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 month of December sees the lowest average temperatures, reaching 41.5°F (5.3°C) at the peak and 26.6°F (-3°C) at the low.Humidity
In December, the average relative humidity is 81%.Rainfall
The month with the most rainfall is December, when the rain falls for 12.8 days and typically aggregates up to 2.99" (76mm) of precipitation.Snowfall
Months with snowfall are January through April, October through December. In December, in Yreka, it is snowing for 6.1 days. Throughout December, 4.13" (105mm) of snow is accumulated. Throughout the year, in Yreka, there are 30.9 snowfall days, and 20.47" (520mm) of snow is accumulated.Daylight
The month with the shortest days is December, with an average of 9h and 12min of daylight.On the first day of December, sunrise is at 7:18 am and sunset at 4:40 pm. On the last day of the month, sunrise is at 7:37 am and sunset at 4:50 pm PST.
Sunshine
January and December, with an average of 5.7h of sunshine, are months with the least sunshine.UV index
The months with the lowest UV index are January through March, November and December, with an average maximum UV index of 2. A UV Index estimate of 2, and below, represents a low threat to health from unprotected exposure to Sun's UV rays for the average person.Note: The maximum daily UV index of 2 during December translates into the following directions:
While most people are not greatly affected by extended sun exposure, those with fair skin, babies, and children must always have protection. Being exposed to the midday Sun can have harmful effects due to strong UV radiation; always take precautions. Using UVA and UVB-protective sunglasses and sun-protective clothing is effective against UV radiation. Be mindful! The reflection from snow can increase the Sun's UV radiation nearly twice.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the coldest time of year?
Is it cold during December?
What is the average humidity in December?
What is the wettest month?
How much does it rain in December?
How many days does it snow in December?
What is the month with the shortest days?
How many hours of daylight does Yreka have in December?
What time are sunrise and sunset in December?
What are the months with the least sunshine?
How long on average sun shines in December?
What is the month with the lowest UV index?
What is the UV index reading in December?
Average temperature in December
Yreka, CA
- Average high temperature in December: 41.5°F
The warmest months (with the highest average high temperature) are July and August (84.2°F).
The month with the lowest average high temperature is December (41.5°F).
- Average low temperature in December: 26.6°F
The month with the highest average low temperature is August (50.2°F).
The coldest month (with the lowest average low temperature) is December (26.6°F).
Average pressure in December
Yreka, CA
- 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 (29.96"Hg).
Average wind speed in December
Yreka, CA
- Average wind speed in December: 4.8mph
The windiest month (with the highest average wind speed) is March (5.4mph).
The calmest month (with the lowest average wind speed) is August (3.6mph).
Average humidity in December
Yreka, CA
- Average humidity in December: 81%
The month with the highest relative humidity is January (82%).
The month with the lowest relative humidity is August (52%).
Average rainfall in December
Yreka, CA
- Average rainfall in December: 2.99"
The wettest month (with the highest rainfall) is December (2.99").
The driest month (with the least rainfall) is July (0.16").
Average rainfall days in December
Yreka, CA
- Average rainfall days in December: 12.8 days
The month with the highest number of rainy days is March (16.7 days).
The month with the least rainy days is July (3.2 days).
Average snowfall in December
Yreka, CA
- Average snowfall in December: 4.13"
The month with the highest snowfall is February (5.39").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
Yreka, CA
- Average snowfall days in December: 6.1 days
The month with the highest number of snowfall days is February (7.4 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Yreka, CA
- Average daylight in December: 9h and 1min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in December: 5h and 4min
The month with the most sunshine is July (Average sunshine: 12h and 6min).
The months with the least sunshine are January and December (Average sunshine: 5h and 42min).
Average sunshine days in December
Yreka, CA
- Average sunshine days in December: 14.4 days
The month with the most sunshine days is August (25.7 days).
The month with the least sunshine days is March (11 days).
Average UV index in December
Yreka, CA
- 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, November and December (UV index 2).
Average cloud cover in December
Yreka, CA
- Average cloud cover in December: 43
The months with the most cloud cover are March and December (Cloud cover 43).
The month with the least cloud cover is August (Cloud cover 8).
Average visibility in December
Yreka, CA
- Average visibility in December: 5mi
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, March, November and December (5mi).
Yreka, California, USA
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