Cape Town
South Africa
Long-term weather forecast
Long-term weather forecast

May weather forecast and climate
Cape Town, South Africa

May, the last month of the autumn, in Cape Town, is also an enjoyable month, with average temperature ranging between max 19.7°C (67.5°F) and min 13.1°C (55.6°F).

Temperature

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

Humidity

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

Rainfall

In Cape Town, in May, during 11.1 rainfall days, 46mm (1.81") of precipitation is typically accumulated. Throughout the year, there are 111 rainfall days, and 435mm (17.13") of precipitation is accumulated.

Sea temperature

In May, the average sea 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

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

Sunshine

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

UV index

May through September, with an average maximum UV index of 4, are months with the lowest UV index in Cape Town. A UV Index of 3 to 5 symbolizes a moderate threat to health from the exposure to the Sun's UV radiation for the average person.
Note: In May, the average maximum UV index of 4 translate into the following recommendations:
Take precautions - Protection against the skin and eye damage is obliged. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. 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.

What is the temperature in May in Cape Town?

In May, in Cape Town, the average high-temperature is 19.7°C (67.5°F), and the average low-temperature is 13.1°C (55.6°F).

What is the average humidity in May in Cape Town?

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

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

In May, in Cape Town, the rain falls for 11.1 days. Throughout May, 46mm (1.81") of precipitation is accumulated.

What is the sea temperature in May in Cape Town?

In May, the average sea temperature is 16.4°C (61.5°F). For swimming, a surface water temperature of 16.4°C (61.5°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).

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

The average length of the day in May is 10.4h.

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

The average sunshine in May in Cape Town, South Africa, is 6.5h.

When is the lowest UV index in Cape Town?

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

What is the UV index reading in May in Cape Town?

In May, the average daily maximum UV index is 4. A UV Index value of 3 to 5 symbolizes a moderate health threat from the exposure to the Sun's UV radiation.
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).

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%).

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).

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).

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).

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).

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).