December weather forecastPorterville, CA
December
Weather in December
The first month of the winter, December, is also a moderate month in Porterville, California, with temperature in the range of an average high of 57.6°F (14.2°C) and an average low of 40.3°F (4.6°C).Temperature
The month of December, characterized by an average high of 57.6°F (14.2°C) and a low of 40.3°F (4.6°C), is recognized as the coldest.Humidity
In December, the average relative humidity 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
The month with the shortest days is December, with an average of 9h and 48min of daylight.On the first day of the month, sunrise is at 6:48 am and sunset at 4:41 pm. On the last day of December, sunrise is at 7:06 am and sunset at 4:52 pm PST.
Sunshine
December has the least sunshine of the year, 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. A UV Index estimate of 3 to 5 represents a medium health hazard from exposure to the Sun's UV rays for the average person.Note: An average UV index of 3 in December transforms into this advice:
Exercise prevention - Precautions against solar damage are endorsed. Solar radiation is at its peak intensity during midday, so it's advisable to stay indoors or in the shade. To mitigate harm from sun exposure, pick sunglasses offering UVA and UVB defense.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
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).
Average pressure in December
Porterville, CA
- Average pressure in December: 30.11"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.87"Hg).
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).
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%).
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").
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).
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).
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
Porterville, CA
- Average daylight in December: 9h and 48min
The month with the longest days is June (Average daylight: 14h and 36min).
The month with the shortest days is December (Average daylight: 9h and 48min).
- Average sunshine in December: 6h and 48min
The months with the most sunshine are June and July (Average sunshine: 12h and 12min).
The month with the least sunshine is December (Average sunshine: 6h and 48min).
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).
Average UV index in December
Porterville, CA
- Average UV index in December: 3
The months with the highest UV index are June, July and August (UV index 7).
The months with the lowest UV index are January, November and December (UV index 3).
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).
The months with the least cloud cover are July and August (Cloud cover 4).
Average visibility in December
Porterville, 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).
