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 56.3°F (13.5°C) and a minimum temperature of 46.8°F (8.2°C).Humidity
In Boulder Creek, the average relative humidity in December is 72%.Rainfall
In Boulder Creek, during December, the rain falls for 10 days and regularly aggregates up to 2.44" (62mm) of precipitation. In Boulder Creek, California, during the entire year, the rain falls for 74.2 days and collects up to 13.82" (351mm) of precipitation.Daylight
The month with the shortest days in Boulder Creek is December, with an average of 9h and 42min of daylight.On the first day of December in Boulder Creek, sunrise is at 7:04 am and sunset at 4:51 pm. On the last day of the month, sunrise is at 7:21 am and sunset at 5:01 pm PST.
Sunshine
The month with the least sunshine is December, with an average of 5.9h of sunshine.UV index
February, November and December, with an average maximum UV index of 3, are months with the lowest UV index in Boulder Creek. A UV Index of 3 to 5 symbolizes a medium vulnerability from unprotected exposure to Sun's UV rays for average individuals.Note: A maximum high UV index of 3 in December translates into the following recommendations:
Ensure safety - Sun damage prevention is strongly urged. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. Sun protection is enhanced with clothing that boasts a tight weave yet offers a loose fit.
Frequently asked questions
What part of the year is the coldest in Boulder Creek?
What is the temperature in December in Boulder Creek?
What is the average humidity in December in Boulder Creek?
How many days does it rain in December in Boulder Creek?
What is the month with the shortest days in Boulder Creek?
What is the average length of the day in December in Boulder Creek?
When is the sunrise / sunset in December in Boulder Creek?
What is the month with the least sunshine in Boulder Creek?
How long on average sun shines in December in Boulder Creek?
What are the months with the lowest UV index in Boulder Creek?
How high is the UV index in December in Boulder Creek?
Average temperature in December
Boulder Creek, CA
- Average high temperature in December: 56.3°F
The warmest month (with the highest average high temperature) is August (72.9°F).
The month with the lowest average high temperature is December (56.3°F).
- Average low temperature in December: 46.8°F
The month with the highest average low temperature is September (56.3°F).
The coldest month (with the lowest average low temperature) is February (46.4°F).
Average pressure in December
Boulder Creek, CA
- Average pressure in December: 30.11"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is September (29.92"Hg).
Average wind speed in December
Boulder Creek, CA
- Average wind speed in December: 6.6mph
The windiest month (with the highest average wind speed) is April (7.9mph).
The calmest months (with the lowest average wind speed) are July and August (5.8mph).
Average humidity in December
Boulder Creek, CA
- Average humidity in December: 72%
The month with the highest relative humidity is March (76%).
The months with the lowest relative humidity are October and November (69%).
Average rainfall in December
Boulder Creek, CA
- Average rainfall in December: 2.44"
The wettest month (with the highest rainfall) is February (2.64").
The driest month (with the least rainfall) is July (0.04").
Average rainfall days in December
Boulder Creek, CA
- Average rainfall days in December: 10 days
The month with the highest number of rainy days is March (13.3 days).
The months with the least rainy days are June and August (1.4 days).
Average daylight in December /
Average sunshine in December
Boulder Creek, CA
- Average daylight in December: 9h and 4min
The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 42min).
- Average sunshine in December: 5h and 5min
The month with the most sunshine is July (Average sunshine: 12h and 0min).
The month with the least sunshine is December (Average sunshine: 5h and 54min).
Average sunshine days in December
Boulder Creek, CA
- Average sunshine days in December: 19.6 days
The month with the most sunshine days is June (27.3 days).
The month with the least sunshine days is March (16.6 days).
Average UV index in December
Boulder Creek, CA
- Average UV index in December: 3
The months with the highest UV index are June, July, August and September (UV index 5).
The months with the lowest UV index are February, November and December (UV index 3).
Average cloud cover in December
Boulder Creek, CA
- Average cloud cover in December: 33
The month with the most cloud cover is March (Cloud cover 35).
The month with the least cloud cover is July (Cloud cover 11).
Average visibility in December
Boulder Creek, 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).
Boulder Creek, California, USA
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