December weather forecast and climate
Lafayette, CA

Weather in December

December, the first month of the winter, in Lafayette, is also a fresh month, with temperature in the range of an average low of 43.7°F (6.5°C) and an average high of 55.2°F (12.9°C).

Temperature

The coldest month is December, with an average high-temperature of 55.2°F (12.9°C) and an average low-temperature of 43.7°F (6.5°C).

Humidity

In December, the average relative humidity in Lafayette is 71%.

Rainfall

In December, the rain falls for 10.7 days. Throughout December, 2.05" (52mm) of precipitation is accumulated. Throughout the year, in Lafayette, there are 74.4 rainfall days, and 12.6" (320mm) of precipitation is accumulated.

Daylight

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

Sunshine

The month with the least sunshine in Lafayette is December, with an average of 5.8h 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 of 3 to 5 symbolizes a medium vulnerability from unsafe exposure to the UV radiation for the average person.
Note: The average daily UV index of 3 in December transform into the following instructions:
Take precautions. Light skin individuals may get burned in less than 30 minutes. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. 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.
[Resources]

FAQ

What is the coldest month in Lafayette?

The coldest month in Lafayette is December, with an average high-temperature of 55.2°F (12.9°C) and an average low-temperature of 43.7°F (6.5°C).

What is the temperature in December in Lafayette?

The average high-temperature, in December, in Lafayette, California, is 55.2°F (12.9°C), while the average low-temperature is 43.7°F (6.5°C).

What is the average humidity in December in Lafayette?

The average relative humidity in December in Lafayette is 71%.

How many days does it rain in December in Lafayette?

In December, the rain falls for 10.7 days. Throughout December, 2.05" (52mm) of precipitation is accumulated.

What is the month with the shortest days in Lafayette?

The month with the shortest days in Lafayette is December, with an average of 9.6h of daylight.

How many hours of daylight does Lafayette have in December?

The average length of the day in December is 9.6h.

What is the month with the least sunshine in Lafayette?

The month with the least sunshine in Lafayette is December, with an average of 5.8h of sunshine.

How many hours of sunshine does Lafayette have in December?

In December, the average sunshine in Lafayette is 5.8h.

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

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

What is the UV index intensity in December in Lafayette?

In December, the average daily maximum UV index is 3. A UV Index reading of 3 to 5 represents a medium health risk from unprotected exposure to the UV radiation.

Average temperature in December
Lafayette, CA

Average temperature in December - Lafayette, 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

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).

[Resources]

Average pressure in December
Lafayette, CA

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

The month with the highest atmospheric pressure is January (30.14").
Months with the lowest atmospheric pressure are June, August and September (29.92").

[Resources]

Average wind speed in December
Lafayette, CA

Average wind speed in December - Lafayette, 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).

[Resources]

Average humidity in December
Lafayette, CA

Average humidity in December - Lafayette, 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%).

[Resources]

Average rainfall in December
Lafayette, CA

Average rainfall in December - Lafayette, 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").

[Resources]

Average rainfall days in December
Lafayette, CA

Average rainfall days in December - Lafayette, 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).

[Resources]

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

Average daylight in December / Average sunshine in December - Lafayette, 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: 5.8h

The month with the most sunshine is July (Average sunshine: 12h).
The month with the least sunshine is December (Average sunshine: 5.8h).

[Resources]

Average sunshine days in December
Lafayette, CA

Average sunshine days in December - Lafayette, 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).

[Resources]

Average UV index in December
Lafayette, CA

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

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

[Resources]

Average cloud cover in December
Lafayette, CA

Average cloud cover in December - Lafayette, 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).

[Resources]

Average visibility in December
Lafayette, CA

Average visibility in December - Lafayette, 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).

[Resources]