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
December is San Anselmo's coldest month, registering average high temperatures of 55.4°F (13°C) and lows of 45.3°F (7.4°C).Humidity
The average relative humidity in December is 73%.Rainfall
In San Anselmo, during December, the rain falls for 7.2 days and regularly aggregates up to 0.67" (17mm) of precipitation. Throughout the year, there are 48 rainfall days, and 3.94" (100mm) of precipitation is accumulated.Daylight
The month with the shortest days is December, with an average of 9h and 36min of daylight.On the first day of the month, sunrise is at 7:08 am and sunset at 4:51 pm. On the last day of December, sunrise is at 7:26 am and sunset at 5:01 pm PST.
Sunshine
The month with the least sunshine is December, with an average of 5.5h of sunshine.UV index
January, February, November and December, with an average maximum UV index of 3, are months with the lowest UV index in San Anselmo. A UV Index reading of 3 to 5 represents a moderate threat to health from unprotected exposure to Sun's UV rays for ordinary individuals.Note: In December, the average maximum UV index of 3 translates into the following recommendations:
Preventative actions are necessary - The mandate to avoid skin and eye damage is in place. Minimize direct exposure to the Sun during midday when its radiation is at its peak. It's wise to wear UVA and UVB-blocking sunglasses when the sun shines brightly.
Frequently asked questions
What time of the year is the coldest in San Anselmo?
What is the average December temperature in San Anselmo?
What is the average humidity in December in San Anselmo?
How many days does it rain in December in San Anselmo?
What is the month with the shortest days in San Anselmo?
What is the average length of the day in December in San Anselmo?
When are sunrise and sunset in December in San Anselmo?
What is the month with the least sunshine in San Anselmo?
How long on average sun shines in December in San Anselmo?
What is the month with the lowest UV index in San Anselmo?
What is the UV index intensity in December in San Anselmo?
Average temperature in December
San Anselmo, CA
- Average high temperature in December: 55.4°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 (55.4°F).
- Average low temperature in December: 45.3°F
The month with the highest average low temperature is September (56.1°F).
The coldest month (with the lowest average low temperature) is December (45.3°F).
Average pressure in December
San Anselmo, 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
San Anselmo, CA
- Average wind speed in December: 6.2mph
The windiest month (with the highest average wind speed) is May (7.8mph).
The calmest months (with the lowest average wind speed) are October and November (5.5mph).
Average humidity in December
San Anselmo, CA
- Average humidity in December: 73%
The month with the highest relative humidity is March (77%).
The month with the lowest relative humidity is October (68%).
Average rainfall in December
San Anselmo, CA
- Average rainfall in December: 0.67"
The wettest month (with the highest rainfall) is February (0.87").
The driest months (with the least rainfall) are June, July, August and September (0.04").
Average rainfall days in December
San Anselmo, CA
- Average rainfall days in December: 7.2 days
The month with the highest number of rainy days is March (8.8 days).
The months with the least rainy days are June and August (1.2 days).
Average daylight in December /
Average sunshine in December
San Anselmo, CA
- Average daylight in December: 9h and 4min
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 3min
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 30min).
Average sunshine days in December
San Anselmo, CA
- Average sunshine days in December: 22.1 days
The month with the most sunshine days is June (26.4 days).
The month with the least sunshine days is March (20.7 days).
Average UV index in December
San Anselmo, 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
San Anselmo, CA
- Average cloud cover in December: 38
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
San Anselmo, 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 Anselmo, California, USA
Weather forecast for your location
2. Allow the app to use your location
