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

May weather forecast and Climate
Cape Town, South Africa

  • Average high temperature in May: 20.3°C

Warmest month (with highest average high temperature) is February (26.5°C).
Month with lowest average high temperature is July (17.5°C).

  • Average low temperature in May: 9.4°C

Month with highest average low temperature is January (15.7°C).
Coldest month (with lowest average low temperature) is July (7°C).

  • Average humidity in May: 81%

Months with highest relative humidity are May, June and July (81%).
Months with lowest relative humidity are January, November and December (71%).

  • Average rainfall in May: 69mm

Wettest month (with highest rainfall) is June (93mm).
Driest month (with lowest rainfall) is November (14mm).

  • Average rainfall days in May: 11.4 days

Month with highest number of rainy days is August (13.7 days).
Month with lowest number of rainy days is February (4.6 days).

  • Average sea temperature in May: 17°C

Best months for swimming (with highest average sea temperature) are January and February (19°C).
Coldest months (with lowest average sea temperature) are July, August and September (15°C).

  • Average daylight in May: 10h

Months with longest days are January, November and December (Average daylight: 14h).
Months with shortest days are May, June and July (Average daylight: 10h).

  • Average sunshine in May: 6.6h

Month with most sunshine is January (Average sunshine: 10.9h).
Month with least sunshine is June (Average sunshine: 5.8h).

  • Average UV index in May: 4

Months with highest UV index are January and December (UV index 12).
Months with lowest UV index are June and July (UV index 3).