December weather forecast
Cape Town, South Africa

Cape Town, South Africa, with the surrounding calm clear waters and several mountains
Cape Town, South Africa, with the surrounding calm clear waters and several mountains

Weather in December

The first month of the summer, December, is a warm month in Cape Town, South Africa, with an average temperature fluctuating between 16.3°C (61.3°F) and 24.3°C (75.7°F).

Temperature

In December, the average high-temperature is practically the same as in November - a moderately hot 24.3°C (75.7°F). In Cape Town, in December, the average low-temperature is 16.3°C (61.3°F).

Humidity

The months with the lowest humidity in Cape Town are February, April and December, with an average relative humidity of 68%.

Rainfall

In Cape Town, during 6.4 rainfall days, 16mm (0.63") of precipitation is typically accumulated. In Cape Town, during the entire year, the rain falls for 111 days and collects up to 435mm (17.13") of precipitation.

Sea temperature

In December, the average sea temperature is 18.1°C (64.6°F).
Note: For swimming, a surface water temperature of 18.1°C (64.6°F) is not enjoyable for the majority. It is not considered safe, as controlling breathing becomes progressively more difficult as water temperature decreases below 21°C (69.8°F).

Daylight

December has the longest days of the year, with an average of 14h and 22min of daylight.
On the first day of the month, sunrise is at 05:28 and sunset at 19:42. On the last day of December, in Cape Town, South Africa, sunrise is at 05:37 and sunset at 20:00 SAST.

Sunshine

December has the most sunshine of the year in Cape Town, with an average of 11.1h of sunshine.

UV index

January, February and December, with an average maximum UV index of 6, are months with the highest UV index. A UV Index estimate of 6 to 7 represents a high health vulnerability from unsafe exposure to UV radiation for average individuals.
Note: In December, the average maximum UV index of 6 translate into the following recommendations:
Take precautions and adopt sun safety practices. Protection against sunburn is obliged. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. 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.
[Resources]

FAQ

What is the temperature in December in Cape Town?

In December, in Cape Town, the average high-temperature is 24.3°C (75.7°F), and the average low-temperature is 16.3°C (61.3°F).

What is the least humid month in Cape Town?

February, April and December, with an average relative humidity of 68%, are the least humid months in Cape Town.

What is the average humidity in December in Cape Town?

The average relative humidity in December in Cape Town is 68%.

How many days does it rain in December in Cape Town?

In Cape Town, South Africa, in December, it is raining for 6.4 days, with typically 16mm (0.63") of accumulated precipitation.

What is the sea temperature in December in Cape Town?

In December, the average sea temperature in Cape Town is 18.1°C (64.6°F). For swimming, a surface water temperature of 18.1°C (64.6°F) is not enjoyable for the majority. It is not considered safe, as controlling breathing becomes progressively more difficult as water temperature decreases below 21°C (69.8°F).

When are the longest days in Cape Town?

The month with the longest days is December, with an average of 14h and 22min of daylight.

How many hours of daylight does Cape Town have in December?

In December, the average day length is 14h and 22min.

When is the sunrise / sunset in December in Cape Town?

In December, on the first day of the month, sunrise is at 05:28 and sunset at 19:42. On the last day of the month, in Cape Town, South Africa, sunrise is at 05:37 and sunset at 20:00 SAST.

What month has the most sunshine in Cape Town?

The month with the most sunshine in Cape Town is December, with an average of 11.1h of sunshine.

How many hours of sunshine does Cape Town have in December?

In Cape Town, the average sunshine duration in December is 11.1h.

What are the months with the highest UV index in Cape Town?

The months with the highest UV index are January, February and December, with an average maximum UV index of 6.

How high is the UV index in December in Cape Town?

In December, the average daily maximum UV index in Cape Town, South Africa, is 6. A UV Index of 6 to 7 symbolizes a high health vulnerability from unsafe exposure to Sun's UV rays.

Average temperature in December
Cape Town, South Africa

Average temperature in December - Cape Town, South Africa
  • Average high temperature in December: 24.3°C

The warmest month (with the highest average high temperature) is February (26.1°C).
The month with the lowest average high temperature is August (16.6°C).

  • Average low temperature in December: 16.3°C

The month with the highest average low temperature is January (17.7°C).
The coldest months (with the lowest average low temperature) are July and August (10.2°C).

[Resources]

Average pressure in December
Cape Town, South Africa

Average pressure in December - Cape Town, South Africa
  • Average pressure in December: 1014.3mbar

The month with the highest atmospheric pressure is July (1022mbar).
The month with the lowest atmospheric pressure is February (1013.4mbar).

[Resources]

Average wind speed in December
Cape Town, South Africa

Average wind speed in December - Cape Town, South Africa
  • Average wind speed in December: 17.3km/h

The windiest month (with the highest average wind speed) is January (17.6km/h).
The calmest month (with the lowest average wind speed) is May (13.4km/h).

[Resources]

Average humidity in December
Cape Town, South Africa

Average humidity in December - Cape Town, South Africa
  • Average humidity in December: 68%

The months with the highest relative humidity are June, August and September (74%).
The months with the lowest relative humidity are February, April and December (68%).

[Resources]

Average rainfall in December
Cape Town, South Africa

Average rainfall in December - Cape Town, South Africa
  • Average rainfall in December: 16mm

The wettest month (with the highest rainfall) is June (98mm).
The driest month (with the least rainfall) is February (7mm).

[Resources]

Average rainfall days in December
Cape Town, South Africa

Average rainfall days in December - Cape Town, South Africa
  • Average rainfall days in December: 6.4 days

The month with the highest number of rainy days is June (13.8 days).
The month with the least rainy days is February (4.9 days).

[Resources]

Average sea temperature in December
Cape Town, South Africa

Average sea temperature in December - Cape Town, South Africa
  • Average sea temperature in December: 18.1°C

The best month for swimming (with the highest average sea temperature) is January (18.5°C).
The coldest months (with the lowest average sea temperature) are July, August and September (15.3°C).

[Resources]

Average daylight in December /
Average sunshine in December
Cape Town, South Africa

Average daylight in December / Average sunshine in December - Cape Town, South Africa
  • Average daylight in December: 14h and 22min

The month with the longest days is December (Average daylight: 14h and 22min).
The month with the shortest days is June (Average daylight: 9h and 56min).

  • Average sunshine in December: 11h and 6min

The month with the most sunshine is December (Average sunshine: 11h and 6min).
The month with the least sunshine is June (Average sunshine: 6h and 0min).

[Resources]

Average sunshine days in December
Cape Town, South Africa

Average sunshine days in December - Cape Town, South Africa
  • Average sunshine days in December: 22.6 days

The month with the most sunshine days is January (23.1 days).
The month with the least sunshine days is June (14.6 days).

[Resources]

Average UV index in December
Cape Town, South Africa

Average UV index in December - Cape Town, South Africa
  • Average UV index in December: 6

The months with the highest UV index are January, February and December (UV index 6).
The months with the lowest UV index are May, June, July, August and September (UV index 4).

[Resources]

Average cloud cover in December
Cape Town, South Africa

Average cloud cover in December - Cape Town, South Africa
  • Average cloud cover in December: 19

The month with the most cloud cover is June (Cloud cover 34).
The month with the least cloud cover is February (Cloud cover 15).

[Resources]

Average visibility in December
Cape Town, South Africa

Average visibility in December - Cape Town, South Africa
  • Average visibility in December: 10km

The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).

[Resources]

Weather forecast for your location

1. Click Locate me button
2. Allow the app to use your location
* you will be automatically redirected to the weather forecast for your location