December weather forecast and climate
Fort Irwin, CA

Weather in December

The first month of the winter, December, is also a fresh month in Fort Irwin, California, with average temperature varying between 55°F (12.8°C) and 40.1°F (4.5°C).

Temperature

The coldest month is December, with an average high-temperature of 55°F (12.8°C) and an average low-temperature of 40.1°F (4.5°C).

Humidity

With an average relative humidity of 47%, December is the most humid month in Fort Irwin.

Rainfall

December is the month with the most rainfall in Fort Irwin. Rain falls for 4.6 days and accumulates 0.51" (13mm) of precipitation.

Snowfall

In Fort Irwin snow does not fall in February through December.

Daylight

With an average of 9.8h of daylight, December has the shortest days of the year.

Sunshine

In December, the average sunshine in Fort Irwin, California, is 7.2h.

UV index

Months with the lowest UV index 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 the exposure to the Sun's UV radiation 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. 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. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.
[Resources]

FAQ

What is the coldest month in Fort Irwin?

December is the coldest month in Fort Irwin, with an average high-temperature of 55°F (12.8°C) and an average low-temperature of 40.1°F (4.5°C).

What is the temperature in December in Fort Irwin?

The average high-temperature, in December, in Fort Irwin, California, is 55°F (12.8°C), while the average low-temperature is 40.1°F (4.5°C).

What is the most humid month in Fort Irwin?

The most humid month in Fort Irwin is December, with an average relative humidity of 47%.

What is the average humidity in December in Fort Irwin?

In December, the average relative humidity is 47%.

How much does it rain in Fort Irwin in December?

In Fort Irwin, during December, the rain falls for 4.6 days and regularly aggregates up to 0.51" (13mm) of precipitation.

What is the wettest month in Fort Irwin?

The month with the most rainfall is December when the rain falls for 4.6 days and typically aggregates up to 0.51" (13mm) of precipitation.

Does it snow in Fort Irwin in December?

In Fort Irwin, California, in December, it doesn't snow. In January, it regularly snows.

When it does not snow in Fort Irwin?

February through December are months without snowfall.

What is the month with the shortest days in Fort Irwin?

With an average of 9.8h of daylight, December has the shortest days of the year in Fort Irwin, California.

What is the average length of the day in December in Fort Irwin?

In December, the average length of the day in Fort Irwin, California, is 9.8h.

How long on average sun shines in December in Fort Irwin?

In December, the average sunshine is 7.2h.

When is the lowest UV index in Fort Irwin?

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

How high is the UV index in December in Fort Irwin?

The average daily maximum UV index in December in Fort Irwin is 3. A UV Index estimate of 3 to 5 represents a medium hazard to health from the exposure to the Sun's UV rays.

Average temperature in December
Fort Irwin, CA

Average temperature in December - Fort Irwin, CA
  • Average high temperature in December: 55°F

The warmest month (with the highest average high temperature) is July (98.2°F).
The month with the lowest average high temperature is December (55°F).

  • Average low temperature in December: 40.1°F

The month with the highest average low temperature is August (74.7°F).
The coldest month (with the lowest average low temperature) is December (40.1°F).

[Resources]

Average pressure in December
Fort Irwin, CA

Average pressure in December - Fort Irwin, 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 (29.79").

[Resources]

Average wind speed in December
Fort Irwin, CA

Average wind speed in December - Fort Irwin, CA
  • Average wind speed in December: 6.6mph

The windiest month (with the highest average wind speed) is May (11.7mph).
The calmest month (with the lowest average wind speed) is January (6mph).

[Resources]

Average humidity in December
Fort Irwin, CA

Average humidity in December - Fort Irwin, CA
  • Average humidity in December: 47%

The month with the highest relative humidity is December (47%).
The month with the lowest relative humidity is August (21%).

[Resources]

Average rainfall in December
Fort Irwin, CA

Average rainfall in December - Fort Irwin, CA
  • Average rainfall in December: 0.51"

The wettest month (with the highest rainfall) is December (0.51").
The driest month (with the least rainfall) is June (0.04").

[Resources]

Average rainfall days in December
Fort Irwin, CA

Average rainfall days in December - Fort Irwin, CA
  • Average rainfall days in December: 4.6 days

The month with the highest number of rainy days is December (4.6 days).
The month with the least rainy days is June (0.6 days).

[Resources]

Average snowfall in December
Fort Irwin, CA

Average snowfall in December - Fort Irwin, CA
  • Average snowfall in December: 0"

The month with the highest snowfall is January (0.04").
Months with the least snowfall are February, March, April, May, June, July, August, September, October, November and December (0").

[Resources]

Average snowfall days in December
Fort Irwin, CA

Average snowfall days in December - Fort Irwin, CA
  • Average snowfall days in December: 0.3 days

Months with the highest number of snowfall days are January and December (0.3 days).
Months with the least snowfall days are February, March, April, May, June, July, August, September, October and November (0 days).

[Resources]

Average daylight in December /
Average sunshine in December
Fort Irwin, CA

Average daylight in December / Average sunshine in December - Fort Irwin, CA
  • Average daylight in December: 9.8h

The month with the longest days is June (Average daylight: 14.5h).
The month with the shortest days is December (Average daylight: 9.8h).

  • Average sunshine in December: 7.2h

Months with the most sunshine are June, July and August (Average sunshine: 12.1h).
The month with the least sunshine is January (Average sunshine: 7.1h).

[Resources]

Average sunshine days in December
Fort Irwin, CA

Average sunshine days in December - Fort Irwin, CA
  • Average sunshine days in December: 25.4 days

The month with the most sunshine days is June (29 days).
The month with the least sunshine days is February (23.5 days).

[Resources]

Average UV index in December
Fort Irwin, CA

Average UV index in December - Fort Irwin, CA
  • Average UV index in December: 3

Months with the highest UV index are June and July (UV index 8).
Months with the lowest UV index are November and December (UV index 3).

[Resources]

Average cloud cover in December
Fort Irwin, CA

Average cloud cover in December - Fort Irwin, CA
  • Average cloud cover in December: 18

The month with the most cloud cover is December (Cloud cover 18).
The month with the least cloud cover is June (Cloud cover 4).

[Resources]

Average visibility in December
Fort Irwin, CA

Average visibility in December - Fort Irwin, 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]