December weather forecast and climate
Concord, CA

Weather in December

The first month of the winter, December, is still a mild month in Concord, California, with temperature in the range of an average low of 42.4°F (5.8°C) and an average high of 55.6°F (13.1°C).

Temperature

With an average high-temperature of 55.6°F (13.1°C) and an average low-temperature of 42.4°F (5.8°C), December is the coldest month.

Humidity

In December, the average relative humidity in Concord is 70%.

Rainfall

In Concord, 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

December has the shortest days of the year, with an average of 9.6h of daylight.

Sunshine

December has the least sunshine of the year in Concord, with an average of 5.7h of sunshine.

UV index

Months with the lowest UV index in Concord are January, February, November and December, with an average maximum UV index of 3. A UV Index reading of 3 to 5 represents a moderate health risk from the exposure to the Sun's UV rays for average individuals.
Note: The average daily UV index of 3 transform into the following instructions:
Take precautions - Protection against sun damage is advised. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun.
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FAQ

What is the coldest month in Concord?

With an average high-temperature of 55.6°F (13.1°C) and an average low-temperature of 42.4°F (5.8°C), December is the coldest month in Concord, California.

What is the temperature in December in Concord?

In Concord, in December, the average high-temperature is 55.6°F (13.1°C), and the average low-temperature is 42.4°F (5.8°C).

What is the average humidity in December in Concord?

In December, the average relative humidity in Concord is 70%.

How many days does it rain in December in Concord?

In Concord, California, in December, it is raining for 7.5 days, with typically 0.59" (15mm) of accumulated precipitation.

What is the month with the shortest days in Concord?

With an average of 9.6h of daylight, December has the shortest days of the year in Concord, California.

What is the average length of the day in December in Concord?

In Concord, the average length of the day in December is 9.6h.

What is the month with the least sunshine in Concord?

With an average of 5.7h of sunshine, December has the least sunshine of the year in Concord, California.

How long on average sun shines in December in Concord?

The average sunshine in December in Concord is 5.7h.

What are the months with the lowest UV index in Concord?

January, February, November and December, with an average maximum UV index of 3, are months with the lowest UV index in Concord.

How high is the UV index in December in Concord?

In December, the average daily maximum UV index is 3. A UV Index of 3 to 5 symbolizes a medium health risk from the exposure to the Sun's UV radiation.

Average temperature in December
Concord, CA

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).

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Average pressure in December
Concord, CA

Average pressure in December - Concord, CA
  • Average pressure in December: 30.11"

The month with the highest atmospheric pressure is January (30.14").
The month with the lowest atmospheric pressure is June (29.91").

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Average wind speed in December
Concord, CA

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).

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Average humidity in December
Concord, CA

Average humidity in December - Concord, CA
  • Average humidity in December: 70%

Months with the highest relative humidity are January and March (73%).
The month with the lowest relative humidity is September (56%).

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Average rainfall in December
Concord, CA

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").

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Average rainfall days in December
Concord, CA

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).

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Average daylight in December /
Average sunshine in December
Concord, CA

Average daylight in December / Average sunshine in December - Concord, CA
  • Average daylight in December: 9.6h

The month with the longest days is June (Average daylight: 14.8h).
The month with the shortest days is December (Average daylight: 9.6h).

  • Average sunshine in December: 5.7h

The month with the most sunshine is July (Average sunshine: 12h).
The month with the least sunshine is December (Average sunshine: 5.7h).

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Average sunshine days in December
Concord, CA

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).

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Average UV index in December
Concord, CA

Average UV index in December - Concord, CA
  • Average UV index in December: 3

Months with the highest UV index are June and August (UV index 6).
Months with the lowest UV index are January, February, November and December (UV index 3).

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Average cloud cover in December
Concord, CA

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).

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Average visibility in December
Concord, CA

Average visibility in December - Concord, CA
  • Average visibility in December: 6mi

Months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

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