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
Setting in of December comes with a decrease in the average high-temperature, moving from a frosty 45.3°F (7.4°C) in November to an icy 35.6°F (2°C). In Guys Mills, December nights witness a steady temperature drop to a subzero cold 26.4°F (-3.1°C).Humidity
The average relative humidity in December is 87%.Rainfall
In Guys Mills, during December, the rain falls for 10.9 days and regularly aggregates up to 3.27" (83mm) of precipitation. Throughout the year, there are 177.7 rainfall days, and 36.85" (936mm) of precipitation is accumulated.Snowfall
January through May, October through December are months with snowfall. The month with the most snowfall is December, when snow falls for 18.3 days and typically aggregates up to 10.87" (276mm) of snow.Daylight
December has the shortest days of the year, with an average of 9h and 12min of daylight.On the first day of December, sunrise is at 7:27 am and sunset at 4:50 pm. On the last day of the month, sunrise is at 7:46 am and sunset at 4:59 pm EST.
Sunshine
The average sunshine in December is 2.4h.UV index
The months with the lowest UV index are February and December, with an average maximum UV index of 1. A UV Index of 2, and less, symbolizes a low threat to health from unprotected exposure to Sun's UV rays for ordinary individuals.Note: In December, a daily maximum UV index of 1 leads to the following instructions:
Extended sun exposure is not an issue for the majority. Children, infants, and fair-skinned individuals always need to be protected. The intensity of the Sun's UV radiation during midday suggests reducing time spent outdoors. On days when the sun blazes, arm yourself with sunglasses that block UVA and UVB radiation. 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?
What is the snowiest month?
How much does it snow in Guys Mills in December?
What is the month with the shortest days?
How many hours of daylight does Guys Mills have in December?
When is the sunrise / sunset in December?
How long on average sun shines in December?
When is the lowest UV index?
What is the UV index intensity in December?
Average temperature in December
Guys Mills, PA
- Average high temperature in December: 35.6°F
The warmest month (with the highest average high temperature) is July (78.3°F).
The month with the lowest average high temperature is January (29.5°F).
- Average low temperature in December: 26.4°F
The month with the highest average low temperature is July (59.7°F).
The coldest month (with the lowest average low temperature) is January (18.1°F).
Average pressure in December
Guys Mills, PA
- Average pressure in December: 30.08"Hg
The month with the highest atmospheric pressure is November (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in December
Guys Mills, PA
- Average wind speed in December: 9.1mph
The windiest month (with the highest average wind speed) is January (9.6mph).
The calmest month (with the lowest average wind speed) is July (5.8mph).
Average humidity in December
Guys Mills, PA
- Average humidity in December: 87%
The month with the highest relative humidity is February (90%).
The months with the lowest relative humidity are April and May (80%).
Average rainfall in December
Guys Mills, PA
- Average rainfall in December: 3.27"
The wettest month (with the highest rainfall) is April (3.62").
The driest month (with the least rainfall) is September (2.4").
Average rainfall days in December
Guys Mills, PA
- Average rainfall days in December: 10.9 days
The months with the highest number of rainy days are June and July (18.8 days).
The month with the least rainy days is January (8.2 days).
Average snowfall in December
Guys Mills, PA
- Average snowfall in December: 10.87"
The month with the highest snowfall is December (10.87").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Guys Mills, PA
- Average snowfall days in December: 18.3 days
The month with the highest number of snowfall days is January (21.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Guys Mills, PA
- Average daylight in December: 9h and 1min
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 12min).
- Average sunshine in December: 2h and 2min
The month with the most sunshine is July (Average sunshine: 10h and 0min).
The month with the least sunshine is January (Average sunshine: 2h and 12min).
Average sunshine days in December
Guys Mills, PA
- Average sunshine days in December: 5.8 days
The month with the most sunshine days is September (11.6 days).
The month with the least sunshine days is January (5.1 days).
Average UV index in December
Guys Mills, 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 February and December (UV index 1).
Average cloud cover in December
Guys Mills, PA
- Average cloud cover in December: 75
The month with the most cloud cover is January (Cloud cover 79).
The months with the least cloud cover are July and August (Cloud cover 34).
Average visibility in December
Guys Mills, PA
- Average visibility in December: 4mi
The months with the highest visibility are April and October (6mi).
The months with the lowest visibility are January, February and December (4mi).
Guys Mills, Pennsylvania, USA
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