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 sea temperature 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 Moss Beach, California, the lowest average temperatures are observed in December, with a high of 55.6°F (13.1°C) and a low of 48.9°F (9.4°C).Humidity
November and December, with an average relative humidity of 72%, are the least humid months in Moss Beach.Rainfall
In Moss Beach, during December, the rain falls for 8.8 days and regularly aggregates up to 1.1" (28mm) of precipitation. Throughout the year, in Moss Beach, there are 77.3 rainfall days, and 6.81" (173mm) of precipitation is accumulated.Ocean temperature
In December, the average ocean temperature is 54.3°F (12.4°C).Note: Swimming in 54.3°F (12.4°C) feels unbearing at 55.4°F (13°C) and can be life-risking below 50°F (10°C), causing breathing issues and cold shock, depending on a person's capacity.
Daylight
December has the shortest days of the year in Moss Beach, with an average of 9h and 36min of daylight.On the first day of December, sunrise is at 7:06 am and sunset at 4:52 pm. On the last day of the month, sunrise is at 7:24 am and sunset at 5:02 pm PST.
Sunshine
With an average of 5.7h of sunshine, December has the least sunshine of the year.UV index
The months with the lowest UV index are February and December, with an average maximum UV index of 3. A UV Index reading of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV rays for the ordinary person.Note: During December, 3 as the daily maximum UV index converts into the following advice:
Be vigilant - Suggestions to stave off sun damage are provided. Midday is when the Sun's radiation is strongest; avoid prolonged exposure during this time. Clothes that are both tight-knit and comfortably loose are prime choices for sun protection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the coldest month in Moss Beach?
What are December temperatures in Moss Beach?
What are the least humid months in Moss Beach?
What is the average humidity in December in Moss Beach?
How many days does it rain in December in Moss Beach?
What is the ocean temperature in December in Moss Beach?
What is the month with the shortest days in Moss Beach?
How many hours of daylight does Moss Beach have in December?
When is the sunrise / sunset in December in Moss Beach?
What is the month with the least sunshine in Moss Beach?
How many hours of sunshine does Moss Beach have in December?
What is the month with the lowest UV index in Moss Beach?
What is the UV index reading in December in Moss Beach?
Average temperature in December
Moss Beach, CA
- Average high temperature in December: 55.6°F
The warmest month (with the highest average high temperature) is September (67.5°F).
The month with the lowest average high temperature is December (55.6°F).
- Average low temperature in December: 48.9°F
The month with the highest average low temperature is September (56.8°F).
The coldest months (with the lowest average low temperature) are January and February (48.7°F).
Average pressure in December
Moss Beach, CA
- Average pressure in December: 30.1"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is September (29.92"Hg).
Average wind speed in December
Moss Beach, CA
- Average wind speed in December: 8.1mph
The windiest month (with the highest average wind speed) is April (9.4mph).
The calmest months (with the lowest average wind speed) are August and September (6.8mph).
Average humidity in December
Moss Beach, CA
- Average humidity in December: 72%
The month with the highest relative humidity is August (82%).
The months with the lowest relative humidity are November and December (72%).
Average rainfall in December
Moss Beach, CA
- Average rainfall in December: 1.1"
The wettest month (with the highest rainfall) is February (1.34").
The driest months (with the least rainfall) are June, July and September (0.12").
Average rainfall days in December
Moss Beach, CA
- Average rainfall days in December: 8.8 days
The month with the highest number of rainy days is March (10.5 days).
The month with the least rainy days is September (3.6 days).
Average sea temperature in December
Moss Beach, CA
- Average sea temperature in December: 54.3°F
The best month for swimming (with the highest average sea temperature) is September (56.9°F).
The coldest month (with the lowest average sea temperature) is June (52.4°F).
Average daylight in December /
Average sunshine in December
Moss Beach, CA
- Average daylight in December: 9h and 4min
The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 36min).
- Average sunshine in December: 5h and 4min
The month with the most sunshine is July (Average sunshine: 11h and 6min).
The month with the least sunshine is December (Average sunshine: 5h and 42min).
Average sunshine days in December
Moss Beach, CA
- Average sunshine days in December: 20.7 days
The month with the most sunshine days is October (24.5 days).
The month with the least sunshine days is August (18.7 days).
Average UV index in December
Moss Beach, CA
- Average UV index in December: 3
The months with the highest UV index are June, August and September (UV index 5).
The months with the lowest UV index are February and December (UV index 3).
Average cloud cover in December
Moss Beach, CA
- Average cloud cover in December: 36
The month with the most cloud cover is March (Cloud cover 39).
The months with the least cloud cover are September and October (Cloud cover 21).
Average visibility in December
Moss Beach, 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).
Moss Beach, California, USA
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