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 average high and low temperatures of 52.7°F (11.5°C) and 42.4°F (5.8°C) respectively, December is Willow Creek's coldest month.Humidity
In December, the average relative humidity in Willow Creek is 78%.Rainfall
December is the month with the most rainfall in Willow Creek. Rain falls for 15.6 days and accumulates 5.87" (149mm) of precipitation.Snowfall
In Willow Creek, snow does not fall in January, March through December.Daylight
The month with the shortest days is December, with an average of 9h and 18min of daylight.On the first day of December in Willow Creek, California, sunrise is at 7:20 am and sunset at 4:47 pm. On the last day of the month, sunrise is at 7:39 am and sunset at 4:56 pm PST.
Sunshine
January and December, with an average of 5.1h of sunshine, are months with the least sunshine.UV index
January through March, November and December, with an average maximum UV index of 3, are months with the lowest UV index in Willow Creek. A UV Index of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV rays for average individuals.Note: In December, the UV index of 3 transforms into the following advice:
Undertake precautions - It is suggested to shield oneself from sunburn. Avoiding the Sun during its peak radiation time around midday is a healthy practice. Limit sun-induced ocular harm with sunglasses that feature UVA and UVB filtration. 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
What part of the year is the coldest in Willow Creek?
What are the temperatures in Willow Creek in December?
What is the average humidity in December in Willow Creek?
What is the rainiest month in Willow Creek?
How many days does it rain in December in Willow Creek?
When it does not snow in Willow Creek?
What is the month with the shortest days in Willow Creek?
How many hours of daylight does Willow Creek have in December?
When is the sunrise / sunset in December in Willow Creek?
What are the months with the least sunshine in Willow Creek?
How many hours of sunshine does Willow Creek have in December?
When is the lowest UV index in Willow Creek?
How high is the UV index in December in Willow Creek?
Average temperature in December
Willow Creek, CA
- Average high temperature in December: 52.7°F
The warmest month (with the highest average high temperature) is August (68.9°F).
The month with the lowest average high temperature is December (52.7°F).
- Average low temperature in December: 42.4°F
The month with the highest average low temperature is August (51.4°F).
The coldest month (with the lowest average low temperature) is February (41.7°F).
Average pressure in December
Willow Creek, CA
- Average pressure in December: 30.11"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is August (29.97"Hg).
Average wind speed in December
Willow Creek, CA
- 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 (5.2mph).
Average humidity in December
Willow Creek, CA
- Average humidity in December: 78%
The month with the highest relative humidity is March (82%).
The months with the lowest relative humidity are September and October (76%).
Average rainfall in December
Willow Creek, CA
- Average rainfall in December: 5.87"
The wettest month (with the highest rainfall) is December (5.87").
The driest month (with the least rainfall) is July (0.08").
Average rainfall days in December
Willow Creek, CA
- Average rainfall days in December: 15.6 days
The month with the highest number of rainy days is March (16.8 days).
The months with the least rainy days are July and August (2.2 days).
Average snowfall in December
Willow Creek, CA
- Average snowfall in December: 0"
The month with the highest snowfall is February (0.39").
The months with the least snowfall are January, March, April, May, June, July, August, September, October, November and December (0").
Average snowfall days in December
Willow Creek, CA
- Average snowfall days in December: 0.1 days
The month with the highest number of snowfall days is February (0.3 days).
The months with the least snowfall days are January, March, April, May, June, July, August, September, October and November (0 days).
Average daylight in December /
Average sunshine in December
Willow Creek, CA
- 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: 5h and 1min
The month with the most sunshine is July (Average sunshine: 11h and 30min).
The months with the least sunshine are January and December (Average sunshine: 5h and 6min).
Average sunshine days in December
Willow Creek, CA
- Average sunshine days in December: 14.7 days
The months with the most sunshine days are July and August (28 days).
The month with the least sunshine days is March (12.5 days).
Average UV index in December
Willow Creek, CA
- Average UV index in December: 3
The months with the highest UV index are June, July and August (UV index 5).
The months with the lowest UV index are January, February, March, November and December (UV index 3).
Average cloud cover in December
Willow Creek, CA
- Average cloud cover in December: 45
The month with the most cloud cover is March (Cloud cover 48).
The months with the least cloud cover are July and August (Cloud cover 18).
Average visibility in December
Willow Creek, CA
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are July and August (5mi).
Willow Creek, California, USA
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