December weather forecast and climate
Julian, CA

Weather in December

December, the first month of the winter, in Julian, is still a comfortable month, with average temperature varying between 61.3°F (16.3°C) and 44.6°F (7°C).

Temperature

The coldest month is December, with an average high-temperature of 61.3°F (16.3°C) and an average low-temperature of 44.6°F (7°C).

Humidity

The average relative humidity in Julian is 57%.

Rainfall

In Julian, during 5.5 rainfall days, 0.71" (18mm) of precipitation is typically accumulated. In Julian, during the entire year, the rain falls for 62 days and collects up to 6.38" (162mm) of precipitation.

Snowfall

January through May, November and December are months with snowfall. In Julian, 2.5" (63.5mm) of snow is typically accumulated. Throughout the year, in Julian, California, 22" (558.7mm) of snow is accumulated.

Daylight

December has the shortest days of the year, with an average of 10h of daylight.

Sunshine

December has the least sunshine of the year, with an average of 6.7h of sunshine.

UV index

Months with the lowest UV index are November and December, with an average maximum UV index of 3. A UV Index of 3 to 5 symbolizes a medium vulnerability from the exposure to the Sun's UV radiation for the ordinary person.
Note: The average daily UV index of 3 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. 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. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.
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FAQ

What is the coldest month in Julian?

December is the coldest month in Julian, with an average high-temperature of 61.3°F (16.3°C) and an average low-temperature of 44.6°F (7°C).

What is the temperature in December in Julian?

The average high-temperature, in December, in Julian, California, is 61.3°F (16.3°C), while the average low-temperature is 44.6°F (7°C).

What is the average humidity in December in Julian?

The average relative humidity in December in Julian is 57%.

How many days does it rain in December in Julian?

In Julian, California, in December, during 5.5 rainfall days, 0.71" (18mm) of precipitation is typically accumulated.

How much does it snow in Julian in December?

Throughout December, 2.5" (63.5mm) of snow is accumulated.

What is the month with the shortest days in Julian?

December has the shortest days of the year in Julian, California, with an average of 10h of daylight.

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

In Julian, California, the average length of the day in December is 10h.

What is the month with the least sunshine in Julian?

The month with the least sunshine is December, with an average of 6.7h of sunshine.

How long on average sun shines in December in Julian?

The average sunshine in December in Julian is 6.7h.

When is the lowest UV index in Julian?

Months with the lowest UV index in Julian, California, are November and December, with an average maximum UV index of 3.

How high is the UV index in December in Julian?

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

Average temperature in December
Julian, CA

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

The warmest month (with the highest average high temperature) is August (87.3°F).
The month with the lowest average high temperature is December (61.3°F).

  • Average low temperature in December: 44.6°F

The month with the highest average low temperature is August (64.9°F).
The coldest month (with the lowest average low temperature) is February (44.2°F).

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Average pressure in December
Julian, CA

Average pressure in December - Julian, CA
  • Average pressure in December: 30.06"

The month with the highest atmospheric pressure is January (30.09").
The month with the lowest atmospheric pressure is June (29.85").

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Average wind speed in December
Julian, CA

Average wind speed in December - Julian, CA
  • Average wind speed in December: 5.1mph

The windiest month (with the highest average wind speed) is May (5.7mph).
The calmest month (with the lowest average wind speed) is September (4.1mph).

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Average humidity in December
Julian, CA

Average humidity in December - Julian, CA
  • Average humidity in December: 57%

The month with the highest relative humidity is May (62%).
The month with the lowest relative humidity is November (51%).

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Average rainfall in December
Julian, CA

Average rainfall in December - Julian, CA
  • Average rainfall in December: 0.71"

The wettest month (with the highest rainfall) is February (0.94").
The driest month (with the least rainfall) is June (0.08").

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Average rainfall days in December
Julian, CA

Average rainfall days in December - Julian, CA
  • Average rainfall days in December: 5.5 days

The month with the highest number of rainy days is March (7.6 days).
The month with the least rainy days is June (1.5 days).

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Average snowfall in December
Julian, CA

Average snowfall in December - Julian, CA
  • Average snowfall in December: 2.5"

The month with the highest snowfall is March (6.7").
Months with the least snowfall are June, July, August, September and October (0").

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

Average daylight in December / Average sunshine in December - Julian, CA
  • Average daylight in December: 10h

The month with the longest days is June (Average daylight: 14.3h).
The month with the shortest days is December (Average daylight: 10h).

  • Average sunshine in December: 6.7h

Months with the most sunshine are June and July (Average sunshine: 12.1h).
The month with the least sunshine is December (Average sunshine: 6.7h).

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Average sunshine days in December
Julian, CA

Average sunshine days in December - Julian, CA
  • Average sunshine days in December: 24 days

The month with the most sunshine days is June (27.5 days).
The month with the least sunshine days is July (19.4 days).

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Average UV index in December
Julian, CA

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

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

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Average cloud cover in December
Julian, CA

Average cloud cover in December - Julian, CA
  • Average cloud cover in December: 23

Months with the most cloud cover are March and December (Cloud cover 23).
The month with the least cloud cover is August (Cloud cover 6).

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Average visibility in December
Julian, CA

Average visibility in December - Julian, 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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