December weather forecast
Cypress, CA

Weather in December

December, the first month of the winter, in Cypress, is still a comfortable month, with average temperature ranging between max 63.9°F (17.7°C) and min 52.3°F (11.3°C).

Temperature

With an average high-temperature of 63.9°F (17.7°C) and an average low-temperature of 52.3°F (11.3°C), December is the coldest month.

Humidity

In December, the average relative humidity is 57%.

Rainfall

The month with the most rainfall in Cypress is December when the rain falls for 4.9 days and typically aggregates up to 0.59" (15mm) of precipitation.

Daylight

The month with the shortest days in Cypress is December, with an average of 9.9h of daylight.

Sunshine

December has the least sunshine of the year in Cypress, 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 in Cypress. A UV Index value of 3 to 5 symbolizes a medium health hazard from unsafe exposure to the UV radiation for average individuals.
Note: The average daily UV index of 4 in December transform into the following instructions:
Take precautions. Light skin individuals may get burned in less than 30 minutes. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.
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FAQ

What is the coldest month in Cypress?

The coldest month in Cypress is December, with an average high-temperature of 63.9°F (17.7°C) and an average low-temperature of 52.3°F (11.3°C).

What is the average humidity in December in Cypress?

In Cypress, California, the average relative humidity in December is 57%.

What is the rainiest month in Cypress?

December is the month with the most rainfall. Rain falls for 4.9 days and accumulates 0.59" (15mm) of precipitation.

How much does it rain in Cypress in December?

In Cypress, in December, it is raining for 4.9 days, with typically 0.59" (15mm) of accumulated precipitation.

What is the month with the shortest days in Cypress?

December has the shortest days of the year in Cypress, with an average of 9.9h of daylight.

How many hours of daylight does Cypress have in December?

In Cypress, California, the average length of the day in December is 9.9h.

What is the month with the least sunshine in Cypress?

December has the least sunshine of the year in Cypress, with an average of 6.7h of sunshine.

How long on average sun shines in December in Cypress?

The average sunshine in December is 6.7h.

What are the months with the lowest UV index in Cypress?

February, November and December, with an average maximum UV index of 4, are months with the lowest UV index in Cypress.

How high is the UV index in December in Cypress?

The average daily maximum UV index in December in Cypress, California, is 4. A UV Index reading of 3 to 5 represents a medium hazard to health from the exposure to the Sun's UV radiation.

Average temperature in December
Cypress, CA

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).

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Average pressure in December
Cypress, CA

Average pressure in December - Cypress, CA
  • Average pressure in December: 30.07"

The month with the highest atmospheric pressure is January (30.1").
Months with the lowest atmospheric pressure are June and September (29.89").

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Average wind speed in December
Cypress, CA

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).

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Average humidity in December
Cypress, CA

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%).

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Average rainfall in December
Cypress, CA

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").

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Average rainfall days in December
Cypress, CA

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).

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Average daylight in December /
Average sunshine in December
Cypress, CA

Average daylight in December / Average sunshine in December - Cypress, CA
  • Average daylight in December: 9.9h

The month with the longest days is June (Average daylight: 14.4h).
The month with the shortest days is December (Average daylight: 9.9h).

  • Average sunshine in December: 6.7h

Months with the most sunshine are July and August (Average sunshine: 12h).
The month with the least sunshine is December (Average sunshine: 6.7h).

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Average sunshine days in December
Cypress, CA

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).

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Average UV index in December
Cypress, CA

Average UV index in December - Cypress, CA
  • Average UV index in December: 4

Months with the highest UV index are June, July, August and September (UV index 6).
Months with the lowest UV index are February, November and December (UV index 4).

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Average cloud cover in December
Cypress, CA

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).

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Average visibility in December
Cypress, CA

Average visibility in December - Cypress, CA
  • Average visibility in December: 6mi

Months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

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