December weather forecast and climate
Oak Park, CA

Weather in December

The first month of the winter, December, is also an enjoyable month in Oak Park, California, with average temperature varying between 49.5°F (9.7°C) and 61.3°F (16.3°C).

Temperature

December is the coldest month, with an average high-temperature of 61.3°F (16.3°C) and an average low-temperature of 49.5°F (9.7°C).

Humidity

The average relative humidity in December is 57%.

Rainfall

In Oak Park, California, it is raining for 5.9 days, with typically 1.73" (44mm) of accumulated precipitation. Throughout the year, there are 52.4 rainfall days, and 9.96" (253mm) of precipitation is accumulated.

Daylight

With an average of 9.9h of daylight, December has the shortest days of the year.

Sunshine

January, February and December, with an average of 6.8h of sunshine, are months with the least sunshine.

UV index

Months with the lowest UV index are January through March, November and December, with an average maximum UV index of 4. A UV Index value of 3 to 5 symbolizes a medium health hazard from unsafe exposure to the UV radiation for the ordinary person.
Note: In December, the average maximum UV index of 4 translate into the following recommendations:
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. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.
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FAQ

What is the coldest month in Oak Park?

December is the coldest month in Oak Park, with an average high-temperature of 61.3°F (16.3°C) and an average low-temperature of 49.5°F (9.7°C).

What is the temperature in December in Oak Park?

The average high-temperature, in December, is 61.3°F (16.3°C), while the average low-temperature is 49.5°F (9.7°C).

What is the average humidity in December in Oak Park?

In Oak Park, the average relative humidity in December is 57%.

How much does it rain in Oak Park in December?

In December, in Oak Park, California, the rain falls for 5.9 days. Throughout December, 1.73" (44mm) of precipitation is accumulated.

What is the month with the shortest days in Oak Park?

With an average of 9.9h of daylight, December has the shortest days of the year in Oak Park, California.

How many hours of daylight does Oak Park have in December?

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

What is the month with the least sunshine in Oak Park?

Months with the least sunshine in Oak Park, California, are January, February and December, with an average of 6.8h of sunshine.

How many hours of sunshine does Oak Park have in December?

In December, the average sunshine in Oak Park is 6.8h.

What is the month with the lowest UV index in Oak Park?

Months with the lowest UV index are January through March, November and December, with an average maximum UV index of 4.

How high is the UV index in December in Oak Park?

In Oak Park, California, the average daily maximum UV index in December is 4. A UV Index reading of 3 to 5 represents a medium hazard to health from unsafe exposure to the Sun's UV rays.

Average temperature in December
Oak Park, CA

Average temperature in December - Oak Park, CA
  • Average high temperature in December: 61.3°F

The warmest month (with the highest average high temperature) is August (79.9°F).
The month with the lowest average high temperature is December (61.3°F).

  • Average low temperature in December: 49.5°F

The month with the highest average low temperature is August (64°F).
The coldest month (with the lowest average low temperature) is February (49.3°F).

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Average pressure in December
Oak Park, CA

Average pressure in December - Oak Park, CA
  • Average pressure in December: 30.08"

The month with the highest atmospheric pressure is January (30.1").
Months with the lowest atmospheric pressure are June and September (29.9").

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Average wind speed in December
Oak Park, CA

Average wind speed in December - Oak Park, CA
  • Average wind speed in December: 6.4mph

The windiest months (with the highest average wind speed) are April and December (6.4mph).
The calmest months (with the lowest average wind speed) are August and September (4.7mph).

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Average humidity in December
Oak Park, CA

Average humidity in December - Oak Park, CA
  • Average humidity in December: 57%

The month with the highest relative humidity is June (69%).
The month with the lowest relative humidity is November (53%).

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Average rainfall in December
Oak Park, CA

Average rainfall in December - Oak Park, CA
  • Average rainfall in December: 1.73"

The wettest months (with the highest rainfall) are January and February (2.09").
The driest month (with the least rainfall) is June (0.08").

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Average rainfall days in December
Oak Park, CA

Average rainfall days in December - Oak Park, CA
  • Average rainfall days in December: 5.9 days

The month with the highest number of rainy days is March (7.5 days).
The month with the least rainy days is August (1.9 days).

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Average daylight in December /
Average sunshine in December
Oak Park, CA

Average daylight in December / Average sunshine in December - Oak Park, 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: 6.8h

Months with the most sunshine are June and July (Average sunshine: 12.1h).
Months with the least sunshine are January, February and December (Average sunshine: 6.8).

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Average sunshine days in December
Oak Park, CA

Average sunshine days in December - Oak Park, CA
  • Average sunshine days in December: 23.5 days

The month with the most sunshine days is October (26.4 days).
The month with the least sunshine days is February (20.8 days).

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Average UV index in December
Oak Park, CA

Average UV index in December - Oak Park, CA
  • Average UV index in December: 4

Months with the highest UV index are June, July, August and September (UV index 6).
Months with the lowest UV index are January, February, March, November and December (UV index 4).

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Average cloud cover in December
Oak Park, CA

Average cloud cover in December - Oak Park, CA
  • Average cloud cover in December: 21

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

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Average visibility in December
Oak Park, CA

Average visibility in December - Oak Park, 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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