December weather forecast
Omus, CA

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Weather in December

December, the first month of the winter in Omus, is still a cool month, with temperature in the range of an average high of 55°F (12.8°C) and an average low of 40.1°F (4.5°C).

Temperature

Omus's December weather reaches an average high of 55°F (12.8°C) and an average low of 40.1°F (4.5°C), making it the coldest month.

Humidity

In December, the average relative humidity is 74%.

Rainfall

In Omus, California, in December, it is raining for 11.5 days, with typically 3.43" (87mm) of accumulated precipitation. Throughout the year, there are 81.2 rainfall days, and 19.84" (504mm) of precipitation is accumulated.

Snowfall

In Omus, snow does not fall in January, March through December.

Daylight

December has the shortest days of the year, with an average of 9h and 30min of daylight.
On the first day of December, sunrise is at 7:11 am and sunset at 4:50 pm. On the last day of the month, sunrise is at 7:29 am and sunset at 5:00 pm PST.

Sunshine

With an average of 5.6h of sunshine, December has the least sunshine of the year.

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 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 transforms into the following instructions:
Take precautions. Light skin individuals may get burned in less than 30 minutes. Direct Sun exposure should be minimized especially during midday when radiation is most intense. Sunglasses that ward off UVA and UVB rays play a pivotal role in reducing solar eye damage.
Updated: Jun 30, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What part of the year is the coldest?

December is the coldest month of the year, registering average temperatures as high as 55°F (12.8°C) and as low as 40.1°F (4.5°C).

What is the usual temperature for Omus in December?

The high-temperature, in December, in Omus, records 55°F (12.8°C), while the low-temperature is 40.1°F (4.5°C). In September, the average heat index (a.k.a. 'apparent temperature', 'feels like'), which takes the relative humidity and factors it into the air temperature reading, is calculated to be 84.2°F (29°C).

What is the average humidity in December?

In Omus, the average relative humidity in December is 74%.

How many days does it rain in December?

In Omus, in December, it is raining for 11.5 days, with typically 3.43" (87mm) of accumulated precipitation.

When it does not snow?

January, March through December are months without snowfall.

What is the month with the shortest days?

With an average of 9h and 30min of daylight, December has the shortest days of the year.

What is the average length of the day in December?

In December, the average day length is 9h and 31min.

When are sunrise and sunset in December?

In December, on the first day of the month, sunrise is at 7:11 am and sunset at 4:50 pm. On the last day of the month, sunrise is at 7:29 am and sunset at 5:00 pm PST.

What is the month with the least sunshine?

The month with the least sunshine is December, with an average of 5.6h of sunshine.

How many hours of sunshine does Omus have in December?

The average sunshine duration in December is 5.6h.

What are the months with the lowest UV index?

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

What is the UV index reading in December in Omus?

In Omus, the average daily maximum UV index in December is 3. A UV Index value of 3 to 5 symbolizes a moderate vulnerability from exposure to the Sun's UV radiation.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in December
Omus, CA

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

The warmest month (with the highest average high temperature) is July (84.7°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 (55°F).
The coldest month (with the lowest average low temperature) is December (40.1°F).

Average pressure in December
Omus, CA

Average pressure in December - Omus, CA
  • Average pressure in December: 30.1"Hg

The month with the highest atmospheric pressure is January (30.13"Hg).
The months with the lowest atmospheric pressure are June, August and September (29.92"Hg).

Average wind speed in December
Omus, CA

Average wind speed in December - Omus, CA
  • Average wind speed in December: 4.7mph

The windiest months (with the highest average wind speed) are April and May (6.2mph).
The calmest month (with the lowest average wind speed) is November (4.5mph).

Average humidity in December
Omus, CA

Average humidity in December - Omus, CA
  • Average humidity in December: 74%

The month with the highest relative humidity is March (76%).
The month with the lowest relative humidity is September (57%).

Average rainfall in December
Omus, CA

Average rainfall in December - Omus, CA
  • Average rainfall in December: 3.43"

The wettest month (with the highest rainfall) is February (4.33").
The driest months (with the least rainfall) are July and August (0.04").

Average rainfall days in December
Omus, CA

Average rainfall days in December - Omus, CA
  • Average rainfall days in December: 11.5 days

The month with the highest number of rainy days is March (14.2 days).
The month with the least rainy days is August (0.8 days).

Average snowfall in December
Omus, CA

Average snowfall in December - Omus, CA
  • Average snowfall in December: 0"

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

Average snowfall days in December
Omus, CA

Average snowfall days in December - Omus, CA
  • Average snowfall days in December: 0 days

The month with the highest number of snowfall days is February (0.1 days).
The months with the least snowfall days are January, March, April, May, June, July, August, September, October, November and December (0 days).

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

Average daylight in December / Average sunshine in December - Omus, CA
  • Average daylight in December: 9h and 3min

The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 30min).

  • Average sunshine in December: 5h and 4min

The month with the most sunshine is July (Average sunshine: 12h and 0min).
The month with the least sunshine is December (Average sunshine: 5h and 36min).

Average sunshine days in December
Omus, CA

Average sunshine days in December - Omus, CA
  • Average sunshine days in December: 18.6 days

The month with the most sunshine days is July (29.8 days).
The month with the least sunshine days is March (14.8 days).

Average UV index in December
Omus, CA

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

The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 3).

Average cloud cover in December
Omus, CA

Average cloud cover in December - Omus, CA
  • Average cloud cover in December: 38

The month with the most cloud cover is March (Cloud cover 41).
The months with the least cloud cover are July and August (Cloud cover 6).

Average visibility in December
Omus, CA

Average visibility in December - Omus, 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).

Omus, California, USA

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