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
In December, the meteorological conditions alter, with the average high-temperature shifting from a chilly 49.8°F (9.9°C) in November to a wintry 40.1°F (4.5°C). Nighttime temperature in Monongahela experiences an average drop to a freezing cold 28.8°F (-1.8°C) in December.Humidity
The average relative humidity in December is 83%.Rainfall
In Monongahela, in December, during 11.3 rainfall days, 1.5" (38mm) of precipitation is typically accumulated. In Monongahela, during the entire year, the rain falls for 161.6 days and collects up to 20" (508mm) of precipitation.Snowfall
Months with snowfall in Monongahela are January through April, October through December. In Monongahela, Pennsylvania, in December, during 10.9 snowfall days, 1.89" (48mm) of snow is typically accumulated. Throughout the year, there are 49.7 snowfall days, and 9.76" (248mm) of snow is accumulated.Daylight
December has the shortest days of the year in Monongahela, with an average of 9h and 24min of daylight.On the first day of December, sunrise is at 7:23 am and sunset at 4:54 pm. On the last day of the month, sunrise is at 7:42 am and sunset at 5:04 pm EST.
Sunshine
The average sunshine in December is 3.5h.UV index
December is the month with the lowest UV index, with an average maximum UV index of 1. A UV Index reading of 2, and below, represents a minimal health vulnerability from unsafe exposure to UV radiation for the average person.Note: A maximum daily UV index of 1 during December morphs into the following directions:
Most individuals can handle sun exposure for up to an hour without burning, but children must always be shielded from sun exposure. Around midday, solar radiation is most harmful; hence, exposure should be limited. Stay sun-safe with clothing that is both closely woven and worn loosely. Pay attention! The reflection of snow can enhance the Sun's UV radiation almost double.
Frequently asked questions
Is it cold in Monongahela during December?
What is the average humidity in December in Monongahela?
How many days does it rain in December in Monongahela?
How many days does it snow in December in Monongahela?
What is the month with the shortest days in Monongahela?
How many hours of daylight does Monongahela have in December?
When is the sunrise / sunset in December in Monongahela?
How many hours of sunshine does Monongahela have in December?
What is the month with the lowest UV index in Monongahela?
How high is the UV index in December in Monongahela?
Average temperature in December
Monongahela, PA
- Average high temperature in December: 40.1°F
The warmest month (with the highest average high temperature) is July (83.7°F).
The month with the lowest average high temperature is January (34°F).
- Average low temperature in December: 28.8°F
The month with the highest average low temperature is July (62.2°F).
The coldest month (with the lowest average low temperature) is January (21.2°F).
Average pressure in December
Monongahela, PA
- Average pressure in December: 30.11"Hg
The month with the highest atmospheric pressure is November (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.95"Hg).
Average wind speed in December
Monongahela, PA
- Average wind speed in December: 7.1mph
The windiest month (with the highest average wind speed) is January (7.8mph).
The calmest month (with the lowest average wind speed) is August (4.6mph).
Average humidity in December
Monongahela, PA
- Average humidity in December: 83%
The months with the highest relative humidity are January and February (84%).
The months with the lowest relative humidity are April, July and August (76%).
Average rainfall in December
Monongahela, PA
- Average rainfall in December: 1.5"
The wettest month (with the highest rainfall) is May (2.32").
The driest month (with the least rainfall) is January (1.18").
Average rainfall days in December
Monongahela, PA
- Average rainfall days in December: 11.3 days
The month with the highest number of rainy days is May (18.6 days).
The month with the least rainy days is January (9 days).
Average snowfall in December
Monongahela, PA
- Average snowfall in December: 1.89"
The month with the highest snowfall is January (2.44").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
Monongahela, PA
- Average snowfall days in December: 10.9 days
The month with the highest number of snowfall days is January (14 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Monongahela, 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: 3h and 3min
The month with the most sunshine is August (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 3h and 0min).
Average sunshine days in December
Monongahela, PA
- Average sunshine days in December: 12.4 days
The month with the most sunshine days is November (17.6 days).
The month with the least sunshine days is February (9 days).
Average UV index in December
Monongahela, PA
- Average UV index in December: 1
The months with the highest UV index are May, June, July and August (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in December
Monongahela, PA
- Average cloud cover in December: 64
The month with the most cloud cover is January (Cloud cover 68).
The month with the least cloud cover is August (Cloud cover 33).
Average visibility in December
Monongahela, 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).
Monongahela, Pennsylvania, USA
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