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
The arrival of December signals a shift in temperature, down from a chilly 46.2°F (7.9°C) in November to a cold 36.9°F (2.7°C). An average low-temperature of 25.9°F (-3.4°C) is anticipated throughout the nights in Folstown during December.Humidity
In December, the average relative humidity is 83%.Rainfall
In December, in Folstown, the rain falls for 10.3 days. Throughout December, 2.2" (56mm) of precipitation is accumulated. In Folstown, during the entire year, the rain falls for 162.5 days and collects up to 30.35" (771mm) of precipitation.Snowfall
January through May, October through December are months with snowfall. In Folstown, during December, snow falls for 7.8 days and regularly aggregates up to 3.5" (89mm) of snow. In Folstown, during the entire year, snow falls for 41.1 days and aggregates up to 21.38" (543mm) of snow.Daylight
The month with the shortest days is December, with an average of 9h and 18min of daylight.On the first day of December in Folstown, Pennsylvania, sunrise is at 7:10 am and sunset at 4:36 pm. On the last day of the month, sunrise is at 7:29 am and sunset at 4:45 pm EST.
Sunshine
The average sunshine in December in Folstown, Pennsylvania, is 3.8h.UV index
The month with the lowest UV index is December, with an average maximum UV index of 1. A UV Index reading of 2, and below, represents a minimal health hazard from unprotected exposure to Sun's UV rays for average individuals.Note: In December, the maximum UV index of 1 suggests this advice:
Although the majority can endure up to an hour in the sun without burns, children always require sun protection. Avoiding direct sun during mid-day hours can prevent harmful UV radiation exposure. A wide-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun. Be watchful! The reflection of snow can enhance the intensity of the Sun's UV radiation nearly double.
Frequently asked questions
How cold is December in Folstown?
What is the average humidity in December in Folstown?
How much does it rain in Folstown in December?
How many days does it snow in December in Folstown?
What is the month with the shortest days in Folstown?
How many hours of daylight does Folstown have in December?
When is the sunrise / sunset in December in Folstown?
How long on average sun shines in December in Folstown?
What is the month with the lowest UV index in Folstown?
What is the UV index intensity in December in Folstown?
Average temperature in December
Folstown, PA
- Average high temperature in December: 36.9°F
The warmest month (with the highest average high temperature) is July (81°F).
The month with the lowest average high temperature is January (30.6°F).
- Average low temperature in December: 25.9°F
The month with the highest average low temperature is July (59°F).
The coldest month (with the lowest average low temperature) is January (18.5°F).
Average pressure in December
Folstown, 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
Folstown, PA
- Average wind speed in December: 7.6mph
The windiest months (with the highest average wind speed) are March and April (8.1mph).
The calmest month (with the lowest average wind speed) is August (5.1mph).
Average humidity in December
Folstown, PA
- Average humidity in December: 83%
The month with the highest relative humidity is February (84%).
The months with the lowest relative humidity are April and July (78%).
Average rainfall in December
Folstown, PA
- Average rainfall in December: 2.2"
The wettest month (with the highest rainfall) is July (3.23").
The driest months (with the least rainfall) are January and September (2.09").
Average rainfall days in December
Folstown, PA
- Average rainfall days in December: 10.3 days
The month with the highest number of rainy days is May (19.1 days).
The month with the least rainy days is February (8.2 days).
Average snowfall in December
Folstown, PA
- Average snowfall in December: 3.5"
The month with the highest snowfall is February (6.42").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Folstown, PA
- Average snowfall days in December: 7.8 days
The month with the highest number of snowfall days is January (11.7 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Folstown, 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 6min).
The months with the least sunshine are January and February (Average sunshine: 3h and 42min).
Average sunshine days in December
Folstown, PA
- Average sunshine days in December: 15.4 days
The month with the most sunshine days is November (17.5 days).
The month with the least sunshine days is July (9.1 days).
Average UV index in December
Folstown, 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
Folstown, PA
- Average cloud cover in December: 60
The month with the most cloud cover is February (Cloud cover 61).
The month with the least cloud cover is July (Cloud cover 37).
Average visibility in December
Folstown, 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).
Folstown, Pennsylvania, USA
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