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 sea temperature 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
In Pinole, December records the lowest average temperatures, peaking at 55.4°F (13°C) and reaching a low of 43.9°F (6.6°C).Humidity
In Pinole, the average relative humidity in December is 71%.Rainfall
In Pinole, in December, during 10.4 rainfall days, 2.13" (54mm) of precipitation is typically accumulated. Throughout the year, there are 72.2 rainfall days, and 12.83" (326mm) of precipitation is accumulated.Ocean temperature
In Pinole, the average seawater temperature in December is 54.1°F (12.3°C).Note: Danger awaits those who swim in 54.1°F (12.3°C) without protection. Falling below 50°F (10°C) means intense cold shock and hyperventilation.
Daylight
With an average of 9h and 36min of daylight, December has the shortest days of the year in Pinole, California.On the first day of the month, sunrise is at 7:07 am and sunset at 4:49 pm. On the last day of December, in Pinole, sunrise is at 7:25 am and sunset at 5:00 pm PST.
Sunshine
December has the least sunshine of the year, with an average of 5.7h of sunshine.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 value of 3 to 5 symbolizes a medium health hazard from unsafe exposure to UV radiation for the average person.Note: The daily high UV index of 3 in December translates into this advice:
Make use of precautions - It is urged to ward off sun damage. Direct exposure to the Sun during its peak hours around mid-day should be minimized for safety. For minimizing sun-related eye damage, always choose sunglasses with UVA and UVB coverage.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What time of the year is the coldest?
What is the temperature in December?
What is the average humidity in December?
How much does it rain in December?
How cold is the water in December?
What is the month with the shortest days?
What is the average length of the day in December?
When are sunrise and sunset in December?
What is the month with the least sunshine?
How many hours of sunshine does Pinole have in December?
What is the month with the lowest UV index?
What is the UV index intensity in December?
Average temperature in December
Pinole, CA
- Average high temperature in December: 55.4°F
The warmest month (with the highest average high temperature) is September (77.5°F).
The month with the lowest average high temperature is December (55.4°F).
- Average low temperature in December: 43.9°F
The month with the highest average low temperature is August (56.8°F).
The coldest months (with the lowest average low temperature) are January and December (43.9°F).
Average pressure in December
Pinole, 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
Pinole, CA
- Average wind speed in December: 5.5mph
The windiest month (with the highest average wind speed) is May (7.5mph).
The calmest month (with the lowest average wind speed) is November (4.8mph).
Average humidity in December
Pinole, CA
- Average humidity in December: 71%
The month with the highest relative humidity is March (74%).
The months with the lowest relative humidity are September and October (63%).
Average rainfall in December
Pinole, CA
- Average rainfall in December: 2.13"
The wettest month (with the highest rainfall) is February (2.76").
The driest months (with the least rainfall) are July and August (0.04").
Average rainfall days in December
Pinole, CA
- Average rainfall days in December: 10.4 days
The month with the highest number of rainy days is March (12.6 days).
The month with the least rainy days is August (1.1 days).
Average sea temperature in December
Pinole, CA
- Average sea temperature in December: 54.2°F
The best month for swimming (with the highest average sea temperature) is September (57°F).
The coldest month (with the lowest average sea temperature) is April (52.6°F).
Average daylight in December /
Average sunshine in December
Pinole, 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 4min
The month with the most sunshine is July (Average sunshine: 11h and 54min).
The month with the least sunshine is December (Average sunshine: 5h and 42min).
Average sunshine days in December
Pinole, CA
- Average sunshine days in December: 19.5 days
The month with the most sunshine days is August (27.3 days).
The month with the least sunshine days is March (16.4 days).
Average UV index in December
Pinole, CA
- Average UV index in December: 3
The months with the highest UV index are April, May, 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
Pinole, CA
- Average cloud cover in December: 36
The month with the most cloud cover is March (Cloud cover 37).
The month with the least cloud cover is July (Cloud cover 12).
Average visibility in December
Pinole, 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).
Pinole, California, USA
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