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 Waterville, December records the lowest average temperatures, peaking at 30.2°F (-1°C) and reaching a low of 19°F (-7.2°C).Humidity
In December, the average relative humidity in Waterville is 88%.Rainfall
The month with the most rainfall in Waterville, Washington, is December, when the rain falls for 7.5 days and typically aggregates up to 1.65" (42mm) of precipitation.Snowfall
Months with snowfall are January through April, September through December. The month with the most snowfall is December, when snow falls for 11.9 days and typically aggregates up to 9.06" (230mm) of snow.Daylight
With an average of 8h and 30min of daylight, December has the shortest days of the year.On the first day of the month, sunrise is at 7:28 am and sunset at 4:10 pm. On the last day of December, in Waterville, sunrise is at 7:48 am and sunset at 4:18 pm PST.
Sunshine
In December, the average sunshine in Waterville is 4.5h.UV index
The months with the lowest UV index in Waterville are January through March, October through December, with an average maximum UV index of 2. A UV Index estimate of 2, and below, represents a minimal health vulnerability from unprotected exposure to Sun's UV rays for the ordinary person.Note: The UV index of 2 in December translates into these instructions:
While extended sun exposure does not significantly affect most people, those with sensitive skin, children, and infants should always be protected. Limiting sun exposure during midday hours helps in reducing the harmful effects of UV radiation. Combat UV radiation's detrimental effects with sun-safe clothing and UV-blocking eyewear. Heed this! Snow reflection can almost augment the UV radiation of the sun by double.
Frequently asked questions
What are the coldest months in Waterville?
How cold is it in Waterville in December?
What is the average humidity in December in Waterville?
What is the wettest month in Waterville?
How much does it rain in Waterville in December?
What is the snowiest month in Waterville?
How many days does it snow in December in Waterville?
What is the month with the shortest days in Waterville?
What is the average length of the day in December in Waterville?
When is the sunrise / sunset in December in Waterville?
How many hours of sunshine does Waterville have in December?
What is the month with the lowest UV index in Waterville?
How high is the UV index in December in Waterville?
Average temperature in December
Waterville, WA
- Average high temperature in December: 30.2°F
The warmest month (with the highest average high temperature) is July (82.2°F).
The month with the lowest average high temperature is December (30.2°F).
- Average low temperature in December: 19°F
The month with the highest average low temperature is August (55.8°F).
The coldest months (with the lowest average low temperature) are January and December (19°F).
Average pressure in December
Waterville, WA
- Average pressure in December: 30.14"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is August (29.93"Hg).
Average wind speed in December
Waterville, WA
- Average wind speed in December: 3.5mph
The windiest month (with the highest average wind speed) is June (6.1mph).
The calmest months (with the lowest average wind speed) are January and December (3.5mph).
Average humidity in December
Waterville, WA
- Average humidity in December: 88%
The month with the highest relative humidity is January (90%).
The months with the lowest relative humidity are July and August (43%).
Average rainfall in December
Waterville, WA
- Average rainfall in December: 1.65"
The wettest month (with the highest rainfall) is December (1.65").
The driest month (with the least rainfall) is July (0.16").
Average rainfall days in December
Waterville, WA
- Average rainfall days in December: 7.5 days
The month with the highest number of rainy days is March (12.8 days).
The month with the least rainy days is August (3.8 days).
Average snowfall in December
Waterville, WA
- Average snowfall in December: 9.06"
The month with the highest snowfall is December (9.06").
The months with the least snowfall are May, June, July and August (0").
Average snowfall days in December
Waterville, WA
- Average snowfall days in December: 11.9 days
The month with the highest number of snowfall days is January (12 days).
The months with the least snowfall days are May, June, July and August (0 days).
Average daylight in December /
Average sunshine in December
Waterville, WA
- Average daylight in December: 8h and 3min
The month with the longest days is June (Average daylight: 15h and 54min).
The month with the shortest days is December (Average daylight: 8h and 30min).
- Average sunshine in December: 4h and 3min
The months with the most sunshine are July and August (Average sunshine: 12h and 0min).
The month with the least sunshine is January (Average sunshine: 4h and 6min).
Average sunshine days in December
Waterville, WA
- Average sunshine days in December: 15.2 days
The month with the most sunshine days is July (25.7 days).
The month with the least sunshine days is March (13.2 days).
Average UV index in December
Waterville, WA
- 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, October, November and December (UV index 2).
Average cloud cover in December
Waterville, WA
- Average cloud cover in December: 52
The month with the most cloud cover is January (Cloud cover 54).
The months with the least cloud cover are July and August (Cloud cover 12).
Average visibility in December
Waterville, WA
- Average visibility in December: 4mi
The months with the highest visibility are April, May, June, July, August, September and October (6mi).
The months with the lowest visibility are January, February and December (4mi).
Waterville, Washington, USA
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