December weather forecastBolinas, CA
December
Weather in December
The first month of the winter, December, is still a cool month in Bolinas, California, with an average temperature ranging between min 46°F (7.8°C) and max 55.2°F (12.9°C).Temperature
December stands out as Bolinas's coldest month, with an average high-temperature of 55.2°F (12.9°C) and a low-temperature of 46°F (7.8°C).Humidity
In December, the average relative humidity in Bolinas is 73%.Rainfall
In Bolinas, in December, during 10.9 rainfall days, 2.83" (72mm) of precipitation is typically accumulated. Throughout the year, there are 80.3 rainfall days, and 15.98" (406mm) of precipitation is accumulated.Snowfall
December is the only month when snow falls. December has the most snowfall days of the year in Bolinas. Snow falls for 0.1 days.Ocean temperature
In December, the average ocean temperature is 54.3°F (12.4°C).Note: Engaging in a swim in 54.3°F (12.4°C) can threaten life. Brief exposure to 55.4°F (13°C) waters is uneasy, and submersion below 50°F (10°C) can lead to cold shock and disrupted breathing patterns, varying by individual.
Daylight
The month with the shortest days is December, with an average of 9h and 36min of daylight.On the first day of December, sunrise is at 7:08 am and sunset at 4:51 pm. On the last day of the month, sunrise is at 7:26 am and sunset at 5:01 pm PST.
Sunshine
December has the least sunshine of the year, with an average of 5.6h of sunshine.UV index
The months with the lowest UV index are February, November and December, with an average maximum UV index of 3. A UV Index value of 3 to 5 symbolizes a medium vulnerability from unprotected exposure to Sun's UV rays for the ordinary person.Note: The average daily UV index of 3 in December transforms into the following instructions:
Ensure safety - Recommendations to avert sunburn are presented. Direct Sun exposure should be minimized especially during midday when radiation is most intense. Fend off the sun's harsh rays with appropriate clothing, a wide-brim hat, and UV-protective sunglasses. Take heed! Reflection from the snow can almost amplify the Sun's UV radiation by double.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Bolinas, CA
- Average high temperature in December: 55.2°F
The warmest month (with the highest average high temperature) is September (70.9°F).
The month with the lowest average high temperature is December (55.2°F).
- Average low temperature in December: 46°F
The month with the highest average low temperature is September (56.3°F).
The coldest month (with the lowest average low temperature) is December (46°F).
Average pressure in December
Bolinas, CA
- Average pressure in December: 30.1"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
Bolinas, CA
- Average wind speed in December: 6.7mph
The windiest months (with the highest average wind speed) are April and May (8.3mph).
The calmest month (with the lowest average wind speed) is November (5.9mph).
Average humidity in December
Bolinas, CA
- Average humidity in December: 73%
The month with the highest relative humidity is August (78%).
The month with the lowest relative humidity is October (69%).
Average rainfall in December
Bolinas, CA
- Average rainfall in December: 2.83"
The wettest month (with the highest rainfall) is February (3.43").
The driest months (with the least rainfall) are July and August (0.08").
Average rainfall days in December
Bolinas, CA
- Average rainfall days in December: 10.9 days
The month with the highest number of rainy days is March (12.8 days).
The month with the least rainy days is July (2.3 days).
Average snowfall days in December
Bolinas, CA
- Average snowfall days in December: 0.1 days
The month with the highest number of snowfall days is December (0.1 days).
The months with the least snowfall days are January, February, March, April, May, June, July, August, September, October and November (0 days).
Average sea temperature in December
Bolinas, 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
Bolinas, CA
- Average daylight in December: 9h and 36min
The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 36min).
- Average sunshine in December: 5h and 36min
The month with the most sunshine is July (Average sunshine: 11h and 12min).
The month with the least sunshine is December (Average sunshine: 5h and 36min).
Average sunshine days in December
Bolinas, CA
- Average sunshine days in December: 18.7 days
The months with the most sunshine days are June and July (24.8 days).
The month with the least sunshine days is March (16.6 days).
Average UV index in December
Bolinas, CA
- Average UV index in December: 3
The months with the highest UV index are June, July, August and September (UV index 5).
The months with the lowest UV index are February, November and December (UV index 3).
Average cloud cover in December
Bolinas, CA
- Average cloud cover in December: 37
The month with the most cloud cover is March (Cloud cover 39).
The month with the least cloud cover is September (Cloud cover 19).
Average visibility in December
Bolinas, 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).
