December weather forecast
Cajon Junction, CA

Share

Weather in December

The first month of the winter, December, is also a fresh month in Cajon Junction, California, with an average temperature varying between 39.4°F (4.1°C) and 54.5°F (12.5°C).

Temperature

December, with its average high-temperature of 54.5°F (12.5°C) and an average low-temperature of 39.4°F (4.1°C), holds the record as the coldest month.

Humidity

With an average relative humidity of 53%, December is the most humid month.

Rainfall

December is the month with the most rainfall in Cajon Junction, California. Rain falls for 4 days and accumulates 0.47" (12mm) of precipitation.

Snowfall

January through April, November and December are months with snowfall. The month with the most snowfall is December, when snow falls for 1.5 days and typically aggregates up to 1.5" (38mm) of snow.

Daylight

The month with the shortest days is December, with an average of 9h and 54min of daylight.
On the first day of the month, sunrise is at 6:38 am and sunset at 4:39 pm. On the last day of December, in Cajon Junction, sunrise is at 6:55 am and sunset at 4:50 pm PST.

Sunshine

With an average of 6.9h of sunshine, December has the least sunshine of the year in Cajon Junction.

UV index

The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 3. A UV Index of 3 to 5 symbolizes a medium vulnerability from unprotected exposure to Sun's UV rays for the ordinary person.
Note: The maximum UV index of 3 during December translates into these guidelines:
Preventative actions are necessary - Recommendations to ward off sunburn are given. Midday Sun has the strongest UV rays, making it crucial to limit exposure and find shade. Employ a hat with a wide brim for robust protection, cutting UV exposure by half. Be alert! Nearly double the UV rays from the Sun can be reflected by snow.
[Resources]

Frequently asked questions

What is the coldest month in Cajon Junction?

December is the coldest month in Cajon Junction, with the temperature often reaching an average high of 54.5°F (12.5°C) and an average low of 39.4°F (4.1°C).

What is the usual temperature for Cajon Junction in December?

December temperatures vary between a high-temperature of 54.5°F (12.5°C) and a low-temperature of 39.4°F (4.1°C). The average heat index (a.k.a. 'felt air temperature', 'apparent temperature'), which takes the relative humidity and factors it into the air temperature reading, in June is estimated at 84.2°F (29°C).

What is the most humid month in Cajon Junction?

With an average relative humidity of 53%, December is the most humid month in Cajon Junction.

What is the average humidity in December in Cajon Junction?

The average relative humidity in December in Cajon Junction, California, is 53%.

What is the rainiest month in Cajon Junction?

December is the month with the most rainfall in Cajon Junction. Rain falls for 4 days and accumulates 0.47" (12mm) of precipitation.

How many days does it rain in December in Cajon Junction?

In Cajon Junction, in December, it is raining for 4 days, with typically 0.47" (12mm) of accumulated precipitation.

What is the snowiest month in Cajon Junction?

The month with the most snowfall is December, when snow falls for 1.5 days and typically aggregates up to 1.5" (38mm) of snow.

How much does it snow in Cajon Junction in December?

In Cajon Junction, in December, during 1.5 snowfall days, 1.5" (38mm) of snow is typically accumulated.

What is the month with the shortest days in Cajon Junction?

December has the shortest days of the year, with an average of 9h and 54min of daylight.

What is the average length of the day in December in Cajon Junction?

The average day length in December in Cajon Junction, California, is 9h and 55min.

When is the sunrise / sunset in December in Cajon Junction?

In December, on the first day of the month, sunrise is at 6:38 am and sunset at 4:39 pm. On the last day of the month, sunrise is at 6:55 am and sunset at 4:50 pm PST.

What is the month with the least sunshine in Cajon Junction?

December has the least sunshine of the year in Cajon Junction, with an average of 6.9h of sunshine.

How long on average sun shines in December in Cajon Junction?

In Cajon Junction, California, the average sunshine duration in December is 6.9h.

