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
Transition into December marks a drop in the average high-temperature, moving from a chilly 46.2°F (7.9°C) in November to a wintry 36.5°F (2.5°C). The low-temperature in Heilwood averages to a freezing cold 26.4°F (-3.1°C) during the nights of December.Humidity
In December, the average relative humidity in Heilwood is 85%.Rainfall
In Heilwood, in December, during 7.2 rainfall days, 0.94" (24mm) of precipitation is typically accumulated. Throughout the year, in Heilwood, Pennsylvania, there are 121.6 rainfall days, and 10.75" (273mm) of precipitation is accumulated.Snowfall
January through May, October through December are months with snowfall in Heilwood, Pennsylvania. In Heilwood, in December, snow falls for 9.2 days, with typically accumulated 2.01" (51mm) of snow. In Heilwood, during the entire year, snow falls for 49.1 days and aggregates up to 10.43" (265mm) of snow.Daylight
The month with the shortest days in Heilwood is December, with an average of 9h and 18min of daylight.On the first day of the month, sunrise is at 7:20 am and sunset at 4:49 pm. On the last day of December, in Heilwood, sunrise is at 7:39 am and sunset at 4:58 pm EST.
Sunshine
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 Heilwood, Pennsylvania. A UV Index of 2, and less, symbolizes a minimal health vulnerability from unprotected exposure to Sun's UV rays for average individuals.Note: A maximum high daily UV index of 1 during December translates into the following directions:
Babies, children, and individuals with sensitive skin should always have protection against extended sun exposure. The best time to avoid the Sun's harmful UV radiation is during midday when it's most potent. Boost your sun resistance with garments that are densely woven yet spacious. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.
Frequently asked questions
How cold is December in Heilwood?
What is the average humidity in December in Heilwood?
How much does it rain in Heilwood in December?
How many days does it snow in December in Heilwood?
What is the month with the shortest days in Heilwood?
What is the average length of the day in December in Heilwood?
When is the sunrise / sunset in December in Heilwood?
How many hours of sunshine does Heilwood have in December?
When is the lowest UV index in Heilwood?
What is the UV index reading in December in Heilwood?
Average temperature in December
Heilwood, PA
- Average high temperature in December: 36.5°F
The warmest month (with the highest average high temperature) is July (80.2°F).
The month with the lowest average high temperature is January (30.4°F).
- Average low temperature in December: 26.4°F
The month with the highest average low temperature is July (58.8°F).
The coldest month (with the lowest average low temperature) is January (18.5°F).
Average pressure in December
Heilwood, 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 (29.95"Hg).
Average wind speed in December
Heilwood, PA
- Average wind speed in December: 9.2mph
The windiest month (with the highest average wind speed) is January (9.8mph).
The calmest month (with the lowest average wind speed) is August (5.3mph).
Average humidity in December
Heilwood, PA
- Average humidity in December: 85%
The month with the highest relative humidity is February (87%).
The months with the lowest relative humidity are April, June, July and August (78%).
Average rainfall in December
Heilwood, PA
- Average rainfall in December: 0.94"
The wettest month (with the highest rainfall) is May (1.26").
The driest month (with the least rainfall) is September (0.55").
Average rainfall days in December
Heilwood, PA
- Average rainfall days in December: 7.2 days
The month with the highest number of rainy days is May (15.6 days).
The month with the least rainy days is January (5.8 days).
Average snowfall in December
Heilwood, PA
- Average snowfall in December: 2.01"
The month with the highest snowfall is January (2.64").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Heilwood, PA
- Average snowfall days in December: 9.2 days
The month with the highest number of snowfall days is January (12.7 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Heilwood, 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 July (Average sunshine: 9h and 54min).
The month with the least sunshine is January (Average sunshine: 2h and 54min).
Average sunshine days in December
Heilwood, PA
- Average sunshine days in December: 17.6 days
The month with the most sunshine days is November (19.9 days).
The month with the least sunshine days is May (12.3 days).
Average UV index in December
Heilwood, PA
- Average UV index in December: 1
The months with the highest UV index are May, June, July and August (UV index 5).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in December
Heilwood, PA
- Average cloud cover in December: 68
The month with the most cloud cover is January (Cloud cover 72).
The month with the least cloud cover is August (Cloud cover 38).
Average visibility in December
Heilwood, PA
- Average visibility in December: 5mi
The month with the highest visibility is April (6mi).
The months with the lowest visibility are January, February, March, May, June, July, August, September, October, November and December (5mi).
Heilwood, Pennsylvania, USA
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