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
December brings the lowest temperatures, with an average high of 61.2°F (16.2°C) and an average low of 46.8°F (8.2°C).Humidity
In Shell Beach, the average relative humidity in December is 63%.Rainfall
In Shell Beach, California, during December, the rain falls for 6.4 days and regularly aggregates up to 1.02" (26mm) of precipitation. Throughout the year, in Shell Beach, there are 47.6 rainfall days, and 6.93" (176mm) of precipitation is accumulated.Daylight
The month with the shortest days is December, with an average of 9h and 48min of daylight.On the first day of December, sunrise is at 6:53 am and sunset at 4:50 pm. On the last day of the month, sunrise is at 7:10 am and sunset at 5:01 pm PST.
Sunshine
February and December, with an average of 6.5h of sunshine, are months with the least sunshine.UV index
January through March, November and December, with an average maximum UV index of 4, are months with the lowest UV index. A UV Index value of 3 to 5 symbolizes a medium vulnerability from unsafe exposure to UV radiation for the ordinary person.Note: In December, a regular UV index of 4 translates into these guidelines:
Undertake protective steps - Preventing sun damage is advised. Sun's radiation is most powerful around mid-day, so it's best to limit outdoor activities during this time. Limit sun-induced ocular harm with sunglasses that feature UVA and UVB filtration.
Frequently asked questions
What part of the year is the coldest in Shell Beach?
What are December temperatures in Shell Beach?
What is the average humidity in December in Shell Beach?
How much does it rain in Shell Beach in December?
What is the month with the shortest days in Shell Beach?
How many hours of daylight does Shell Beach have in December?
When is the sunrise / sunset in December in Shell Beach?
What are the months with the least sunshine in Shell Beach?
How long on average sun shines in December in Shell Beach?
What is the month with the lowest UV index in Shell Beach?
How high is the UV index in December in Shell Beach?
Average temperature in December
Shell Beach, CA
- Average high temperature in December: 61.2°F
The warmest month (with the highest average high temperature) is September (79.5°F).
The month with the lowest average high temperature is December (61.2°F).
- Average low temperature in December: 46.8°F
The month with the highest average low temperature is September (59.9°F).
The coldest month (with the lowest average low temperature) is February (46°F).
Average pressure in December
Shell Beach, CA
- Average pressure in December: 30.09"Hg
The month with the highest atmospheric pressure is January (30.12"Hg).
The months with the lowest atmospheric pressure are June, August and September (29.91"Hg).
Average wind speed in December
Shell Beach, CA
- Average wind speed in December: 6.5mph
The windiest months (with the highest average wind speed) are April and May (7.3mph).
The calmest month (with the lowest average wind speed) is August (5.7mph).
Average humidity in December
Shell Beach, CA
- Average humidity in December: 63%
The month with the highest relative humidity is March (68%).
The month with the lowest relative humidity is October (58%).
Average rainfall in December
Shell Beach, CA
- Average rainfall in December: 1.02"
The wettest month (with the highest rainfall) is March (1.61").
The driest months (with the least rainfall) are June and August (0.04").
Average rainfall days in December
Shell Beach, CA
- Average rainfall days in December: 6.4 days
The month with the highest number of rainy days is March (8.4 days).
The month with the least rainy days is August (0.8 days).
Average daylight in December /
Average sunshine in December
Shell Beach, CA
- Average daylight in December: 9h and 5min
The month with the longest days is June (Average daylight: 14h and 30min).
The month with the shortest days is December (Average daylight: 9h and 48min).
- Average sunshine in December: 6h and 3min
The months with the most sunshine are June, July and August (Average sunshine: 12h and 0min).
The months with the least sunshine are February and December (Average sunshine: 6h and 30min).
Average sunshine days in December
Shell Beach, CA
- Average sunshine days in December: 24 days
The month with the most sunshine days is August (29.6 days).
The month with the least sunshine days is February (21 days).
Average UV index in December
Shell Beach, CA
- Average UV index in December: 4
The months with the highest UV index are June and August (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 4).
Average cloud cover in December
Shell Beach, CA
- Average cloud cover in December: 25
The month with the most cloud cover is March (Cloud cover 27).
The month with the least cloud cover is August (Cloud cover 6).
Average visibility in December
Shell Beach, 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).
Shell Beach, California, USA
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