What are the months with the lowest UV index in Cajon Junction?

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

What is the UV index intensity in December in Cajon Junction?

In Cajon Junction, California, the average daily maximum UV index in December is 3. A UV Index reading of 3 to 5 represents a medium health risk from exposure to the Sun's UV radiation.
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in December
Cajon Junction, CA

Average temperature in December - Cajon Junction, CA
  • Average high temperature in December: 54.5°F

The warmest month (with the highest average high temperature) is August (90.3°F).
The month with the lowest average high temperature is December (54.5°F).

  • Average low temperature in December: 39.4°F

The month with the highest average low temperature is August (66.7°F).
The coldest month (with the lowest average low temperature) is December (39.4°F).

[Resources]

Average pressure in December
Cajon Junction, CA

Average pressure in December - Cajon Junction, CA
  • Average pressure in December: 30.08"Hg

The month with the highest atmospheric pressure is January (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.85"Hg).

[Resources]

Average wind speed in December
Cajon Junction, CA

Average wind speed in December - Cajon Junction, CA
  • Average wind speed in December: 6.3mph

The windiest months (with the highest average wind speed) are April and May (8.1mph).
The calmest month (with the lowest average wind speed) is September (5.8mph).

[Resources]

Average humidity in December
Cajon Junction, CA

Average humidity in December - Cajon Junction, CA
  • Average humidity in December: 53%

The month with the highest relative humidity is December (53%).
The month with the lowest relative humidity is August (33%).

[Resources]

Average rainfall in December
Cajon Junction, CA

Average rainfall in December - Cajon Junction, CA
  • Average rainfall in December: 0.47"

The wettest month (with the highest rainfall) is December (0.47").
The driest month (with the least rainfall) is June (0").

[Resources]

Average rainfall days in December
Cajon Junction, CA

Average rainfall days in December - Cajon Junction, CA
  • Average rainfall days in December: 4 days

The month with the highest number of rainy days is March (4.9 days).
The month with the least rainy days is June (0.7 days).

[Resources]

Average snowfall in December
Cajon Junction, CA

Average snowfall in December - Cajon Junction, CA
  • Average snowfall in December: 1.5"

The month with the highest snowfall is December (1.5").
The months with the least snowfall are May, June, July, August, September and October (0").

[Resources]

Average snowfall days in December
Cajon Junction, CA

Average snowfall days in December - Cajon Junction, CA
  • Average snowfall days in December: 1.5 days

The month with the highest number of snowfall days is February (2.4 days).
The months with the least snowfall days are June, July, August, September and October (0 days).

[Resources]

Average daylight in December /
Average sunshine in December
Cajon Junction, CA

Average daylight in December / Average sunshine in December - Cajon Junction, CA
  • Average daylight in December: 9h and 5min

The month with the longest days is June (Average daylight: 14h and 24min).
The month with the shortest days is December (Average daylight: 9h and 54min).

  • Average sunshine in December: 6h and 5min

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 54min).

[Resources]

Average sunshine days in December
Cajon Junction, CA

Average sunshine days in December - Cajon Junction, CA
  • Average sunshine days in December: 25.6 days

The month with the most sunshine days is June (29 days).
The month with the least sunshine days is February (23.6 days).

[Resources]

Average UV index in December
Cajon Junction, CA

Average UV index in December - Cajon Junction, CA
  • Average UV index in December: 3

The months with the highest UV index are July and August (UV index 7).
The months with the lowest UV index are January, February, November and December (UV index 3).

[Resources]

Average cloud cover in December
Cajon Junction, CA

Average cloud cover in December - Cajon Junction, CA
  • Average cloud cover in December: 22

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

[Resources]

Average visibility in December
Cajon Junction, CA

Average visibility in December - Cajon Junction, 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).

[Resources]

Cajon Junction, California, USA

Weather forecast for your location

1. Click Locate me button
2. Allow the app to use your location