December weather forecast and climate
Arcadia, CA

Weather in December

The first month of the winter, December, is still a comfortable month in Arcadia, California, with average temperature varying between 46.2°F (7.9°C) and 62.1°F (16.7°C).

Temperature

The coldest month is December, with an average high-temperature of 62.1°F (16.7°C) and an average low-temperature of 46.2°F (7.9°C).

Humidity

In December, the average relative humidity in Arcadia is 52%.

Rainfall

The month with the most rainfall in Arcadia is December when the rain falls for 5.8 days and typically aggregates up to 1.54" (39mm) of precipitation.

Daylight

The month with the shortest days in Arcadia is December, with an average of 9.9h of daylight.

Sunshine

January, February and December, with an average of 6.9h of sunshine, are months with the least sunshine.

UV index

The month with the lowest UV index in Arcadia is December, with an average maximum UV index of 3. A UV Index of 3 to 5 symbolizes a moderate health risk from unprotected exposure to the Sun's UV rays for the average person.
Note: The daily maximum UV index of 3 in December interpret into the following advice:
Take precautions - Protection against sunburn is recommended. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.
[Resources]

FAQ

What is the coldest month in Arcadia?

With an average high-temperature of 62.1°F (16.7°C) and an average low-temperature of 46.2°F (7.9°C), December is the coldest month in Arcadia, California.

What is the temperature in December in Arcadia?

In December, the average high-temperature is 62.1°F (16.7°C), and the average low-temperature is 46.2°F (7.9°C).

What is the average humidity in December in Arcadia?

In Arcadia, California, the average relative humidity in December is 52%.

How much does it rain in Arcadia in December?

In Arcadia, California, in December, it is raining for 5.8 days, with typically 1.54" (39mm) of accumulated precipitation.

What is the rainiest month in Arcadia?

December is the month with the most rainfall in Arcadia. Rain falls for 5.8 days and accumulates 1.54" (39mm) of precipitation.

What is the month with the shortest days in Arcadia?

The month with the shortest days is December, with an average of 9.9h of daylight.

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

The average length of the day in December in Arcadia, California, is 9.9h.

What is the month with the least sunshine in Arcadia?

Months with the least sunshine are January, February and December, with an average of 6.9h of sunshine.

How many hours of sunshine does Arcadia have in December?

The average sunshine in December in Arcadia, California, is 6.9h.

What is the month with the lowest UV index in Arcadia?

The month with the lowest UV index is December, with an average maximum UV index of 3.

What is the UV index intensity in December in Arcadia?

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

Average temperature in December
Arcadia, CA

Average temperature in December - Arcadia, CA
  • Average high temperature in December: 62.1°F

The warmest month (with the highest average high temperature) is August (88.2°F).
The month with the lowest average high temperature is December (62.1°F).

  • Average low temperature in December: 46.2°F

The month with the highest average low temperature is August (64.8°F).
The coldest month (with the lowest average low temperature) is December (46.2°F).

[Resources]

Average pressure in December
Arcadia, CA

Average pressure in December - Arcadia, CA
  • Average pressure in December: 30.08"

The month with the highest atmospheric pressure is January (30.11").
The month with the lowest atmospheric pressure is June (29.88").

[Resources]

Average wind speed in December
Arcadia, CA

Average wind speed in December - Arcadia, CA
  • Average wind speed in December: 5.2mph

The windiest month (with the highest average wind speed) is April (5.8mph).
The calmest month (with the lowest average wind speed) is September (4.4mph).

[Resources]

Average humidity in December
Arcadia, CA

Average humidity in December - Arcadia, CA
  • Average humidity in December: 52%

Months with the highest relative humidity are March, May and June (56%).
The month with the lowest relative humidity is November (46%).

[Resources]

Average rainfall in December
Arcadia, CA

Average rainfall in December - Arcadia, CA
  • Average rainfall in December: 1.54"

The wettest month (with the highest rainfall) is December (1.54").
The driest month (with the least rainfall) is June (0.04").

[Resources]

Average rainfall days in December
Arcadia, CA

Average rainfall days in December - Arcadia, CA
  • Average rainfall days in December: 5.8 days

The month with the highest number of rainy days is March (6.5 days).
The month with the least rainy days is June (1.3 days).

[Resources]

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

Average daylight in December / Average sunshine in December - Arcadia, CA
  • Average daylight in December: 9.9h

The month with the longest days is June (Average daylight: 14.4h).
The month with the shortest days is December (Average daylight: 9.9h).

  • Average sunshine in December: 6.9h

The month with the most sunshine is July (Average sunshine: 12.1h).
Months with the least sunshine are January, February and December (Average sunshine: 6.9).

[Resources]

Average sunshine days in December
Arcadia, CA

Average sunshine days in December - Arcadia, CA
  • Average sunshine days in December: 23.8 days

The month with the most sunshine days is June (27.7 days).
The month with the least sunshine days is February (22 days).

[Resources]

Average UV index in December
Arcadia, CA

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

Months with the highest UV index are June, July, August and September (UV index 6).
The month with the lowest UV index is December (UV index 3).

[Resources]

Average cloud cover in December
Arcadia, CA

Average cloud cover in December - Arcadia, CA
  • Average cloud cover in December: 22

Months with the most cloud cover are March and December (Cloud cover 22).
The month with the least cloud cover is August (Cloud cover 5).

[Resources]

Average visibility in December
Arcadia, CA

Average visibility in December - Arcadia, 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]