December weather forecast
Capetown, CA

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Weather in December

The first month of the winter, December, is still a cool month in Capetown, California, with temperature in the range of an average low of 40.1°F (4.5°C) and an average high of 52.9°F (11.6°C).

Temperature

December, with an average high of 52.9°F (11.6°C) and a low of 40.1°F (4.5°C), signifies the coldest month of the year.

Humidity

In Capetown, the average relative humidity in December is 81%.

Rainfall

December is the month with the most rainfall. Rain falls for 14.8 days and accumulates 4.96" (126mm) of precipitation.

Snowfall

January, March through December are months without snowfall.

Daylight

December has the shortest days of the year, with an average of 9h and 18min of daylight.
On the first day of the month, sunrise is at 7:22 am and sunset at 4:51 pm. On the last day of December, sunrise is at 7:40 am and sunset at 5:01 pm PST.

Sunshine

The month with the least sunshine is December, with an average of 5h of sunshine.

UV index

The months with the lowest UV index are January through March, November and December, with an average maximum UV index of 3. A UV Index value of 3 to 5 symbolizes a medium health hazard from unprotected exposure to Sun's UV rays for average individuals.
Note: In December, a daily maximum UV index of 3 leads to the following instructions:
Take precautions - Protection against skin and eye damage is obliged. To prevent harmful UV exposure, minimize direct contact with the Sun around midday. For minimizing sun-related eye damage, always choose sunglasses with UVA and UVB coverage. Note well! The intensity of the Sun's UV rays can be nearly doubled by snow reflection.
Updated: Aug 30, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What are the coldest months?

In Capetown, December is the month with the lowest recorded average temperatures, measuring a high of 52.9°F (11.6°C) and a low of 40.1°F (4.5°C).

What is the average December temperature?

The high-temperature, in December, in Capetown, is 52.9°F (11.6°C), while the low-temperature averages to 40.1°F (4.5°C).

What is the average humidity in December?

The average relative humidity in December is 81%.

What is the wettest month?

The month with the most rainfall in Capetown is December, when the rain falls for 14.8 days and typically aggregates up to 4.96" (126mm) of precipitation.

How many days does it rain in December?

In Capetown, in December, it is raining for 14.8 days, with typically 4.96" (126mm) of accumulated precipitation.

When it does not snow?

January, March through December are months without snowfall.

What is the month with the shortest days?

The month with the shortest days is December, with an average of 9h and 18min of daylight.

What is the average length of the day in December?

The average day length in December is 9h and 20min.

What time are sunrise and sunset in December?

In December, on the first day of the month, sunrise is at 7:22 am and sunset at 4:51 pm. On the last day of the month, sunrise is at 7:40 am and sunset at 5:01 pm PST.

What is the month with the least sunshine?

December has the least sunshine of the year, with an average of 5h of sunshine.

How many hours of sunshine does Capetown have in December?

In Capetown, California, the average sunshine duration in December is 5h.

What are the months with the lowest UV index?

January through March, November and December, with an average maximum UV index of 3, are months with the lowest UV index.

What is the UV index reading in December?

In Capetown, the average daily maximum UV index in December is 3. A UV Index of 3 to 5 symbolizes a medium hazard to health from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in December
Capetown, CA

Average temperature in December - Capetown, CA
  • Average high temperature in December: 52.9°F

The warmest month (with the highest average high temperature) is August (74.1°F).
The month with the lowest average high temperature is December (52.9°F).

  • Average low temperature in December: 40.1°F

The month with the highest average low temperature is August (51.8°F).
The coldest month (with the lowest average low temperature) is February (39.7°F).

Average pressure in December
Capetown, CA

Average pressure in December - Capetown, 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 August and September (29.96"Hg).

Average wind speed in December
Capetown, CA

Average wind speed in December - Capetown, CA
  • Average wind speed in December: 7mph

The windiest month (with the highest average wind speed) is June (7.7mph).
The calmest month (with the lowest average wind speed) is August (5.9mph).

Average humidity in December
Capetown, CA

Average humidity in December - Capetown, CA
  • Average humidity in December: 81%

The month with the highest relative humidity is March (83%).
The month with the lowest relative humidity is September (73%).

Average rainfall in December
Capetown, CA

Average rainfall in December - Capetown, CA
  • Average rainfall in December: 4.96"

The wettest month (with the highest rainfall) is December (4.96").
The driest month (with the least rainfall) is July (0.08").

Average rainfall days in December
Capetown, CA

Average rainfall days in December - Capetown, CA
  • Average rainfall days in December: 14.8 days

The month with the highest number of rainy days is March (17.3 days).
The months with the least rainy days are July and August (1.8 days).

Average snowfall in December
Capetown, CA

Average snowfall in December - Capetown, CA
  • Average snowfall in December: 0"

The month with the highest snowfall is February (0.59").
The months with the least snowfall are January, March, April, May, June, July, August, September, October, November and December (0").

Average snowfall days in December
Capetown, CA

Average snowfall days in December - Capetown, CA
  • Average snowfall days in December: 0.1 days

The month with the highest number of snowfall days is February (0.3 days).
The months with the least snowfall days are January, March, April, May, June, July, August, September, October and November (0 days).

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

Average daylight in December / Average sunshine in December - Capetown, CA
  • Average daylight in December: 9h and 2min

The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 18min).

  • Average sunshine in December: 5h and 0min

The months with the most sunshine are July and August (Average sunshine: 11h and 36min).
The month with the least sunshine is December (Average sunshine: 5h and 0min).

Average sunshine days in December
Capetown, CA

Average sunshine days in December - Capetown, CA
  • Average sunshine days in December: 15.1 days

The month with the most sunshine days is July (28.5 days).
The month with the least sunshine days is March (11.9 days).

Average UV index in December
Capetown, CA

Average UV index in December - Capetown, CA
  • Average UV index in December: 3

The months with the highest UV index are June, July and August (UV index 5).
The months with the lowest UV index are January, February, March, November and December (UV index 3).

Average cloud cover in December
Capetown, CA

Average cloud cover in December - Capetown, CA
  • Average cloud cover in December: 45

The month with the most cloud cover is March (Cloud cover 48).
The month with the least cloud cover is August (Cloud cover 16).

Average visibility in December
Capetown, CA

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

The months with the highest visibility are January, February, March, April, June, September, October, November and December (6mi).
The months with the lowest visibility are May, July and August (5mi).

Capetown, California, USA

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