December weather forecastSausalito, CA
December
Weather in December
The first month of the winter, December, is also a fresh month in Sausalito, California, with an average temperature fluctuating between 55.2°F (12.9°C) and 46.2°F (7.9°C).Temperature
Sausalito's December weather, with an average high temperature of 55.2°F (12.9°C) and an average low temperature of 46.2°F (7.9°C), tends to be the coldest of the year.Humidity
In Sausalito, the average relative humidity in December is 72%.Rainfall
In Sausalito, California, during December, the rain falls for 9 days and regularly aggregates up to 0.79" (20mm) of precipitation. In Sausalito, during the entire year, the rain falls for 64.2 days and collects up to 4.8" (122mm) of precipitation.Ocean temperature
In Sausalito, the average seawater temperature in December is 54.5°F (12.5°C).Note: Without suitable protection, venturing into 54.5°F (12.5°C) waters cooler than 50°F (10°C) can lead to pronounced cold shock and rapid breaths.
Daylight
December has the shortest days of the year in Sausalito, with an average of 9h and 36min of daylight.On the first day of the month, sunrise is at 7:07 am and sunset at 4:51 pm. On the last day of December, sunrise is at 7:25 am and sunset at 5:01 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 January, February, November and December, with an average maximum UV index of 3. A UV Index of 3 to 5 symbolizes a moderate health risk from unsafe exposure to UV radiation for the average person.Note: An average maximum UV index of 3 in December leads to these recommendations:
Be careful. Light complexion individuals might get burns in fewer than 30 minutes. UV radiation from the Sun is most dangerous during midday; take precautions and seek shade. Loose clothes with a tight weave are optimal for safeguarding yourself against the Sun's rays.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Sausalito, CA
- Average high temperature in December: 55.2°F
The warmest month (with the highest average high temperature) is September (72.3°F).
The month with the lowest average high temperature is December (55.2°F).
- Average low temperature in December: 46.2°F
The month with the highest average low temperature is September (56.5°F).
The coldest months (with the lowest average low temperature) are January and December (46.2°F).
Average pressure in December
Sausalito, CA
- Average pressure in December: 30.11"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The months with the lowest atmospheric pressure are June, August and September (29.92"Hg).
Average wind speed in December
Sausalito, CA
- Average wind speed in December: 6.4mph
The windiest month (with the highest average wind speed) is May (7.9mph).
The calmest months (with the lowest average wind speed) are October and November (5.7mph).
Average humidity in December
Sausalito, CA
- Average humidity in December: 72%
The months with the highest relative humidity are March and August (76%).
The month with the lowest relative humidity is October (68%).
Average rainfall in December
Sausalito, CA
- Average rainfall in December: 0.79"
The wettest month (with the highest rainfall) is February (0.98").
The driest months (with the least rainfall) are June, July, August and September (0.08").
Average rainfall days in December
Sausalito, CA
- Average rainfall days in December: 9 days
The month with the highest number of rainy days is March (10.5 days).
The month with the least rainy days is June (1.9 days).
Average sea temperature in December
Sausalito, CA
- Average sea temperature in December: 54.5°F
The best month for swimming (with the highest average sea temperature) is September (57.3°F).
The coldest months (with the lowest average sea temperature) are April and June (53°F).
Average daylight in December /
Average sunshine in December
Sausalito, CA
- Average daylight in December: 9h and 36min
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 42min
The month with the most sunshine is July (Average sunshine: 11h and 24min).
The month with the least sunshine is December (Average sunshine: 5h and 42min).
Average sunshine days in December
Sausalito, CA
- Average sunshine days in December: 20.9 days
The month with the most sunshine days is October (25 days).
The month with the least sunshine days is March (18.4 days).
Average UV index in December
Sausalito, CA
- Average UV index in December: 3
The months with the highest UV index are April, June, July, August and September (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 3).
Average cloud cover in December
Sausalito, CA
- Average cloud cover in December: 36
The month with the most cloud cover is March (Cloud cover 38).
The month with the least cloud cover is September (Cloud cover 18).
Average visibility in December
Sausalito, 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).
