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 transition into December indicates a reduction in the average high-temperature, down to a wintry 39.4°F (4.1°C) from November's frosty 48.6°F (9.2°C). Willow Lake records an average nighttime low-temperature of 28.2°F (-2.1°C) throughout December.Humidity
The average relative humidity in December is 81%.Rainfall
In December, the rain falls for 10.5 days. Throughout December, 1.57" (40mm) of precipitation is accumulated. Throughout the year, there are 145.2 rainfall days, and 21.1" (536mm) of precipitation is accumulated.Snowfall
Months with snowfall in Willow Lake, Pennsylvania, are January through May, October through December. In Willow Lake, Pennsylvania, in December, during 5.4 snowfall days, 1.38" (35mm) of snow is typically accumulated. Throughout the year, there are 28.1 snowfall days, and 8.94" (227mm) of snow is accumulated.Daylight
With an average of 9h and 18min of daylight, December has the shortest days of the year in Willow Lake.On the first day of December, sunrise is at 7:09 am and sunset at 4:38 pm. On the last day of the month, sunrise is at 7:28 am and sunset at 4:47 pm EST.
Sunshine
The months with the least sunshine are January, February and December, with an average of 4.5h of sunshine.UV index
The months with the lowest UV index in Willow Lake are January through March, November and December, with an average maximum UV index of 2. A UV Index of 2, and less, symbolizes a minimal health vulnerability from exposure to the Sun's UV rays for the average person.Note: The UV index of 2 during December translates into the following guidance:
The majority are not significantly affected by prolonged sun exposure. Infants, children, and those with fair skin must always have protection. Avoiding direct sunlight during midday hours helps reduce the risk from intense UV radiation. Employ a wide-brim hat for potent defense against up to 50% of UV rays. Foresee this! The reflection from snow can nearly double the intensity of UV radiation from the Sun.
Frequently asked questions
Is it cold in Willow Lake during December?
What is the average humidity in December in Willow Lake?
How many days does it rain in December in Willow Lake?
How many days does it snow in December in Willow Lake?
What is the month with the shortest days in Willow Lake?
How many hours of daylight does Willow Lake have in December?
When are sunrise and sunset in December in Willow Lake?
What is the month with the least sunshine in Willow Lake?
How long on average sun shines in December in Willow Lake?
What are the months with the lowest UV index in Willow Lake?
What is the UV index reading in December in Willow Lake?
Average temperature in December
Willow Lake, PA
- Average high temperature in December: 39.4°F
The warmest month (with the highest average high temperature) is July (81.9°F).
The month with the lowest average high temperature is January (33.4°F).
- Average low temperature in December: 28.2°F
The month with the highest average low temperature is July (62.1°F).
The coldest month (with the lowest average low temperature) is January (20.7°F).
Average pressure in December
Willow Lake, 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
Willow Lake, PA
- Average wind speed in December: 7.7mph
The windiest month (with the highest average wind speed) is March (8.4mph).
The calmest month (with the lowest average wind speed) is August (4.8mph).
Average humidity in December
Willow Lake, 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
Willow Lake, PA
- Average rainfall in December: 1.57"
The wettest month (with the highest rainfall) is August (2.44").
The driest month (with the least rainfall) is September (1.26").
Average rainfall days in December
Willow Lake, PA
- Average rainfall days in December: 10.5 days
The month with the highest number of rainy days is May (15.6 days).
The month with the least rainy days is January (7 days).
Average snowfall in December
Willow Lake, PA
- Average snowfall in December: 1.38"
The month with the highest snowfall is January (2.36").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Willow Lake, PA
- Average snowfall days in December: 5.4 days
The month with the highest number of snowfall days is January (7.4 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Willow Lake, 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: 4h and 3min
The month with the most sunshine is July (Average sunshine: 10h and 24min).
The months with the least sunshine are January, February and December (Average sunshine: 4h and 30min).
Average sunshine days in December
Willow Lake, PA
- Average sunshine days in December: 16.8 days
The month with the most sunshine days is January (18.8 days).
The month with the least sunshine days is May (11.8 days).
Average UV index in December
Willow Lake, PA
- Average UV index in December: 2
The month with the highest UV index is July (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
Willow Lake, PA
- Average cloud cover in December: 52
The months with the most cloud cover are February and December (Cloud cover 52).
The month with the least cloud cover is July (Cloud cover 32).
Average visibility in December
Willow Lake, PA
- Average visibility in December: 5mi
The months with the highest visibility are January, March, April, June, July and November (6mi).
The months with the lowest visibility are February, May, August, September, October and December (5mi).
Willow Lake, Pennsylvania, USA
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