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 proves to be the coldest month, recording an average maximum temperature of 57.4°F (14.1°C) and a minimum temperature of 40.3°F (4.6°C).Humidity
The average relative humidity in December is 70%.Rainfall
December is the month with the most rainfall. Rain falls for 8.5 days and accumulates 1.57" (40mm) of precipitation.Daylight
December has the shortest days of the year in Hollister, with an average of 9h and 42min of daylight.On the first day of December, sunrise is at 7:00 am and sunset at 4:49 pm. On the last day of the month, sunrise is at 7:18 am and sunset at 4:59 pm PST.
Sunshine
The month with the least sunshine is December, with an average of 6.1h of sunshine.UV index
January, February, November and December, with an average maximum UV index of 3, are months with the lowest UV index. A UV Index reading of 3 to 5 represents a medium health hazard from unprotected exposure to Sun's UV rays for the average person.Note: An average maximum UV index of 3 in December leads to these recommendations:
Exercise care. People with light skin might get burns in fewer than 30 minutes. When the Sun's UV radiation is most intense during midday, it's best to find shade and limit exposure. Wearing a wide-brim hat can block approximately 50% of UV radiation, protecting the eyes.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the coldest month?
What are the temperatures in December?
What is the average humidity in December?
What is the rainiest month?
How much does it rain in December?
What is the month with the shortest days?
How many hours of daylight does Hollister have in December?
When is the sunrise / sunset in December?
What is the month with the least sunshine?
How many hours of sunshine does Hollister have in December?
What are the months with the lowest UV index?
How high is the UV index in December?
Average temperature in December
Hollister, CA
- Average high temperature in December: 57.4°F
The warmest month (with the highest average high temperature) is July (87.8°F).
The month with the lowest average high temperature is December (57.4°F).
- Average low temperature in December: 40.3°F
The month with the highest average low temperature is August (55.4°F).
The coldest months (with the lowest average low temperature) are March and December (40.3°F).
Average pressure in December
Hollister, CA
- Average pressure in December: 30.11"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The months with the lowest atmospheric pressure are June, August and September (29.92"Hg).
Average wind speed in December
Hollister, CA
- Average wind speed in December: 3.9mph
The windiest month (with the highest average wind speed) is May (5.5mph).
The calmest month (with the lowest average wind speed) is November (3.7mph).
Average humidity in December
Hollister, CA
- Average humidity in December: 70%
The month with the highest relative humidity is March (73%).
The month with the lowest relative humidity is July (53%).
Average rainfall in December
Hollister, CA
- Average rainfall in December: 1.57"
The wettest month (with the highest rainfall) is December (1.57").
The driest months (with the least rainfall) are July and August (0.04").
Average rainfall days in December
Hollister, CA
- Average rainfall days in December: 8.5 days
The month with the highest number of rainy days is March (11.6 days).
The month with the least rainy days is August (0.3 days).
Average daylight in December /
Average sunshine in December
Hollister, CA
- Average daylight in December: 9h and 4min
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 42min).
- Average sunshine in December: 6h and 1min
The month with the most sunshine is July (Average sunshine: 12h and 6min).
The month with the least sunshine is December (Average sunshine: 6h and 6min).
Average sunshine days in December
Hollister, CA
- Average sunshine days in December: 21.1 days
The month with the most sunshine days is August (30.3 days).
The month with the least sunshine days is March (18.6 days).
Average UV index in December
Hollister, CA
- Average UV index in December: 3
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 3).
Average cloud cover in December
Hollister, CA
- Average cloud cover in December: 33
The month with the most cloud cover is March (Cloud cover 34).
The months with the least cloud cover are July and August (Cloud cover 5).
Average visibility in December
Hollister, 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).
Hollister, California, USA
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