December weather forecast
Imperial, CA

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Weather in December

December, the first month of the winter in Imperial, is still a comfortable month, with an average temperature fluctuating between 50°F (10°C) and 66.4°F (19.1°C).

Temperature

With average temperatures fluctuating between a high of 66.4°F (19.1°C) and a low of 50°F (10°C), December stands out as the coldest month.

Humidity

December is the most humid month in Imperial, California, with an average relative humidity of 40%.

Rainfall

The wettest months in Imperial, California, are March, April, July through September and December, with an average 0.08" (2mm) of rainfall.

Daylight

With an average of 10h and 0min of daylight, December has the shortest days of the year in Imperial.
On the first day of December in Imperial, sunrise is at 6:27 am and sunset at 4:35 pm. On the last day of the month, sunrise is at 6:44 am and sunset at 4:46 pm PST.

Sunshine

December has the least sunshine of the year in Imperial, California, with an average of 7.1h of sunshine.

UV index

With an average maximum UV index of 4, December is the month with the lowest UV index. A UV Index estimate of 3 to 5 represents a moderate threat to health from unsafe exposure to UV radiation for average individuals.
Note: The maximum daily UV index of 4 during December translates into the following directions:
Exercise prevention - Warding off sunburn is urged. Direct Sun exposure should be minimized especially during midday when radiation is most intense. Opt for tightly woven and loose clothing to enhance protection from the Sun.
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Frequently asked questions

What time of the year is the coldest in Imperial?

December, recording an average high temperature of 66.4°F (19.1°C) and a low temperature of 50°F (10°C), is Imperial's coldest month.

What are the temperatures in Imperial in December?

The average high-temperature, in December, in Imperial, is 66.4°F (19.1°C), while the average low-temperature is 50°F (10°C).

What is the most humid month in Imperial?

With an average relative humidity of 40%, December is the most humid month.

What is the average humidity in December in Imperial?

The average relative humidity in December in Imperial is 40%.

What is the rainiest month in Imperial?

The months with the most rainfall are March, April, July through September and December, with an average 0.08" (2mm) of precipitation.

How much does it rain in Imperial in December?

In Imperial, California, during December, the rain falls for 1 days and regularly aggregates up to 0.08" (2mm) of precipitation.

What is the month with the shortest days in Imperial?

The month with the shortest days in Imperial is December, with an average of 10h and 0min of daylight.

How many hours of daylight does Imperial have in December?

The average day length in December is 10h and 2min.

What time are sunrise and sunset in December in Imperial?

On the first day of December in Imperial, sunrise is at 6:27 am and sunset at 4:35 pm. On the last day of the month, sunrise is at 6:44 am and sunset at 4:46 pm PST.

What is the month with the least sunshine in Imperial?

With an average of 7.1h of sunshine, December has the least sunshine of the year in Imperial.

How long on average sun shines in December in Imperial?

In December, the average sunshine duration in Imperial, California, is 7.1h.

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

The month with the lowest UV index in Imperial is December, with an average maximum UV index of 4.

What is the UV index reading in December in Imperial?

In December, the average daily maximum UV index in Imperial is 4. A UV Index estimate of 3 to 5 represents a moderate health threat from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in December
Imperial, CA

Average temperature in December - Imperial, CA
  • Average high temperature in December: 66.4°F

The warmest month (with the highest average high temperature) is July (106.7°F).
The month with the lowest average high temperature is December (66.4°F).

  • Average low temperature in December: 50°F

The month with the highest average low temperature is August (85.5°F).
The coldest month (with the lowest average low temperature) is January (49.8°F).

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Average pressure in December
Imperial, CA

Average pressure in December - Imperial, CA
  • Average pressure in December: 30.05"Hg

The month with the highest atmospheric pressure is January (30.08"Hg).
The month with the lowest atmospheric pressure is June (29.78"Hg).

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Average wind speed in December
Imperial, CA

Average wind speed in December - Imperial, CA
  • Average wind speed in December: 5.4mph

The windiest month (with the highest average wind speed) is April (7.6mph).
The calmest month (with the lowest average wind speed) is January (5.2mph).

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Average humidity in December
Imperial, CA

Average humidity in December - Imperial, CA
  • Average humidity in December: 40%

The month with the highest relative humidity is December (40%).
The month with the lowest relative humidity is June (21%).

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Average rainfall in December
Imperial, CA

Average rainfall in December - Imperial, CA
  • Average rainfall in December: 0.08"

The wettest months (with the highest rainfall) are March, April, July, August, September and December (0.08").
The driest months (with the least rainfall) are May and June (0").

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Average rainfall days in December
Imperial, CA

Average rainfall days in December - Imperial, CA
  • Average rainfall days in December: 1 days

The month with the highest number of rainy days is July (2.8 days).
The month with the least rainy days is May (0.3 days).

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

Average daylight in December / Average sunshine in December - Imperial, CA
  • Average daylight in December: 10h and 0min

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 0min).

  • Average sunshine in December: 7h and 1min

The month with the most sunshine is June (Average sunshine: 12h and 12min).
The month with the least sunshine is December (Average sunshine: 7h and 6min).

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Average sunshine days in December
Imperial, CA

Average sunshine days in December - Imperial, CA
  • Average sunshine days in December: 29.8 days

The month with the most sunshine days is May (30.4 days).
The month with the least sunshine days is August (25.8 days).

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Average UV index in December
Imperial, CA

Average UV index in December - Imperial, CA
  • Average UV index in December: 4

The months with the highest UV index are July and August (UV index 9).
The month with the lowest UV index is December (UV index 4).

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Average cloud cover in December
Imperial, CA

Average cloud cover in December - Imperial, CA
  • Average cloud cover in December: 17

The month with the most cloud cover is December (Cloud cover 17).
The month with the least cloud cover is June (Cloud cover 4).

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Average visibility in December
Imperial, CA

Average visibility in December - Imperial, 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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Imperial, California, USA

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