December weather forecast
Julian, CA

Weather in December

The first month of the winter, December, is also an enjoyable month in Julian, California, with temperature in the range of an average high of 61.3°F (16.3°C) and an average low of 44.6°F (7°C).

Temperature

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

Humidity

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

Rainfall

In December, the rain falls for 5.5 days. Throughout December, 0.71" (18mm) of precipitation is accumulated. Throughout the year, there are 62 rainfall days, and 6.38" (162mm) of precipitation is accumulated.

Snowfall

January through May, November and December are months with snowfall in Julian. During December, Julian regularly aggregates up to 2.52" (64mm) of snow. In Julian, during the entire year, snow aggregates up to 22.01" (559mm).

Daylight

The month with the shortest days is December, with an average of 10h and 1min of daylight.
On the first day of the month, sunrise is at 6:31 am and sunset at 4:39 pm. On the last day of December, sunrise is at 6:49 am and sunset at 4:49 pm PST.

Sunshine

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

UV index

The months with the lowest UV index in Julian, California, are November and December, with an average maximum UV index of 3. A UV Index estimate of 3 to 5 represents a medium vulnerability from unprotected exposure to Sun's UV rays for the ordinary person.
Note: The average daily UV index of 3 in December transform into the following instructions:
Take precautions - Protection against sun damage is advised. 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?

The coldest month in Julian 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).

What is the temperature in December in Julian?

In December, in Julian, the average high-temperature is 61.3°F (16.3°C), and the average low-temperature is 44.6°F (7°C). The average heat index (a.k.a. 'apparent temperature', 'feels like'), which factors the actual air temperature with the relative humidity, in September is calculated to be 86°F (30°C).

What is the average humidity in December in Julian?

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

How many days does it rain in December in Julian?

In December, in Julian, California, the rain falls for 5.5 days. Throughout December, 0.71" (18mm) of precipitation is accumulated.

How much does it snow in Julian in December?

In Julian, in December, 2.52" (64mm) of snow is typically accumulated.

What is the month with the shortest days in Julian?

December has the shortest days of the year, with an average of 10h and 1min of daylight.

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

The average day length in December in Julian is 10h and 1min.

What time are sunrise and sunset in December in Julian?

On the first day of December, sunrise is at 6:31 am and sunset at 4:39 pm. On the last day of the month, sunrise is at 6:49 am and sunset at 4:49 pm PST.

What is the month with the least sunshine in Julian?

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

How long on average sun shines in December in Julian?

In December, the average sunshine duration in Julian, California, is 6.7h.

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

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

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 estimate of 3 to 5 represents a moderate vulnerability from unsafe exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

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"Hg

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

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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").
The 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 and 1min

The month with the longest days is June (Average daylight: 14h and 18min).
The month with the shortest days is December (Average daylight: 10h and 1min).

  • Average sunshine in December: 6h and 42min

The months with the most sunshine are June and July (Average sunshine: 12h and 6min).
The month with the least sunshine is December (Average sunshine: 6h and 42min).

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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

The months with the highest UV index are June, July, August and September (UV index 6).
The 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

The 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

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

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