Contents
- Weather in December
- Frequently asked questions
- Average temperature in December
- Average pressure in December
- Average wind speed in December
- Average humidity in December
- Average rainfall in December
- Average rainfall days in December
- Average snowfall days in December
- Average daylight in December
- Average sunshine in December
- Average sunshine days in December
- Average UV index in December
- Average cloud cover in December
- Average visibility in December
Weather in December
Temperature
December proves to be the coldest month, recording an average maximum temperature of 54.5°F (12.5°C) and a minimum temperature of 40.6°F (4.8°C).Humidity
The average relative humidity in December is 67%.Rainfall
In Palermo, during December, the rain falls for 11.1 days and regularly aggregates up to 4.33" (110mm) of precipitation. Throughout the year, there are 80.4 rainfall days, and 24.21" (615mm) of precipitation is accumulated.Snowfall
December is the only month when snow falls in Palermo. The month with the most snowfall days is December, when snow falls for 0.1 days.Daylight
The month with the shortest days is December, with an average of 9h and 24min of daylight.On the first day of the month, sunrise is at 7:07 am and sunset at 4:43 pm. On the last day of December, in Palermo, sunrise is at 7:26 am and sunset at 4:52 pm PST.
Sunshine
With an average of 5.8h of sunshine, December has the least sunshine of the year in Palermo.UV index
January, February, November and December, with an average maximum UV index of 3, are months with the lowest UV index in Palermo, California. A UV Index estimate of 3 to 5 represents a medium vulnerability from unsafe exposure to UV radiation for the average person.Note: The maximum UV index, 3 during December, leads to the following recommendations:
Ensure safety - Recommendations to avert sunburn are presented. To prevent harmful UV exposure, minimize direct contact with the Sun around midday. Clothes that are both tight-knit and comfortably loose are prime choices for sun protection. Remember to consider! The UV radiation from the Sun can be intensified nearly twice by the reflection of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What time of the year is the coldest in Palermo?
What are the temperatures in Palermo in December?
What is the average humidity in December in Palermo?
How much does it rain in Palermo in December?
What is the snowiest month in Palermo?
When does it start to snow in Palermo?
What is the month with the shortest days in Palermo?
What is the average length of the day in December in Palermo?
When is the sunrise / sunset in December in Palermo?
What is the month with the least sunshine in Palermo?
How long on average sun shines in December in Palermo?
What are the months with the lowest UV index in Palermo?
What is the UV index intensity in December in Palermo?
Average temperature in December
Palermo, CA
- Average high temperature in December: 54.5°F
The warmest month (with the highest average high temperature) is July (95.9°F).
The month with the lowest average high temperature is December (54.5°F).
- Average low temperature in December: 40.6°F
The month with the highest average low temperature is July (63.7°F).
The coldest month (with the lowest average low temperature) is December (40.6°F).
Average pressure in December
Palermo, CA
- Average pressure in December: 30.14"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).
Average wind speed in December
Palermo, CA
- Average wind speed in December: 5.3mph
The windiest month (with the highest average wind speed) is March (6.3mph).
The calmest months (with the lowest average wind speed) are August and November (5.2mph).
Average humidity in December
Palermo, CA
- Average humidity in December: 67%
The month with the highest relative humidity is March (72%).
The month with the lowest relative humidity is July (33%).
Average rainfall in December
Palermo, CA
- Average rainfall in December: 4.33"
The wettest month (with the highest rainfall) is March (4.61").
The driest month (with the least rainfall) is July (0.04").
Average rainfall days in December
Palermo, CA
- Average rainfall days in December: 11.1 days
The month with the highest number of rainy days is March (14.3 days).
The month with the least rainy days is July (1.3 days).
Average snowfall days in December
Palermo, CA
- Average snowfall days in December: 0.1 days
The month with the highest number of snowfall days is December (0.1 days).
The months with the least snowfall days are January, February, March, April, May, June, July, August, September, October and November (0 days).
Average daylight in December /
Average sunshine in December
Palermo, CA
- Average daylight in December: 9h and 2min
The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in December: 5h and 5min
The month with the most sunshine is July (Average sunshine: 12h and 6min).
The month with the least sunshine is December (Average sunshine: 5h and 48min).
Average sunshine days in December
Palermo, CA
- Average sunshine days in December: 19.2 days
The month with the most sunshine days is July (29.3 days).
The month with the least sunshine days is March (15.5 days).
Average UV index in December
Palermo, CA
- Average UV index in December: 3
The months with the highest UV index are June and July (UV index 7).
The months with the lowest UV index are January, February, November and December (UV index 3).
Average cloud cover in December
Palermo, CA
- Average cloud cover in December: 35
The month with the most cloud cover is March (Cloud cover 38).
The month with the least cloud cover is July (Cloud cover 4).
Average visibility in December
Palermo, 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).
Palermo, California, USA
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