December weather forecastConcord, CA
December
Weather in December
December marks the height of winter in Concord. Weather takes a frosty turn with a further drop in average temperatures. Cold winds bring a sharp reminder of winter's grip and rainfall increases filling the rivers and streams. Although temperatures dip, December sees the second-highest peak in relative humidity at 70%. As a reflection of season's goodwill, December carpets Concord in a joyous white, signaling the year's end with festivities and jubilation.Temperature
December proves to be the coldest month in Concord, recording an average maximum temperature of 55.6°F (13.1°C) and a minimum temperature of 42.4°F (5.8°C).Humidity
The average relative humidity in December in Concord is 70%.Rainfall
In Concord, California, during December, the rain falls for 7.5 days and regularly aggregates up to 0.59" (15mm) of precipitation. In Concord, during the entire year, the rain falls for 49.3 days and collects up to 3.82" (97mm) of precipitation.Daylight
With an average of 9h and 36min of daylight, December has the shortest days of the year.On the first day of December in Concord, sunrise is at 7:05 am and sunset at 4:48 pm. On the last day of the month, sunrise is at 7:23 am and sunset at 4:59 pm PST.
Sunshine
The month with the least sunshine is December, with an average of 5.7h of sunshine.UV index
January, February, November and December, with an average maximum UV index of 3, are months with the lowest UV index. A UV Index reading of 3 to 5 represents a medium health hazard from exposure to the Sun's UV rays for average individuals.Note: The daily maximum UV index of 3 in December interprets into the following advice:
Undertake protective steps - Obligation to safeguard skin and eyes from harm is in place. It's crucial to reduce time in the direct Sun around mid-day due to the intense solar radiation. A hat with a broad brim is indispensable, filtering out up to half of UV rays.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Concord, CA
- Average high temperature in December: 55.6°F
The warmest month (with the highest average high temperature) is July (83.7°F).
The month with the lowest average high temperature is December (55.6°F).
- Average low temperature in December: 42.4°F
The month with the highest average low temperature is September (57.4°F).
The coldest month (with the lowest average low temperature) is January (42.3°F).
Average pressure in December
Concord, CA
- Average pressure in December: 30.11"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in December
Concord, CA
- Average wind speed in December: 5mph
The windiest month (with the highest average wind speed) is May (7.6mph).
The calmest month (with the lowest average wind speed) is November (4.5mph).
Average humidity in December
Concord, CA
- Average humidity in December: 70%
The months with the highest relative humidity are January and March (73%).
The month with the lowest relative humidity is September (56%).
Average rainfall in December
Concord, CA
- Average rainfall in December: 0.59"
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
Concord, CA
- Average rainfall days in December: 7.5 days
The month with the highest number of rainy days is March (9.8 days).
The month with the least rainy days is August (0.5 days).
Average daylight in December /
Average sunshine in December
Concord, CA
- Average daylight in December: 9h and 36min
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 42min
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 42min).
Average sunshine days in December
Concord, CA
- Average sunshine days in December: 22.2 days
The month with the most sunshine days is July (29.5 days).
The month with the least sunshine days is March (20 days).
Average UV index in December
Concord, CA
- Average UV index in December: 3
The months with the highest UV index are June and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 3).
Average cloud cover in December
Concord, 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 8).
Average visibility in December
Concord, 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).
