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
In West Willow, entering December brings a temperature decrement, reducing from November's fresh 51.3°F (10.7°C) to a cold 42.1°F (5.6°C). West Willow encounters a steady low-temperature average of 30°F (-1.1°C) throughout the month of December.Humidity
In December, the average relative humidity is 79%.Rainfall
In West Willow, in December, it is raining for 10.7 days, with typically 2.09" (53mm) of accumulated precipitation. Throughout the year, there are 153.4 rainfall days, and 28.27" (718mm) of precipitation is accumulated.Snowfall
January through April, November and December are months with snowfall. In December, in West Willow, it is snowing for 3.5 days. Throughout December, 1.22" (31mm) of snow is accumulated. In West Willow, Pennsylvania, during the entire year, snow falls for 20.8 days and aggregates up to 11.46" (291mm) of snow.Daylight
December has the shortest days of the year, with an average of 9h and 24min of daylight.On the first day of the month, sunrise is at 7:08 am and sunset at 4:40 pm. On the last day of December, in West Willow, sunrise is at 7:26 am and sunset at 4:50 pm EST.
Sunshine
In December, the average sunshine is 4.7h.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 estimate of 2, and below, represents a low threat to health from exposure to the Sun's UV radiation for the ordinary person.Note: The maximum daily UV index of 2 in December interprets into the following recommendations:
While most people are not greatly affected by extended sun exposure, those with fair skin, babies, and children must always have protection. The Sun's radiation is especially intense around midday; try to stay in shade during this period. A wide-brimmed hat is a shield, deflecting up to 50% of harmful UV radiation from eyes. Attention! Nearly twice the Sun's UV radiation can be reflected by snow.
Frequently asked questions
How cold does it get in West Willow in December?
What is the average humidity in December in West Willow?
How much does it rain in West Willow in December?
How much does it snow in West Willow in December?
What is the month with the shortest days in West Willow?
How many hours of daylight does West Willow have in December?
What time are sunrise and sunset in December in West Willow?
How many hours of sunshine does West Willow have in December?
When is the lowest UV index in West Willow?
What is the UV index reading in December in West Willow?
Average temperature in December
West Willow, PA
- Average high temperature in December: 42.1°F
The warmest month (with the highest average high temperature) is July (82.9°F).
The month with the lowest average high temperature is January (35.4°F).
- Average low temperature in December: 30°F
The month with the highest average low temperature is July (64.8°F).
The coldest month (with the lowest average low temperature) is January (23.2°F).
Average pressure in December
West Willow, 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
West Willow, PA
- Average wind speed in December: 8.4mph
The windiest month (with the highest average wind speed) is March (9mph).
The calmest month (with the lowest average wind speed) is August (5.1mph).
Average humidity in December
West Willow, PA
- Average humidity in December: 79%
The month with the highest relative humidity is May (81%).
The month with the lowest relative humidity is April (76%).
Average rainfall in December
West Willow, PA
- Average rainfall in December: 2.09"
The wettest month (with the highest rainfall) is August (3.35").
The driest months (with the least rainfall) are February and September (1.89").
Average rainfall days in December
West Willow, PA
- Average rainfall days in December: 10.7 days
The month with the highest number of rainy days is May (17.8 days).
The month with the least rainy days is February (8 days).
Average snowfall in December
West Willow, PA
- Average snowfall in December: 1.22"
The month with the highest snowfall is March (3.66").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in December
West Willow, PA
- Average snowfall days in December: 3.5 days
The month with the highest number of snowfall days is January (6.8 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in December /
Average sunshine in December
West Willow, 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: 4h and 4min
The month with the most sunshine is July (Average sunshine: 10h and 24min).
The month with the least sunshine is February (Average sunshine: 4h and 30min).
Average sunshine days in December
West Willow, PA
- Average sunshine days in December: 17.1 days
The month with the most sunshine days is November (19.4 days).
The month with the least sunshine days is May (11.3 days).
Average UV index in December
West Willow, PA
- Average UV index in December: 2
The months with the highest UV index are May, June and July (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in December
West Willow, PA
- Average cloud cover in December: 49
The month with the most cloud cover is February (Cloud cover 50).
The month with the least cloud cover is July (Cloud cover 33).
Average visibility in December
West Willow, PA
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, June, July, October, November and December (6mi).
The months with the lowest visibility are May, August and September (5mi).
West Willow, Pennsylvania, USA
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