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
December implies a gentle temperature shift, with average high-temperatures reducing from November's chilly 49.1°F (9.5°C) to a cold 39.4°F (4.1°C). December sees the temperature falling to a mean low of 28.2°F (-2.1°C).Humidity
In December, the average relative humidity is 84%.Rainfall
In Monroeville, in December, it is raining for 9.3 days, with typically 1.54" (39mm) of accumulated precipitation. In Monroeville, during the entire year, the rain falls for 151 days and collects up to 20.39" (518mm) of precipitation.Snowfall
January through May, October through December are months with snowfall in Monroeville. In December, in Monroeville, Pennsylvania, it is snowing for 6.2 days. Throughout December, 1.81" (46mm) of snow is accumulated. In Monroeville, during the entire year, snow falls for 35.4 days and aggregates up to 10.35" (263mm) of snow.Daylight
With an average of 9h and 18min of daylight, December has the shortest days of the year.On the first day of the month, sunrise is at 7:23 am and sunset at 4:53 pm. On the last day of December, sunrise is at 7:42 am and sunset at 5:02 pm EST.
Sunshine
In Monroeville, the average sunshine in December is 3.3h.UV index
With an average maximum UV index of 1, December is the month with the lowest UV index in Monroeville. A UV Index of 2, and less, symbolizes a low threat to health from unprotected exposure to Sun's UV rays for the average person.Note: The maximum daily UV index of 1 during December translates into the following directions:
Children must always have sun protection, unlike most people, who can tolerate up to an hour in the sun without any burns. The midday Sun can be dangerous due to its intense radiation; always find shade and reduce exposure. Sunglasses that guard against UVA and UVB rays are pivotal in minimizing sun-induced ocular damage. Notice! The UV radiation of the Sun can be intensified nearly twofold due to the reflective quality of snow.
Frequently asked questions
How cold does it get in Monroeville in December?
What is the average humidity in December in Monroeville?
How much does it rain in Monroeville in December?
How many days does it snow in December in Monroeville?
What is the month with the shortest days in Monroeville?
How many hours of daylight does Monroeville have in December?
When is the sunrise / sunset in December in Monroeville?
How many hours of sunshine does Monroeville have in December?
What is the month with the lowest UV index in Monroeville?
How high is the UV index in December in Monroeville?
Average temperature in December
Monroeville, PA
- Average high temperature in December: 39.4°F
The warmest month (with the highest average high temperature) is July (83.1°F).
The month with the lowest average high temperature is January (33.1°F).
- Average low temperature in December: 28.2°F
The month with the highest average low temperature is July (61.3°F).
The coldest month (with the lowest average low temperature) is January (20.7°F).
Average pressure in December
Monroeville, PA
- Average pressure in December: 30.11"Hg
The month with the highest atmospheric pressure is November (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.95"Hg).
Average wind speed in December
Monroeville, PA
- Average wind speed in December: 7.5mph
The windiest month (with the highest average wind speed) is January (8.1mph).
The calmest month (with the lowest average wind speed) is August (4.7mph).
Average humidity in December
Monroeville, PA
- Average humidity in December: 84%
The month with the highest relative humidity is February (85%).
The months with the lowest relative humidity are April, July and August (76%).
Average rainfall in December
Monroeville, PA
- Average rainfall in December: 1.54"
The wettest month (with the highest rainfall) is May (2.56").
The driest month (with the least rainfall) is November (1.06").
Average rainfall days in December
Monroeville, PA
- Average rainfall days in December: 9.3 days
The month with the highest number of rainy days is May (18.2 days).
The month with the least rainy days is January (7.7 days).
Average snowfall in December
Monroeville, PA
- Average snowfall in December: 1.81"
The month with the highest snowfall is February (2.52").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Monroeville, PA
- Average snowfall days in December: 6.2 days
The month with the highest number of snowfall days is January (9.7 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Monroeville, 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 18min).
- Average sunshine in December: 3h and 2min
The month with the most sunshine is August (Average sunshine: 10h and 12min).
The month with the least sunshine is January (Average sunshine: 2h and 54min).
Average sunshine days in December
Monroeville, PA
- Average sunshine days in December: 17.1 days
The month with the most sunshine days is November (19.6 days).
The month with the least sunshine days is May (10.1 days).
Average UV index in December
Monroeville, PA
- Average UV index in December: 1
The months with the highest UV index are June, July and August (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in December
Monroeville, PA
- Average cloud cover in December: 65
The month with the most cloud cover is January (Cloud cover 69).
The month with the least cloud cover is August (Cloud cover 33).
Average visibility in December
Monroeville, PA
- Average visibility in December: 5mi
The months with the highest visibility are April, June, August and November (6mi).
The months with the lowest visibility are January, February, March, May, July, September, October and December (5mi).
Monroeville, Pennsylvania, USA
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