December weather forecast and climate
Porterville, CA

Weather in December

December, the first month of the winter, in Porterville, is still a mild month, with average temperature fluctuating between 40.3°F (4.6°C) and 57.6°F (14.2°C).

Temperature

The coldest month is December, with an average high-temperature of 57.6°F (14.2°C) and an average low-temperature of 40.3°F (4.6°C).

Humidity

The average relative humidity in December is 63%.

Rainfall

In Porterville, in December, it is raining for 6.8 days, with typically 1.61" (41mm) of accumulated precipitation. Throughout the year, there are 52.3 rainfall days, and 9.37" (238mm) of precipitation is accumulated.

Snowfall

January, March through December are months without snowfall.

Daylight

December has the shortest days of the year in Porterville, with an average of 9.7h of daylight.

Sunshine

The month with the least sunshine is December, with an average of 6.8h of sunshine.

UV index

January, November and December, with an average maximum UV index of 3, are months with the lowest UV index in Porterville, California. A UV Index reading of 3 to 5 represents a moderate health risk from the exposure to the Sun's UV rays for average individuals.
Note: In December, the average maximum UV index of 3 translate into the following recommendations:
Take precautions. Light skin individuals may get burned in less than 30 minutes. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun.
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FAQ

What is the coldest month in Porterville?

With an average high-temperature of 57.6°F (14.2°C) and an average low-temperature of 40.3°F (4.6°C), December is the coldest month.

What is the temperature in December in Porterville?

In Porterville, in December, the average high-temperature is 57.6°F (14.2°C), and the average low-temperature is 40.3°F (4.6°C).

What is the average humidity in December in Porterville?

In Porterville, California, the average relative humidity in December is 63%.

How much does it rain in Porterville in December?

In Porterville, California, in December, it is raining for 6.8 days, with typically 1.61" (41mm) of accumulated precipitation.

When it does not snow in Porterville?

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

What is the month with the shortest days in Porterville?

With an average of 9.7h of daylight, December has the shortest days of the year.

How many hours of daylight does Porterville have in December?

The average length of the day in December in Porterville is 9.7h.

What is the month with the least sunshine in Porterville?

With an average of 6.8h of sunshine, December has the least sunshine of the year in Porterville, California.

How many hours of sunshine does Porterville have in December?

The average sunshine in December in Porterville is 6.8h.

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

Months with the lowest UV index in Porterville, California, are January, November and December, with an average maximum UV index of 3.

What is the UV index reading in December in Porterville?

In Porterville, the average daily maximum UV index in December is 3. A UV Index estimate of 3 to 5 represents a moderate health threat from the exposure to the Sun's UV radiation.

Average temperature in December
Porterville, CA

Average temperature in December - Porterville, CA
  • Average high temperature in December: 57.6°F

The warmest month (with the highest average high temperature) is July (97.7°F).
The month with the lowest average high temperature is December (57.6°F).

  • Average low temperature in December: 40.3°F

The month with the highest average low temperature is July (65.1°F).
The coldest month (with the lowest average low temperature) is December (40.3°F).

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Average pressure in December
Porterville, CA

Average pressure in December - Porterville, CA
  • Average pressure in December: 30.11"

The month with the highest atmospheric pressure is January (30.14").
The month with the lowest atmospheric pressure is June (29.87").

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Average wind speed in December
Porterville, CA

Average wind speed in December - Porterville, CA
  • Average wind speed in December: 3.6mph

The windiest month (with the highest average wind speed) is June (5.2mph).
The calmest month (with the lowest average wind speed) is December (3.6mph).

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Average humidity in December
Porterville, CA

Average humidity in December - Porterville, CA
  • Average humidity in December: 63%

The month with the highest relative humidity is January (64%).
The month with the lowest relative humidity is August (30%).

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Average rainfall in December
Porterville, CA

Average rainfall in December - Porterville, CA
  • Average rainfall in December: 1.61"

The wettest month (with the highest rainfall) is March (1.93").
The driest months (with the least rainfall) are June and August (0.04").

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Average rainfall days in December
Porterville, CA

Average rainfall days in December - Porterville, CA
  • Average rainfall days in December: 6.8 days

The month with the highest number of rainy days is March (9.3 days).
The month with the least rainy days is August (0.5 days).

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Average snowfall days in December
Porterville, CA

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

The month with the highest number of snowfall days is February (0.2 days).
Months with the least snowfall days are January, March, April, May, June, July, August, September, October, November and December (0 days).

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

Average daylight in December / Average sunshine in December - Porterville, CA
  • Average daylight in December: 9.7h

The month with the longest days is June (Average daylight: 14.6h).
The month with the shortest days is December (Average daylight: 9.7h).

  • Average sunshine in December: 6.8h

Months with the most sunshine are June and July (Average sunshine: 12.2h).
The month with the least sunshine is December (Average sunshine: 6.8h).

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Average sunshine days in December
Porterville, CA

Average sunshine days in December - Porterville, CA
  • Average sunshine days in December: 23.1 days

The month with the most sunshine days is August (28.8 days).
The month with the least sunshine days is February (20.3 days).

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Average UV index in December
Porterville, CA

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

Months with the highest UV index are June, July and August (UV index 7).
Months with the lowest UV index are January, November and December (UV index 3).

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Average cloud cover in December
Porterville, CA

Average cloud cover in December - Porterville, CA
  • Average cloud cover in December: 22

The month with the most cloud cover is March (Cloud cover 24).
Months with the least cloud cover are July and August (Cloud cover 4).

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Average visibility in December
Porterville, CA

Average visibility in December - Porterville, 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).

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