January 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 January

January, like December, in Cape Town, South Africa, is a moderately hot summer month, with an average temperature ranging between min 17.7°C (63.9°F) and max 25.8°C (78.4°F).

Temperature

In January, the average high-temperature is almost the same as in December - a still warm 25.8°C (78.4°F). In January, the average low-temperature is 17.7°C (63.9°F).

Humidity

In January, the average relative humidity is 69%.

Rainfall

In Cape Town, in January, it is raining for 6.7 days, with typically 9mm (0.35") of accumulated precipitation. Throughout the year, in Cape Town, there are 111 rainfall days, and 435mm (17.13") of precipitation is accumulated.

Sea temperature

January is the month with the warmest seawater in Cape Town, 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 January, the average length of the day is 14h and 7min.
On the first day of the month, sunrise is at 05:38 and sunset at 20:00. On the last day of January, sunrise is at 06:06 and sunset at 19:52 SAST.

Sunshine

In Cape Town, the average sunshine in January is 11h.

UV index

January, February and December, with an average maximum UV index of 6, are months with the highest UV index in Cape Town, South Africa. A UV Index estimate of 6 to 7 represents a high health vulnerability from unprotected exposure to Sun's UV rays for the ordinary person.
Note: The average daily UV index of 6 in January transform into the following instructions:
Take precautions and utilize sun safety practices. Protection against skin and eye damage is required. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun.
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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?

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

How much does it rain in Cape Town in January?

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

When is the sea warmest in Cape Town?

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

What is the sea water temperature in January in Cape Town?

In January, the average sea temperature in Cape Town is 18.5°C (65.3°F). For most, swimming in 18.5°C (65.3°F) is not an enjoyable activity. Furthermore, controlling your breathing becomes progressively more difficult as the water temperature decreases from 21°C (69.8°F) to 15°C (59°F).

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

In Cape Town, the average day length in January is 14h and 7min.

What time are sunrise and sunset in January in Cape Town?

On the first day of January in Cape Town, sunrise is at 05:38 and sunset at 20:00. On the last day of the month, sunrise is at 06:06 and sunset at 19:52 SAST.

How long on average sun shines in January in Cape Town?

In January, the average sunshine duration in Cape Town is 11h.

What is the month with the highest UV index in Cape Town?

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

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

In January, the average daily maximum UV index in Cape Town is 6. A UV Index value of 6 to 7 symbolizes a high hazard to health from unprotected exposure to UV radiation.

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%

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%).

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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: 14h and 7min

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 January: 11h and 0min

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).

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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

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).

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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

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).

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