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
Transition from November to December is accompanied by a temperature drop, with average high-temperatures decreasing from a cool 50.9°F (10.5°C) to a cold 41.9°F (5.5°C). The average low-temperature during December nights is a subzero cold 30.4°F (-0.9°C).Humidity
The average relative humidity in December in Witmer, Pennsylvania, is 79%.Rainfall
In Witmer, during December, the rain falls for 10.6 days and regularly aggregates up to 2.56" (65mm) of precipitation. In Witmer, during the entire year, the rain falls for 158.5 days and collects up to 32.01" (813mm) of precipitation.Snowfall
Months with snowfall in Witmer are January through May, October through December. In Witmer, in December, snow falls for 3.7 days, with typically accumulated 1.81" (46mm) of snow. Throughout the year, in Witmer, there are 24.5 snowfall days, and 12.99" (330mm) of snow is accumulated.Daylight
With an average of 9h and 24min of daylight, December has the shortest days of the year.On the first day of the month, sunrise is at 7:08 am and sunset at 4:40 pm. On the last day of December, in Witmer, sunrise is at 7:26 am and sunset at 4:49 pm EST.
Sunshine
In December, the average sunshine in Witmer, Pennsylvania, is 4.8h.UV index
The months with the lowest UV index in Witmer are January through March, November and December, with an average maximum UV index of 2. A UV Index of 2, and less, symbolizes a minimal health hazard from unprotected exposure to Sun's UV rays for ordinary individuals.Note: In December, the UV index of 2 transforms into the following advice:
Protection from prolonged sun exposure is necessary for babies, children, and individuals with sensitive skin. Solar radiation peaks around mid-day, so it's wise to limit exposure to the Sun at this time. Employ a hat with a wide brim for robust protection, cutting UV exposure by half. Take precaution! The reflection from snow can almost double the UV radiation of the Sun.
Frequently asked questions
Is it cold in Witmer during December?
What is the average humidity in December in Witmer?
How many days does it rain in December in Witmer?
How many days does it snow in December in Witmer?
What is the month with the shortest days in Witmer?
What is the average length of the day in December in Witmer?
When is the sunrise / sunset in December in Witmer?
How many hours of sunshine does Witmer have in December?
When is the lowest UV index in Witmer?
How high is the UV index in December in Witmer?
Average temperature in December
Witmer, PA
- Average high temperature in December: 41.9°F
The warmest month (with the highest average high temperature) is July (82.8°F).
The month with the lowest average high temperature is January (35.6°F).
- Average low temperature in December: 30.4°F
The month with the highest average low temperature is July (65.1°F).
The coldest month (with the lowest average low temperature) is January (23°F).
Average pressure in December
Witmer, 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
Witmer, PA
- Average wind speed in December: 8.4mph
The windiest months (with the highest average wind speed) are January, February and March (8.9mph).
The calmest months (with the lowest average wind speed) are July and August (5.2mph).
Average humidity in December
Witmer, PA
- Average humidity in December: 79%
The months with the highest relative humidity are May and October (81%).
The month with the lowest relative humidity is April (76%).
Average rainfall in December
Witmer, PA
- Average rainfall in December: 2.56"
The wettest month (with the highest rainfall) is August (3.62").
The driest month (with the least rainfall) is February (2.2").
Average rainfall days in December
Witmer, PA
- Average rainfall days in December: 10.6 days
The month with the highest number of rainy days is May (17.4 days).
The month with the least rainy days is February (8.8 days).
Average snowfall in December
Witmer, PA
- Average snowfall in December: 1.81"
The month with the highest snowfall is March (4.21").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Witmer, PA
- Average snowfall days in December: 3.7 days
The month with the highest number of snowfall days is January (7.4 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Witmer, 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 30min).
The month with the least sunshine is February (Average sunshine: 4h and 30min).
Average sunshine days in December
Witmer, PA
- Average sunshine days in December: 16.7 days
The month with the most sunshine days is November (17.8 days).
The month with the least sunshine days is May (12 days).
Average UV index in December
Witmer, PA
- Average UV index in December: 2
The months with the highest UV index are May, June and July (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 2).
Average cloud cover in December
Witmer, PA
- Average cloud cover in December: 49
The month with the most cloud cover is February (Cloud cover 50).
The month with the least cloud cover is July (Cloud cover 33).
Average visibility in December
Witmer, 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).
Witmer, Pennsylvania, USA
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