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
A moderate decline in the average high-temperature is seen during December, decreasing from a cool 50.9°F (10.5°C) in November to a cold 41.9°F (5.5°C). An average low-temperature of 30.4°F (-0.9°C) is observed during December nights in Winterstown.Humidity
In Winterstown, the average relative humidity in December is 79%.Rainfall
In Winterstown, in December, during 8.7 rainfall days, 1.61" (41mm) of precipitation is typically accumulated. In Winterstown, Pennsylvania, during the entire year, the rain falls for 139.8 days and collects up to 22.95" (583mm) of precipitation.Snowfall
Months with snowfall in Winterstown are January through May, October through December. In Winterstown, in December, during 3 snowfall days, 1.22" (31mm) of snow is typically accumulated. In Winterstown, during the entire year, snow falls for 18.4 days and aggregates up to 9.13" (232mm) of snow.Daylight
With an average of 9h and 24min of daylight, December has the shortest days of the year in Winterstown, Pennsylvania.On the first day of the month, sunrise is at 7:09 am and sunset at 4:42 pm. On the last day of December, in Winterstown, sunrise is at 7:27 am and sunset at 4:51 pm EST.
Sunshine
In Winterstown, the average sunshine in December is 4.9h.UV index
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index reading of 2, and below, represents a low health risk from unprotected exposure to Sun's UV rays for the average person.Note: In December, the maximum UV index of 2 transforms into these recommendations:
While most individuals can withstand prolonged sun exposure, it is imperative that babies, children, and those with sensitive skin always be shielded. When the Sun is at its strongest around midday, find shade and limit exposure. Boost your sun resistance with garments that are densely woven yet spacious. Be aware! The intensity of the Sun's UV radiation can be amplified nearly twice due to snow reflection.
Frequently asked questions
Is December cold in Winterstown?
What is the average humidity in December in Winterstown?
How much does it rain in Winterstown in December?
How many days does it snow in December in Winterstown?
What is the month with the shortest days in Winterstown?
How many hours of daylight does Winterstown have in December?
When is the sunrise / sunset in December in Winterstown?
How long on average sun shines in December in Winterstown?
What are the months with the lowest UV index in Winterstown?
How high is the UV index in December in Winterstown?
Average temperature in December
Winterstown, PA
- Average high temperature in December: 41.9°F
The warmest month (with the highest average high temperature) is July (83.5°F).
The month with the lowest average high temperature is January (35.8°F).
- Average low temperature in December: 30.4°F
The month with the highest average low temperature is July (65.5°F).
The coldest month (with the lowest average low temperature) is January (23.4°F).
Average pressure in December
Winterstown, 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 (29.94"Hg).
Average wind speed in December
Winterstown, PA
- Average wind speed in December: 8.2mph
The windiest month (with the highest average wind speed) is March (8.9mph).
The calmest month (with the lowest average wind speed) is August (5.1mph).
Average humidity in December
Winterstown, PA
- Average humidity in December: 79%
The month with the highest relative humidity is May (81%).
The months with the lowest relative humidity are March, April and November (76%).
Average rainfall in December
Winterstown, PA
- Average rainfall in December: 1.61"
The wettest month (with the highest rainfall) is August (2.8").
The driest month (with the least rainfall) is February (1.26").
Average rainfall days in December
Winterstown, PA
- Average rainfall days in December: 8.7 days
The month with the highest number of rainy days is May (15.9 days).
The month with the least rainy days is January (6.3 days).
Average snowfall in December
Winterstown, PA
- Average snowfall in December: 1.22"
The month with the highest snowfall is March (3.23").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Winterstown, PA
- Average snowfall days in December: 3 days
The month with the highest number of snowfall days is February (5 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Winterstown, PA
- Average daylight in December: 9h and 2min
The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in December: 4h and 5min
The month with the most sunshine is July (Average sunshine: 10h and 36min).
The month with the least sunshine is February (Average sunshine: 4h and 42min).
Average sunshine days in December
Winterstown, PA
- Average sunshine days in December: 18.6 days
The month with the most sunshine days is January (20.4 days).
The month with the least sunshine days is May (11.7 days).
Average UV index in December
Winterstown, 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, November and December (UV index 2).
Average cloud cover in December
Winterstown, PA
- Average cloud cover in December: 47
The months with the most cloud cover are February and March (Cloud cover 48).
The month with the least cloud cover is July (Cloud cover 31).
Average visibility in December
Winterstown, 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).
Winterstown, Pennsylvania, USA
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