December weather forecastCypress, CA
December
Weather in December
The first month of the winter, December, is also an enjoyable month in Cypress, California, with temperature in the range of an average high of 63.9°F (17.7°C) and an average low of 52.3°F (11.3°C).Temperature
December, having an average high-temperature of 63.9°F (17.7°C) and an average low-temperature of 52.3°F (11.3°C), is the coldest month.Humidity
The average relative humidity in December is 57%.Rainfall
The month with the most rainfall is December, when the rain falls for 4.9 days and typically aggregates up to 0.59" (15mm) of precipitation.Daylight
With an average of 9h and 54min of daylight, December has the shortest days of the year.On the first day of the month, sunrise is at 6:39 am and sunset at 4:43 pm. On the last day of December, in Cypress, sunrise is at 6:56 am and sunset at 4:54 pm PST.
Sunshine
The month with the least sunshine is December, with an average of 6.7h of sunshine.UV index
February, 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 moderate health risk from exposure to the Sun's UV rays for the ordinary person.Note: In December, the UV index of 4 transforms into the following advice:
Be cautious. Those with fair skin can be subjected to burns in fewer than 30 minutes. During midday, the Sun's radiation is strongest, and it's advisable to reduce direct exposure. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Cypress, CA
- Average high temperature in December: 63.9°F
The warmest month (with the highest average high temperature) is August (81°F).
The month with the lowest average high temperature is December (63.9°F).
- Average low temperature in December: 52.3°F
The month with the highest average low temperature is August (65.5°F).
The coldest month (with the lowest average low temperature) is February (51.6°F).
Average pressure in December
Cypress, CA
- Average pressure in December: 30.07"Hg
The month with the highest atmospheric pressure is January (30.1"Hg).
The months with the lowest atmospheric pressure are June and September (29.89"Hg).
Average wind speed in December
Cypress, CA
- Average wind speed in December: 5.4mph
The windiest month (with the highest average wind speed) is April (6.3mph).
The calmest months (with the lowest average wind speed) are September and October (5mph).
Average humidity in December
Cypress, CA
- Average humidity in December: 57%
The month with the highest relative humidity is June (69%).
The month with the lowest relative humidity is November (54%).
Average rainfall in December
Cypress, CA
- Average rainfall in December: 0.59"
The wettest month (with the highest rainfall) is December (0.59").
The driest month (with the least rainfall) is June (0").
Average rainfall days in December
Cypress, CA
- Average rainfall days in December: 4.9 days
The month with the highest number of rainy days is March (5.6 days).
The month with the least rainy days is June (0.6 days).
Average daylight in December /
Average sunshine in December
Cypress, CA
- Average daylight in December: 9h and 54min
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 42min
The months with the most sunshine are July and August (Average sunshine: 12h and 0min).
The month with the least sunshine is December (Average sunshine: 6h and 42min).
Average sunshine days in December
Cypress, CA
- Average sunshine days in December: 24.5 days
The month with the most sunshine days is June (28.6 days).
The month with the least sunshine days is February (23 days).
Average UV index in December
Cypress, CA
- Average UV index in December: 4
The months with the highest UV index are June, July, August and September (UV index 6).
The months with the lowest UV index are February, November and December (UV index 4).
Average cloud cover in December
Cypress, CA
- Average cloud cover in December: 23
The month with the most cloud cover is December (Cloud cover 23).
The month with the least cloud cover is August (Cloud cover 6).
Average visibility in December
Cypress, 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).
