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
December is Montara's coldest month, registering average high temperatures of 55.6°F (13.1°C) and lows of 48.9°F (9.4°C).Humidity
November and December, with an average relative humidity of 72%, are the least humid months.Rainfall
In December, the rain falls for 8.8 days. Throughout December, 1.1" (28mm) of precipitation is accumulated. In Montara, during the entire year, the rain falls for 77.3 days and collects up to 6.81" (173mm) of precipitation.Ocean temperature
In Montara, the average seawater temperature in December is 54.3°F (12.4°C).Note: Staying in 54.3°F (12.4°C) waters for just a few moments at 55.4°F (13°C) can be harrowing, and below 50°F (10°C) poses breathing and cold shock risks, depending on individual tolerance.
Daylight
December has the shortest days of the year in Montara, with an average of 9h and 36min of daylight.On the first day of December in Montara, 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
February and December, with an average maximum UV index of 3, are months with the lowest UV index in Montara. A UV Index reading of 3 to 5 represents a medium health hazard from exposure to the Sun's UV radiation for the ordinary person.Note: During December, 3 as the daily maximum UV index converts into the following advice:
Undertake protective steps - Preventing sun damage is advised. The Sun's most harmful UV rays are emitted around midday; avoid staying outdoors for long during this time. During bright days, sunglasses that offer UVA and UVB defense are recommended.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What month is the coldest in Montara?
What are December temperatures in Montara?
What is the least humid month in Montara?
What is the average humidity in December in Montara?
How many days does it rain in December in Montara?
How cold is the water in December in Montara?
What is the month with the shortest days in Montara?
What is the average length of the day in December in Montara?
When is the sunrise / sunset in December in Montara?
What is the month with the least sunshine in Montara?
How many hours of sunshine does Montara have in December?
When is the lowest UV index in Montara?
How high is the UV index in December in Montara?
Average temperature in December
Montara, 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
Montara, 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
Montara, 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
Montara, 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
Montara, 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
Montara, 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
Montara, 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
Montara, 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
Montara, 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
Montara, 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
Montara, 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
Montara, 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).
Montara, California, USA
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