May 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 May

The last month of the autumn, May, is also an enjoyable month in Cape Town, South Africa, with temperature in the range of an average low of 13.1°C (55.6°F) and an average high of 19.7°C (67.5°F).

Temperature

In May, the average high-temperature is relatively the same as in April - an enjoyable 19.7°C (67.5°F). In May, in Cape Town, the average low-temperature is 13.1°C (55.6°F).

Humidity

In Cape Town, the average relative humidity in May is 73%.

Rainfall

In Cape Town, during May, the rain falls for 11.1 days and regularly aggregates up to 46mm (1.81") 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

In Cape Town, South Africa, the average seawater temperature is 16.4°C (61.5°F).
Note: For most, swimming in 16.4°C (61.5°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).

Daylight

The average length of the day in Cape Town is 10.4h.

Sunshine

In May, the average sunshine in Cape Town is 6.5h.

UV index

May through September, with an average maximum UV index of 4, are months with the lowest UV index. A UV Index of 3 to 5 symbolizes a medium vulnerability from unsafe exposure to the UV radiation for the ordinary person.
Note: The daily maximum UV index of 4 interpret into the following advice:
Take precautions. Light skin individuals may get burned in less than 30 minutes. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. 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 average humidity in May in Cape Town?

In May, the average relative humidity in Cape Town is 73%.

How much does it rain in Cape Town in May?

In Cape Town, South Africa, in May, during 11.1 rainfall days, 46mm (1.81") of precipitation is typically accumulated.

How cold is the water in May in Cape Town?

In Cape Town, in May, the average water temperature is 16.4°C (61.5°F). Swimming in 16.4°C (61.5°F) is not enjoyable for the majority. Controlling breathing becomes progressively more difficult as surface water temperature decreases below 21°C (69.8°F).

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

In May, the average length of the day in Cape Town, South Africa, is 10.4h.

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

The average sunshine in May in Cape Town is 6.5h.

When is the lowest UV index in Cape Town?

May through September, with an average maximum UV index of 4, are months with the lowest UV index in Cape Town.

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

In Cape Town, South Africa, the average daily maximum UV index in May is 4. A UV Index value of 3 to 5 symbolizes a moderate vulnerability from unsafe exposure to the Sun's UV rays.

Average temperature in May
Cape Town, South Africa

Average temperature in May - Cape Town, South Africa
  • Average high temperature in May: 19.7°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 May: 13.1°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 May
Cape Town, South Africa

Average pressure in May - Cape Town, South Africa
  • Average pressure in May: 1018.1mbar

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 May
Cape Town, South Africa

Average wind speed in May - Cape Town, South Africa
  • Average wind speed in May: 13.4km/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 May
Cape Town, South Africa

Average humidity in May - Cape Town, South Africa
  • Average humidity in May: 73%

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 May
Cape Town, South Africa

Average rainfall in May - Cape Town, South Africa
  • Average rainfall in May: 46mm

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 May
Cape Town, South Africa

Average rainfall days in May - Cape Town, South Africa
  • Average rainfall days in May: 11.1 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 May
Cape Town, South Africa

Average sea temperature in May - Cape Town, South Africa
  • Average sea temperature in May: 16.4°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 May /
Average sunshine in May
Cape Town, South Africa

Average daylight in May / Average sunshine in May - Cape Town, South Africa
  • Average daylight in May: 10.4h

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 May: 6.5h

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 May
Cape Town, South Africa

Average sunshine days in May - Cape Town, South Africa
  • Average sunshine days in May: 18.4 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 May
Cape Town, South Africa

Average UV index in May - Cape Town, South Africa
  • Average UV index in May: 4

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 May
Cape Town, South Africa

Average cloud cover in May - Cape Town, South Africa
  • Average cloud cover in May: 31

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 May
Cape Town, South Africa

Average visibility in May - Cape Town, South Africa
  • Average visibility in May: 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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