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 Shasta Lake, December is the month with the lowest recorded average temperatures, measuring a high of 49.3°F (9.6°C) and a low of 35.2°F (1.8°C).Humidity
In Shasta Lake, California, the average relative humidity in December is 73%.Rainfall
In Shasta Lake, in December, during 13.9 rainfall days, 4.69" (119mm) of precipitation is typically accumulated. In Shasta Lake, during the entire year, the rain falls for 99.5 days and collects up to 30.43" (773mm) of precipitation.Snowfall
Months with snowfall are January through March, November and December. The month with the most snowfall is December, when snow falls for 0.8 days and typically aggregates up to 0.63" (16mm) of snow.Daylight
December has the shortest days of the year, with an average of 9h and 18min of daylight.On the first day of the month, sunrise is at 7:14 am and sunset at 4:42 pm. On the last day of December, in Shasta Lake, sunrise is at 7:33 am and sunset at 4:52 pm PST.
Sunshine
The month with the least sunshine in Shasta Lake is December, with an average of 5.5h of sunshine.UV index
The months with the lowest UV index in Shasta Lake are February, November and December, with an average maximum UV index of 2. A UV Index estimate of 2, and below, represents a low health risk from exposure to the Sun's UV rays for the ordinary person.Note: The maximum UV index of 2 during December leads to these instructions:
Despite most people tolerating extended sun exposure, it is critical to always protect those with sensitive skin, infants, and children. Midday is when the Sun's radiation is strongest; avoid prolonged exposure during this time. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Note well! The intensity of the Sun's UV rays can be nearly doubled by snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the coldest months in Shasta Lake?
What are the temperatures in Shasta Lake in December?
What is the average humidity in December in Shasta Lake?
How many days does it rain in December in Shasta Lake?
What is the snowiest month in Shasta Lake?
How many days does it snow in December in Shasta Lake?
What is the month with the shortest days in Shasta Lake?
What is the average length of the day in December in Shasta Lake?
When is the sunrise / sunset in December in Shasta Lake?
What is the month with the least sunshine in Shasta Lake?
How long on average sun shines in December in Shasta Lake?
What is the month with the lowest UV index in Shasta Lake?
What is the UV index intensity in December in Shasta Lake?
Average temperature in December
Shasta Lake, CA
- Average high temperature in December: 49.3°F
The warmest month (with the highest average high temperature) is July (92.3°F).
The month with the lowest average high temperature is December (49.3°F).
- Average low temperature in December: 35.2°F
The month with the highest average low temperature is July (61.3°F).
The coldest month (with the lowest average low temperature) is December (35.2°F).
Average pressure in December
Shasta Lake, CA
- Average pressure in December: 30.14"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The months with the lowest atmospheric pressure are June and August (29.92"Hg).
Average wind speed in December
Shasta Lake, CA
- Average wind speed in December: 4.5mph
The windiest months (with the highest average wind speed) are March, April, June and October (5.2mph).
The calmest months (with the lowest average wind speed) are August and November (4.4mph).
Average humidity in December
Shasta Lake, CA
- Average humidity in December: 73%
The month with the highest relative humidity is March (76%).
The month with the lowest relative humidity is August (35%).
Average rainfall in December
Shasta Lake, CA
- Average rainfall in December: 4.69"
The wettest month (with the highest rainfall) is March (5.91").
The driest month (with the least rainfall) is July (0.08").
Average rainfall days in December
Shasta Lake, CA
- Average rainfall days in December: 13.9 days
The month with the highest number of rainy days is March (16.8 days).
The month with the least rainy days is August (1.6 days).
Average snowfall in December
Shasta Lake, CA
- Average snowfall in December: 0.63"
The month with the highest snowfall is December (0.63").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in December
Shasta Lake, CA
- Average snowfall days in December: 0.8 days
The month with the highest number of snowfall days is February (1.1 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average daylight in December /
Average sunshine in December
Shasta Lake, CA
- Average daylight in December: 9h and 2min
The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in December: 5h and 3min
The month with the most sunshine is July (Average sunshine: 12h and 12min).
The month with the least sunshine is December (Average sunshine: 5h and 30min).
Average sunshine days in December
Shasta Lake, CA
- Average sunshine days in December: 16 days
The month with the most sunshine days is August (27.3 days).
The month with the least sunshine days is March (12.7 days).
Average UV index in December
Shasta Lake, CA
- Average UV index in December: 2
The month with the highest UV index is July (UV index 7).
The months with the lowest UV index are February, November and December (UV index 2).
Average cloud cover in December
Shasta Lake, CA
- Average cloud cover in December: 40
The month with the most cloud cover is March (Cloud cover 43).
The months with the least cloud cover are July and August (Cloud cover 5).
Average visibility in December
Shasta Lake, CA
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Shasta Lake, California, USA
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