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
In Orinda, December records the lowest average temperatures, peaking at 55.2°F (12.9°C) and reaching a low of 43.7°F (6.5°C).Humidity
The average relative humidity in December in Orinda is 71%.Rainfall
In Orinda, in December, during 10.7 rainfall days, 2.05" (52mm) of precipitation is typically accumulated. Throughout the year, there are 74.4 rainfall days, and 12.6" (320mm) of precipitation is accumulated.Daylight
With an average of 9h and 36min of daylight, December has the shortest days of the year.On the first day of the month, sunrise is at 7:06 am and sunset at 4:49 pm. On the last day of December, in Orinda, California, sunrise is at 7:24 am and sunset at 4:59 pm PST.
Sunshine
With an average of 5.8h of sunshine, December has the least sunshine of the year.UV index
January, February, November and December, with an average maximum UV index of 3, are months with the lowest UV index in Orinda. A UV Index reading of 3 to 5 represents a moderate threat to health from unprotected exposure to Sun's UV rays for the average person.Note: The UV index of 3 during December translates into the following guidance:
Ensure safety - Imperative it is to shield skin and eyes from damage. The solar radiation around mid-day is intense; avoid the Sun and stay safe. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What time of the year is the coldest in Orinda?
What are December temperatures in Orinda?
What is the average humidity in December in Orinda?
How many days does it rain in December in Orinda?
What is the month with the shortest days in Orinda?
How many hours of daylight does Orinda have in December?
When is the sunrise / sunset in December in Orinda?
What is the month with the least sunshine in Orinda?
How long on average sun shines in December in Orinda?
When is the lowest UV index in Orinda?
What is the UV index reading in December in Orinda?
Average temperature in December
Orinda, CA
- Average high temperature in December: 55.2°F
The warmest month (with the highest average high temperature) is July (80.1°F).
The month with the lowest average high temperature is December (55.2°F).
- Average low temperature in December: 43.7°F
The months with the highest average low temperature are August and September (56.8°F).
The coldest month (with the lowest average low temperature) is January (43.3°F).
Average pressure in December
Orinda, CA
- Average pressure in December: 30.11"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The months with the lowest atmospheric pressure are June, August and September (29.92"Hg).
Average wind speed in December
Orinda, CA
- Average wind speed in December: 5.2mph
The windiest month (with the highest average wind speed) is May (7.2mph).
The calmest month (with the lowest average wind speed) is November (4.6mph).
Average humidity in December
Orinda, CA
- Average humidity in December: 71%
The month with the highest relative humidity is March (74%).
The month with the lowest relative humidity is October (60%).
Average rainfall in December
Orinda, CA
- Average rainfall in December: 2.05"
The wettest month (with the highest rainfall) is February (2.6").
The driest months (with the least rainfall) are July and August (0.04").
Average rainfall days in December
Orinda, CA
- Average rainfall days in December: 10.7 days
The month with the highest number of rainy days is March (13.1 days).
The month with the least rainy days is August (0.8 days).
Average daylight in December /
Average sunshine in December
Orinda, 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
Orinda, CA
- Average sunshine days in December: 19.2 days
The month with the most sunshine days is August (27.8 days).
The month with the least sunshine days is March (16.3 days).
Average UV index in December
Orinda, CA
- Average UV index in December: 3
The month with the highest UV index is June (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 3).
Average cloud cover in December
Orinda, CA
- Average cloud cover in December: 34
The month with the most cloud cover is March (Cloud cover 36).
The month with the least cloud cover is July (Cloud cover 8).
Average visibility in December
Orinda, 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).
Orinda, California, USA
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