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 onset of December entails a temperature shift, as the average high-temperature decreases from a frosty 47.8°F (8.8°C) in November to an icy 38.8°F (3.8°C). During the month of December, the temperature falls to an average of 28°F (-2.2°C).Humidity
In Marshallton, the average relative humidity in December is 81%.Rainfall
In December, the rain falls for 4 days. Throughout December, 0.47" (12mm) of precipitation is accumulated. In Marshallton, during the entire year, the rain falls for 78.5 days and collects up to 6.57" (167mm) of precipitation.Snowfall
January through April, November and December are months with snowfall in Marshallton. In Marshallton, in December, snow falls for 3.3 days, with typically accumulated 0.16" (4mm) of snow. Throughout the year, there are 17.5 snowfall days, and 1.77" (45mm) of snow is accumulated.Daylight
With an average of 9h and 18min of daylight, December has the shortest days of the year.On the first day of December in Marshallton, sunrise is at 7:11 am and sunset at 4:39 pm. On the last day of the month, sunrise is at 7:30 am and sunset at 4:48 pm EST.
Sunshine
In Marshallton, the average sunshine in December is 4.3h.UV index
The months with the lowest UV index are January through March, November and December, with an average maximum UV index of 2. A UV Index reading of 2, and below, represents a low threat to health from exposure to the Sun's UV rays for the average person.Note: In December, a daily maximum UV index of 2 leads to the following instructions:
Most individuals can handle sun exposure for up to an hour without burning, but children must always be shielded from sun exposure. Solar radiation is at its peak intensity during midday, so it's advisable to stay indoors or in the shade. Employ a hat with a wide brim for robust protection, cutting UV exposure by half. Be advised! The UV radiation from the Sun can be almost doubled due to the reflective properties of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold does it get in December?
What is the average humidity in December?
How many days does it rain in December?
How much does it snow in December?
What is the month with the shortest days?
How many hours of daylight does Marshallton have in December?
When are sunrise and sunset in December?
How many hours of sunshine does Marshallton have in December?
When is the lowest UV index?
What is the UV index reading in December?
Average temperature in December
Marshallton, PA
- Average high temperature in December: 38.8°F
The warmest month (with the highest average high temperature) is July (81.5°F).
The month with the lowest average high temperature is January (32.2°F).
- Average low temperature in December: 28°F
The month with the highest average low temperature is July (61.2°F).
The coldest month (with the lowest average low temperature) is January (20.1°F).
Average pressure in December
Marshallton, PA
- Average pressure in December: 30.1"Hg
The month with the highest atmospheric pressure is November (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed in December
Marshallton, PA
- Average wind speed in December: 7.5mph
The windiest month (with the highest average wind speed) is March (8.3mph).
The calmest month (with the lowest average wind speed) is August (4.7mph).
Average humidity in December
Marshallton, PA
- Average humidity in December: 81%
The month with the highest relative humidity is February (82%).
The months with the lowest relative humidity are March and April (77%).
Average rainfall in December
Marshallton, PA
- Average rainfall in December: 0.47"
The wettest month (with the highest rainfall) is July (0.79").
The driest month (with the least rainfall) is September (0.24").
Average rainfall days in December
Marshallton, PA
- Average rainfall days in December: 4 days
The month with the highest number of rainy days is July (10.4 days).
The month with the least rainy days is November (3.2 days).
Average snowfall in December
Marshallton, PA
- Average snowfall in December: 0.16"
The months with the highest snowfall are January, February and March (0.43").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in December
Marshallton, PA
- Average snowfall days in December: 3.3 days
The month with the highest number of snowfall days is January (5.7 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Marshallton, 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: 4h and 2min
The month with the most sunshine is July (Average sunshine: 10h and 24min).
The months with the least sunshine are January and February (Average sunshine: 4h and 12min).
Average sunshine days in December
Marshallton, PA
- Average sunshine days in December: 23.6 days
The month with the most sunshine days is January (24.4 days).
The month with the least sunshine days is July (16.5 days).
Average UV index in December
Marshallton, PA
- Average UV index in December: 2
The month with the highest UV index is June (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
Marshallton, PA
- Average cloud cover in December: 54
The month with the most cloud cover is February (Cloud cover 55).
The month with the least cloud cover is July (Cloud cover 32).
Average visibility in December
Marshallton, PA
- Average visibility in December: 6mi
The months with the highest visibility are January, March, April, November and December (6mi).
The months with the lowest visibility are February, May, June, July, August, September and October (5mi).
Marshallton, Pennsylvania, USA
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