January weather forecast and climate
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 January

January, the same as December, is another warm summer month in Cape Town, South Africa, with average temperature ranging between min 17.7°C (63.9°F) and max 25.8°C (78.4°F).

Temperature

In Cape Town, South Africa, the average high-temperature is essentially the same as in December - a still moderately hot 25.8°C (78.4°F). In January, in Cape Town, the average low-temperature is 17.7°C (63.9°F).

Humidity

In January, the average relative humidity in Cape Town, South Africa, is 69%.

Rainfall

In Cape Town, during January, the rain falls for 6.7 days and regularly aggregates up to 9mm (0.35") of precipitation. In Cape Town, during the entire year, the rain falls for 111 days and collects up to 435mm (17.13") of precipitation.

Sea temperature

The month with the warmest seawater in Cape Town is January, with an average sea temperature of 18.5°C (65.3°F).
Note: Swimming in 18.5°C (65.3°F) is not enjoyable for the majority. Controlling breathing becomes progressively more difficult as surface water temperature decreases below 21°C (69.8°F).

Daylight

In Cape Town, the average length of the day in January is 14.1h.

Sunshine

The average sunshine in Cape Town is 11h.

UV index

Months with the highest UV index in Cape Town are January, February and December, with an average maximum UV index of 6. A UV Index reading of 6 to 7 represents a high threat to health from unprotected exposure to the Sun's UV rays for average individuals.
Note: In January, the average maximum UV index of 6 translate into the following recommendations:
Take precautions and utilize sun safety practices. Protection against the skin and eye damage is required. 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. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.
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FAQ

What is the temperature in January in Cape Town?

In Cape Town, South Africa, in January, the average high-temperature is 25.8°C (78.4°F), and the average low-temperature is 17.7°C (63.9°F).

What is the average humidity in January in Cape Town?

The average relative humidity in January in Cape Town, South Africa, is 69%.

How much does it rain in Cape Town in January?

In January, in Cape Town, South Africa, the rain falls for 6.7 days. Throughout January, 9mm (0.35") of precipitation is accumulated.

What month is the sea warmest in Cape Town?

January is the month with the warmest seawater in Cape Town, with an average sea temperature of 18.5°C (65.3°F).

How cold is the water in January in Cape Town?

In January, the average sea temperature is 18.5°C (65.3°F). Swimming in 18.5°C (65.3°F) is not enjoyable for the majority. Controlling breathing becomes progressively more difficult as surface water temperature decreases below 21°C (69.8°F).

What is the average length of the day in January in Cape Town?

The average length of the day in January in Cape Town is 14.1h.

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

The average sunshine in January in Cape Town, South Africa, is 11h.

When is the highest UV index in Cape Town?

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

What is the UV index intensity in January in Cape Town?

The average daily maximum UV index in January in Cape Town is 6. A UV Index of 6 to 7 symbolizes a high health vulnerability from the exposure to the Sun's UV rays.

Average temperature in January
Cape Town, South Africa

Average temperature in January - Cape Town, South Africa
  • Average high temperature in January: 25.8°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 January: 17.7°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).

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Average pressure in January
Cape Town, South Africa

Average pressure in January - Cape Town, South Africa
  • Average pressure in January: 1013.6mbar

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

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Average wind speed in January
Cape Town, South Africa

Average wind speed in January - Cape Town, South Africa
  • Average wind speed in January: 17.6km/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).

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Average humidity in January
Cape Town, South Africa

Average humidity in January - Cape Town, South Africa
  • Average humidity in January: 69%

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

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Average rainfall in January
Cape Town, South Africa

Average rainfall in January - Cape Town, South Africa
  • Average rainfall in January: 9mm

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

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Average rainfall days in January
Cape Town, South Africa

Average rainfall days in January - Cape Town, South Africa
  • Average rainfall days in January: 6.7 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).

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Average sea temperature in January
Cape Town, South Africa

Average sea temperature in January - Cape Town, South Africa
  • Average sea temperature in January: 18.5°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).

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

Average daylight in January / Average sunshine in January - Cape Town, South Africa
  • Average daylight in January: 14.1h

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

  • Average sunshine in January: 11h

The month with the most sunshine is December (Average sunshine: 11.1h).
The month with the least sunshine is June (Average sunshine: 6h).

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Average sunshine days in January
Cape Town, South Africa

Average sunshine days in January - Cape Town, South Africa
  • Average sunshine days in January: 23.1 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).

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Average UV index in January
Cape Town, South Africa

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

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

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Average cloud cover in January
Cape Town, South Africa

Average cloud cover in January - Cape Town, South Africa
  • Average cloud cover in January: 17

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

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Average visibility in January
Cape Town, South Africa

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

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

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