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 average high-temperature decreases in December, shifting from a chilly 46.2°F (7.9°C) in November to a wintry 36.9°F (2.7°C). An average low-temperature of 26.2°F (-3.2°C) is observed during December nights.Humidity
The months with the highest humidity are February and December, with an average relative humidity of 84%.Rainfall
In Waterville, during December, the rain falls for 15 days and regularly aggregates up to 2.72" (69mm) of precipitation. In Waterville, during the entire year, the rain falls for 181 days and collects up to 33.07" (840mm) of precipitation.Snowfall
Months with snowfall are January through May, October through December. In Waterville, during December, snow falls for 11 days and regularly aggregates up to 4.61" (117mm) of snow. Throughout the year, in Waterville, Pennsylvania, there are 55.8 snowfall days, and 25.63" (651mm) of snow is accumulated.Daylight
The month with the shortest days is December, with an average of 9h and 18min of daylight.On the first day of the month, sunrise is at 7:16 am and sunset at 4:40 pm. On the last day of December, sunrise is at 7:35 am and sunset at 4:50 pm EST.
Sunshine
In December, the average sunshine is 3.7h.UV index
The month with the lowest UV index is December, with an average maximum UV index of 1. A UV Index value of 2, and less, symbolizes a low threat to health from exposure to the Sun's UV rays for the average person.Note: During December, 1 as the daily maximum UV index converts into the following advice:
While most can endure approximately an hour in the sun without burning, children always require protection from sunlight. Avoiding the Sun's peak radiation during midday hours is essential for health and safety. Combat UV radiation's detrimental effects with sun-safe clothing and UV-blocking eyewear. Mind this! Nearly twice the UV radiation from the Sun can be reflected by the snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is it in December?
What are the most humid months?
What is the average humidity in December?
How many days does it rain in December?
How many days does it snow in December?
What is the month with the shortest days?
What is the average length of the day in December?
When are sunrise and sunset in December in Waterville?
How long on average sun shines in December?
What is the month with the lowest UV index?
How high is the UV index in December?
Average temperature in December
Waterville, PA
- Average high temperature in December: 36.9°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 (30.7°F).
- Average low temperature in December: 26.2°F
The month with the highest average low temperature is July (58.6°F).
The coldest month (with the lowest average low temperature) is January (18.7°F).
Average pressure in December
Waterville, PA
- Average pressure in December: 30.09"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
Waterville, PA
- Average wind speed in December: 7mph
The windiest months (with the highest average wind speed) are January and April (7.5mph).
The calmest month (with the lowest average wind speed) is August (4.8mph).
Average humidity in December
Waterville, PA
- Average humidity in December: 84%
The months with the highest relative humidity are February and December (84%).
The months with the lowest relative humidity are April and July (77%).
Average rainfall in December
Waterville, PA
- Average rainfall in December: 2.72"
The wettest month (with the highest rainfall) is April (3.58").
The driest month (with the least rainfall) is November (2.17").
Average rainfall days in December
Waterville, PA
- Average rainfall days in December: 15 days
The month with the highest number of rainy days is May (19 days).
The month with the least rainy days is January (10.8 days).
Average snowfall in December
Waterville, PA
- Average snowfall in December: 4.61"
The month with the highest snowfall is February (7.05").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Waterville, PA
- Average snowfall days in December: 11 days
The month with the highest number of snowfall days is January (15.4 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Waterville, 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: 3h and 4min
The month with the most sunshine is July (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 3h and 36min).
Average sunshine days in December
Waterville, PA
- Average sunshine days in December: 9.9 days
The month with the most sunshine days is September (15 days).
The month with the least sunshine days is February (8.5 days).
Average UV index in December
Waterville, PA
- Average UV index in December: 1
The month with the highest UV index is July (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in December
Waterville, PA
- Average cloud cover in December: 61
The months with the most cloud cover are January, February and December (Cloud cover 61).
The month with the least cloud cover is July (Cloud cover 36).
Average visibility in December
Waterville, PA
- Average visibility in December: 5mi
The months with the highest visibility are January, March, April, May, June, July, August, September, October, November and December (5mi).
The month with the lowest visibility is February (4mi).
Waterville, Pennsylvania, USA
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