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
During Plymouth Meeting's transition into December, the average high-temperature lessens, moving from a cool 51.6°F (10.9°C) in November to a wintry 42.6°F (5.9°C). Throughout the month of December, Plymouth Meeting expects an average low of 30.9°F (-0.6°C).Humidity
In Plymouth Meeting, the average relative humidity in December is 78%.Rainfall
In Plymouth Meeting, during December, the rain falls for 8.6 days and regularly aggregates up to 1.22" (31mm) of precipitation. Throughout the year, in Plymouth Meeting, Pennsylvania, there are 138.2 rainfall days, and 15.59" (396mm) of precipitation is accumulated.Snowfall
Months with snowfall in Plymouth Meeting, Pennsylvania, are January through March, May and December. December is the first month it typically snows in Plymouth Meeting, Pennsylvania. Throughout December, in the average 2.6 snowfall days, it receives 0.35" (9mm) of snow. Throughout the year, there are 15.8 snowfall days, and 2.13" (54mm) of snow is accumulated.Daylight
December has the shortest days of the year in Plymouth Meeting, with an average of 9h and 24min of daylight.On the first day of December, sunrise is at 7:04 am and sunset at 4:36 pm. On the last day of the month, sunrise is at 7:23 am and sunset at 4:45 pm EST.
Sunshine
In December, the average sunshine in Plymouth Meeting is 5h.UV index
The months with the lowest UV index in Plymouth Meeting are January through March, November and December, with an average maximum UV index of 2. A UV Index of 2, and less, symbolizes a low threat to health from exposure to the Sun's UV radiation for ordinary individuals.Note: The daily high UV index of 2 in December translates into this advice:
Infants, children, and people with sensitive skin should always have protection against lengthy periods of sun exposure. The Sun's UV radiation is especially harmful around midday, so reduce exposure and stay safe. By wearing a generously brimmed hat, you can cut UV radiation exposure significantly. Bear in mind! The Sun's UV radiation can nearly double in intensity due to the reflective quality of snow.
Frequently asked questions
How cold is December in Plymouth Meeting?
What is the average humidity in December in Plymouth Meeting?
How much does it rain in Plymouth Meeting in December?
When does it start to snow in Plymouth Meeting?
What is the month with the shortest days in Plymouth Meeting?
How many hours of daylight does Plymouth Meeting have in December?
What time are sunrise and sunset in December in Plymouth Meeting?
How long on average sun shines in December in Plymouth Meeting?
What is the month with the lowest UV index in Plymouth Meeting?
What is the UV index reading in December in Plymouth Meeting?
Average temperature in December
Plymouth Meeting, PA
- Average high temperature in December: 42.6°F
The warmest month (with the highest average high temperature) is July (85.6°F).
The month with the lowest average high temperature is January (36.7°F).
- Average low temperature in December: 30.9°F
The month with the highest average low temperature is July (67.5°F).
The coldest month (with the lowest average low temperature) is January (24.3°F).
Average pressure in December
Plymouth Meeting, 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
Plymouth Meeting, PA
- Average wind speed in December: 7.5mph
The windiest month (with the highest average wind speed) is March (8.3mph).
The calmest months (with the lowest average wind speed) are July and August (5.3mph).
Average humidity in December
Plymouth Meeting, PA
- Average humidity in December: 78%
The months with the highest relative humidity are February and October (79%).
The months with the lowest relative humidity are April and July (72%).
Average rainfall in December
Plymouth Meeting, PA
- Average rainfall in December: 1.22"
The wettest month (with the highest rainfall) is July (1.89").
The driest month (with the least rainfall) is February (0.91").
Average rainfall days in December
Plymouth Meeting, PA
- Average rainfall days in December: 8.6 days
The month with the highest number of rainy days is May (16 days).
The month with the least rainy days is November (7.4 days).
Average snowfall in December
Plymouth Meeting, PA
- Average snowfall in December: 0.35"
The months with the highest snowfall are February and March (0.55").
The months with the least snowfall are April, June, July, August, September, October and November (0").
Average snowfall days in December
Plymouth Meeting, PA
- Average snowfall days in December: 2.6 days
The month with the highest number of snowfall days is January (5.2 days).
The months with the least snowfall days are April, June, July, August, September and October (0 days).
Average daylight in December /
Average sunshine in December
Plymouth Meeting, 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: 5h and 0min
The month with the most sunshine is July (Average sunshine: 10h and 42min).
The month with the least sunshine is February (Average sunshine: 4h and 48min).
Average sunshine days in December
Plymouth Meeting, PA
- Average sunshine days in December: 19.9 days
The month with the most sunshine days is November (20.5 days).
The months with the least sunshine days are May and June (12.8 days).
Average UV index in December
Plymouth Meeting, PA
- Average UV index in December: 2
The months with the highest UV index are May, June, July and August (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
Plymouth Meeting, PA
- Average cloud cover in December: 47
The month with the most cloud cover is February (Cloud cover 48).
The month with the least cloud cover is July (Cloud cover 32).
Average visibility in December
Plymouth Meeting, PA
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, June, July, August, October, November and December (6mi).
The months with the lowest visibility are May and September (5mi).
Plymouth Meeting, Pennsylvania, USA
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