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
With its high average temperature of 30.2°F (-1°C) and a low of 19°F (-7.2°C), December is regarded as the coldest month.Humidity
In Chelan Falls, the average relative humidity in December is 88%.Rainfall
December is the month with the most rainfall in Chelan Falls. Rain falls for 7.5 days and accumulates 1.65" (42mm) of precipitation.Snowfall
Months with snowfall are January through April, September through December. December is the month with the most snowfall. Snow falls for 11.9 days and accumulates 9.06" (230mm) of snow.Daylight
The month with the shortest days in Chelan Falls, Washington, is December, with an average of 8h and 30min of daylight.On the first day of the month, sunrise is at 7:28 am and sunset at 4:09 pm. On the last day of December, sunrise is at 7:48 am and sunset at 4:17 pm PST.
Sunshine
In December, the average sunshine is 4.5h.UV index
January through March, October through December, with an average maximum UV index of 2, are months with the lowest UV index in Chelan Falls, Washington. A UV Index of 2, and less, symbolizes a minimal health hazard from unprotected exposure to Sun's UV rays for the ordinary person.Note: In December, the UV index of 2 transforms into the following advice:
Extended time in the sun generally does not harm most, but those with sensitive skin, infants, and children should always be protected. Considering the Sun's intensity during midday, it's wise to minimize direct exposure. Always opt for UVA and UVB-resistant sunglasses on radiant days. Take heed! Reflection from the snow can almost amplify the Sun's UV radiation by double.
Frequently asked questions
What is the coldest time of year in Chelan Falls?
How cold is it in Chelan Falls in December?
What is the average humidity in December in Chelan Falls?
What is the wettest month in Chelan Falls?
How much does it rain in Chelan Falls in December?
When does it snow the most in Chelan Falls?
How much does it snow in Chelan Falls in December?
What is the month with the shortest days in Chelan Falls?
What is the average length of the day in December in Chelan Falls?
What time are sunrise and sunset in December in Chelan Falls?
How long on average sun shines in December in Chelan Falls?
What are the months with the lowest UV index in Chelan Falls?
What is the UV index intensity in December in Chelan Falls?
Average temperature in December
Chelan Falls, 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
Chelan Falls, 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
Chelan Falls, 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
Chelan Falls, 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
Chelan Falls, 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
Chelan Falls, 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
Chelan Falls, 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
Chelan Falls, 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
Chelan Falls, 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
Chelan Falls, 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
Chelan Falls, 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
Chelan Falls, 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
Chelan Falls, 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).
Chelan Falls, Washington, USA
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