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 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
February and December, with an average high-temperature of 59.9°F (15.5°C), are the coldest months.Humidity
In December, the average relative humidity is 58%.Rainfall
In December, in Somis, the rain falls for 5.4 days. Throughout December, 1.22" (31mm) of precipitation is accumulated. Throughout the year, there are 47.4 rainfall days, and 7.36" (187mm) of precipitation is accumulated.Daylight
December has the shortest days of the year, with an average of 9h and 54min of daylight.On the first day of December, sunrise is at 6:44 am and sunset at 4:46 pm. On the last day of the month, sunrise is at 7:01 am and sunset at 4:56 pm PST.
Sunshine
January, February and December, with an average of 6.8h of sunshine, are months with the least sunshine.UV index
January through April, November and December, with an average maximum UV index of 4, are months with the lowest UV index. A UV Index reading of 3 to 5 represents a medium health hazard from exposure to the Sun's UV rays for the ordinary person.Note: A maximum high UV index of 4 in December translates into the following recommendations:
Prioritize safety - Suggestions to prevent sun damage are offered. To protect against the Sun's most potent rays, avoid direct exposure around midday. A hat with a generous brim can prevent nearly 50% of UV rays from reaching your eyes.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the coldest months?
What is the average December temperature?
What is the average humidity in December?
How much does it rain in December?
What is the month with the shortest days?
How many hours of daylight does Somis have in December?
What time are sunrise and sunset in December?
What are the months with the least sunshine?
How many hours of sunshine does Somis have in December?
What is the month with the lowest UV index?
What is the UV index reading in December?
Average temperature in December
Somis, CA
- Average high temperature in December: 59.9°F
The warmest month (with the highest average high temperature) is August (75.9°F).
The months with the lowest average high temperature are February and December (59.9°F).
- Average low temperature in December: 49.5°F
The month with the highest average low temperature is August (63°F).
The coldest month (with the lowest average low temperature) is February (48.9°F).
Average pressure in December
Somis, CA
- Average pressure in December: 30.08"Hg
The month with the highest atmospheric pressure is January (30.11"Hg).
The months with the lowest atmospheric pressure are June and September (29.9"Hg).
Average wind speed in December
Somis, CA
- Average wind speed in December: 6.6mph
The windiest month (with the highest average wind speed) is April (6.8mph).
The calmest months (with the lowest average wind speed) are August and September (4.7mph).
Average humidity in December
Somis, CA
- Average humidity in December: 58%
The month with the highest relative humidity is June (69%).
The month with the lowest relative humidity is November (55%).
Average rainfall in December
Somis, CA
- Average rainfall in December: 1.22"
The wettest month (with the highest rainfall) is January (1.38").
The driest months (with the least rainfall) are June and August (0.12").
Average rainfall days in December
Somis, CA
- Average rainfall days in December: 5.4 days
The month with the highest number of rainy days is March (6.4 days).
The month with the least rainy days is August (1.7 days).
Average daylight in December /
Average sunshine in December
Somis, CA
- Average daylight in December: 9h and 5min
The month with the longest days is June (Average daylight: 14h and 24min).
The month with the shortest days is December (Average daylight: 9h and 54min).
- Average sunshine in December: 6h and 5min
The months with the most sunshine are June, July and August (Average sunshine: 12h and 0min).
The months with the least sunshine are January, February and December (Average sunshine: 6h and 48min).
Average sunshine days in December
Somis, CA
- Average sunshine days in December: 24.7 days
The month with the most sunshine days is October (26.1 days).
The month with the least sunshine days is February (22 days).
Average UV index in December
Somis, CA
- Average UV index in December: 4
The months with the highest UV index are July and August (UV index 6).
The months with the lowest UV index are January, February, March, April, November and December (UV index 4).
Average cloud cover in December
Somis, CA
- Average cloud cover in December: 22
The months with the most cloud cover are March and December (Cloud cover 22).
The month with the least cloud cover is August (Cloud cover 5).
Average visibility in December
Somis, 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).
Somis, California, USA
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