sunrise is at 7:30 am and sunset at 4:45 pm EST.
Sunshine
In December, the average sunshine is 3.8h.UV index
The months with the lowest UV index in Sweet Valley are January and December, with an average maximum UV index of 1. A UV Index reading of 2, and below, represents a minimal health vulnerability from unprotected exposure to Sun's UV rays for ordinary individuals.Note: A maximum high daily UV index of 1 during December translates into the following directions:
Prolonged exposure to sunlight rarely troubles the majority, but constant protection is vital for babies, children, and fair-skinned people. Sun's radiation is most powerful around mid-day, so it's best to limit outdoor activities during this time. Your best bet for sun defense on the face, eyes, and neck is a hat with a wide brim. Attention! Nearly twice the Sun's UV radiation can be reflected by snow.
Frequently asked questions
How cold is it in Sweet Valley in December?
What is the most humid month in Sweet Valley?
What is the average humidity in December in Sweet Valley?
How many days does it rain in December in Sweet Valley?
How much does it snow in Sweet Valley in December?
What is the month with the shortest days in Sweet Valley?
What is the average length of the day in December in Sweet Valley?
When are sunrise and sunset in December in Sweet Valley?
How long on average sun shines in December in Sweet Valley?
When is the lowest UV index in Sweet Valley?
What is the UV index reading in December in Sweet Valley?
Average temperature in December
Sweet Valley, PA
- Average high temperature in December: 36°F
The warmest month (with the highest average high temperature) is July (80.8°F).
The month with the lowest average high temperature is January (29.8°F).
- Average low temperature in December: 25.7°F
The month with the highest average low temperature is July (59°F).
The coldest month (with the lowest average low temperature) is January (18.3°F).
Average pressure in December
Sweet Valley, PA
- Average pressure in December: 30.09"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
Sweet Valley, PA
- Average wind speed in December: 7.6mph
The windiest months (with the highest average wind speed) are March and April (8mph).
The calmest month (with the lowest average wind speed) is August (5mph).
Average humidity in December
Sweet Valley, PA
- Average humidity in December: 84%
The months with the highest relative humidity are February and December (84%).
The months with the lowest relative humidity are April, June and July (78%).
Average rainfall in December
Sweet Valley, PA
- Average rainfall in December: 2.17"
The wettest month (with the highest rainfall) is July (3.19").
The driest month (with the least rainfall) is January (2.01").
Average rainfall days in December
Sweet Valley, PA
- Average rainfall days in December: 10.3 days
The month with the highest number of rainy days is July (19.7 days).
The month with the least rainy days is January (7.8 days).
Average snowfall in December
Sweet Valley, PA
- Average snowfall in December: 4.33"
The month with the highest snowfall is February (8.66").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Sweet Valley, PA
- Average snowfall days in December: 11.1 days
The month with the highest number of snowfall days is January (14.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Sweet Valley, 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 5min
The month with the most sunshine is July (Average sunshine: 10h and 12min).
The months with the least sunshine are January and February (Average sunshine: 3h and 42min).
Average sunshine days in December
Sweet Valley, PA
- Average sunshine days in December: 13.7 days
The month with the most sunshine days is November (15.4 days).
The month with the least sunshine days is July (8.8 days).
Average UV index in December
Sweet Valley, PA
- Average UV index in December: 1
The months with the highest UV index are May, June, July and August (UV index 5).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in December
Sweet Valley, PA
- Average cloud cover in December: 62
The months with the most cloud cover are February and December (Cloud cover 62).
The month with the least cloud cover is July (Cloud cover 37).
Average visibility in December
Sweet Valley, PA
- Average visibility in December: 5mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (5mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (5mi).
Sweet Valley, Pennsylvania, USA
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