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 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
San Carlos's coldest weather arrives in December, when temperatures average a high of 55.9°F (13.3°C) and a low of 46.2°F (7.9°C).Humidity
In December, the average relative humidity in San Carlos, California, is 71%.Rainfall
In San Carlos, California, in December, during 11 rainfall days, 1.89" (48mm) of precipitation is typically accumulated. Throughout the year, in San Carlos, there are 77.5 rainfall days, and 11.22" (285mm) of precipitation is accumulated.Daylight
The month with the shortest days in San Carlos is December, with an average of 9h and 36min of daylight.On the first day of December in San Carlos, sunrise is at 7:05 am and sunset at 4:51 pm. On the last day of the month, sunrise is at 7:23 am and sunset at 5:01 pm PST.
Sunshine
December has the least sunshine of the year, with an average of 5.8h of sunshine.UV index
February, November and December, with an average maximum UV index of 3, are months with the lowest UV index in San Carlos. A UV Index reading of 3 to 5 represents a moderate threat to health from unprotected exposure to Sun's UV rays for average individuals.Note: A typical high UV index of 3 in December suggests the following recommendations:
Act with care - Obligation to protect against skin and eye damage is highlighted. The mid-day Sun emits the most powerful UV radiation, so seek shade and minimize exposure. For minimizing sun-related eye damage, always choose sunglasses with UVA and UVB coverage.
Frequently asked questions
What is the coldest time of year in San Carlos?
What is the usual temperature for San Carlos in December?
What is the average humidity in December in San Carlos?
How much does it rain in San Carlos in December?
What is the month with the shortest days in San Carlos?
What is the average length of the day in December in San Carlos?
When are sunrise and sunset in December in San Carlos?
What is the month with the least sunshine in San Carlos?
How long on average sun shines in December in San Carlos?
What is the month with the lowest UV index in San Carlos?
What is the UV index reading in December in San Carlos?
Average temperature in December
San Carlos, CA
- Average high temperature in December: 55.9°F
The warmest month (with the highest average high temperature) is August (73°F).
The month with the lowest average high temperature is December (55.9°F).
- Average low temperature in December: 46.2°F
The month with the highest average low temperature is September (56.7°F).
The coldest month (with the lowest average low temperature) is January (46°F).
Average pressure in December
San Carlos, CA
- Average pressure in December: 30.11"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
San Carlos, CA
- Average wind speed in December: 6.4mph
The windiest month (with the highest average wind speed) is April (7.5mph).
The calmest month (with the lowest average wind speed) is October (5.5mph).
Average humidity in December
San Carlos, CA
- Average humidity in December: 71%
The month with the highest relative humidity is March (75%).
The month with the lowest relative humidity is October (68%).
Average rainfall in December
San Carlos, CA
- Average rainfall in December: 1.89"
The wettest month (with the highest rainfall) is February (2.09").
The driest months (with the least rainfall) are July and August (0.08").
Average rainfall days in December
San Carlos, CA
- Average rainfall days in December: 11 days
The month with the highest number of rainy days is March (13 days).
The month with the least rainy days is July (1.8 days).
Average daylight in December /
Average sunshine in December
San Carlos, 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 5min
The month with the most sunshine is July (Average sunshine: 12h and 0min).
The month with the least sunshine is December (Average sunshine: 5h and 48min).
Average sunshine days in December
San Carlos, CA
- Average sunshine days in December: 19.3 days
The month with the most sunshine days is July (25.3 days).
The month with the least sunshine days is March (16.3 days).
Average UV index in December
San Carlos, 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
San Carlos, CA
- Average cloud cover in December: 34
The month with the most cloud cover is March (Cloud cover 35).
The month with the least cloud cover is July (Cloud cover 9).
Average visibility in December
San Carlos, 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).
San Carlos, California, USA
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