December weather forecastLos Osos, CA
December
Weather in December
The first month of the winter, December, is still a mild month in Los Osos, California, with an average temperature fluctuating between 48°F (8.9°C) and 59.2°F (15.1°C).Temperature
December is the coldest month, with an average high-temperature of 59.2°F (15.1°C) and an average low-temperature of 48°F (8.9°C).Humidity
In December, the average relative humidity in Los Osos is 66%.Rainfall
In Los Osos, California, in December, it is raining for 7.3 days, with typically 1.38" (35mm) of accumulated precipitation. Throughout the year, there are 53.7 rainfall days, and 8.58" (218mm) of precipitation is accumulated.Daylight
December has the shortest days of the year in Los Osos, with an average of 9h and 48min of daylight.On the first day of December in Los Osos, sunrise is at 6:54 am and sunset at 4:50 pm. On the last day of the month, sunrise is at 7:11 am and sunset at 5:01 pm PST.
Sunshine
December has the least sunshine of the year in Los Osos, California, with an average of 6.4h of sunshine.UV index
The months with the lowest UV index in Los Osos are January through April, November and December, with an average maximum UV index of 4. A UV Index value of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV radiation for average individuals.Note: An average maximum UV index of 4 in December leads to these recommendations:
Put precautions into practice - Guidance to elude sunburn is provided. Sun exposure should be minimized, especially during midday, to avoid harmful UV radiation. To mitigate harm from sun exposure, pick sunglasses offering UVA and UVB defense.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Los Osos, CA
- Average high temperature in December: 59.2°F
The warmest month (with the highest average high temperature) is September (76.3°F).
The month with the lowest average high temperature is December (59.2°F).
- Average low temperature in December: 48°F
The month with the highest average low temperature is September (59.9°F).
The coldest month (with the lowest average low temperature) is February (47.3°F).
Average pressure in December
Los Osos, CA
- Average pressure in December: 30.1"Hg
The month with the highest atmospheric pressure is January (30.12"Hg).
The months with the lowest atmospheric pressure are June and September (29.91"Hg).
Average wind speed in December
Los Osos, CA
- Average wind speed in December: 6.8mph
The windiest month (with the highest average wind speed) is May (7.9mph).
The calmest months (with the lowest average wind speed) are August and September (6mph).
Average humidity in December
Los Osos, CA
- Average humidity in December: 66%
The month with the highest relative humidity is March (70%).
The months with the lowest relative humidity are September and October (61%).
Average rainfall in December
Los Osos, CA
- Average rainfall in December: 1.38"
The wettest month (with the highest rainfall) is January (1.81").
The driest month (with the least rainfall) is August (0.04").
Average rainfall days in December
Los Osos, CA
- Average rainfall days in December: 7.3 days
The month with the highest number of rainy days is March (10.3 days).
The month with the least rainy days is August (0.7 days).
Average daylight in December /
Average sunshine in December
Los Osos, CA
- Average daylight in December: 9h and 48min
The month with the longest days is June (Average daylight: 14h and 30min).
The month with the shortest days is December (Average daylight: 9h and 48min).
- Average sunshine in December: 6h and 24min
The month with the most sunshine is July (Average sunshine: 12h and 0min).
The month with the least sunshine is December (Average sunshine: 6h and 24min).
Average sunshine days in December
Los Osos, CA
- Average sunshine days in December: 22.5 days
The month with the most sunshine days is August (28.8 days).
The month with the least sunshine days is February (20.1 days).
Average UV index in December
Los Osos, CA
- Average UV index in December: 4
The month with the highest UV index is August (UV index 6).
The months with the lowest UV index are January, February, March, April, November and December (UV index 4).
Average cloud cover in December
Los Osos, CA
- Average cloud cover in December: 26
The month with the most cloud cover is March (Cloud cover 28).
The months with the least cloud cover are August and September (Cloud cover 7).
Average visibility in December
Los Osos, 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).
