Cape Town Weather in May
South Africa · Mediterranean climate · Data averaged from 2020-01-01 to 2024-12-31 (5 years)
May in Cape Town sees average temperatures ranging from a low of 11.9°C (53.4°F) to a high of 19.2°C (66.6°F), with a mean of 15.2°C (59.4°F). Compared to the annual average of 16.8°C (62.2°F), this month is 1.6°C cooler than the yearly norm. Precipitation averages 77.2mm, making it approximately 18.0mm wetter than the monthly average of 60.0mm. The city receives an average of 8.6 hours of sunshine per day during May, with relative humidity averaging 80.6%. Wind speeds reach an average maximum of 18.4 km/h. For travelers, this month offers a temperature experience in Cape Town, with wetter-than-average conditions compared to the rest of the year.
Cape Town's climate data reveals a fascinating pattern: it's one of the few Southern Hemisphere cities with a true Mediterranean climate. I was there in January (their summer) expecting tropical heat — instead got dry, windy, 26°C days perfect for wine country visits. The data shows December-February as ideal, but watch for the 'Cape Doctor' — a strong southeast wind that can disrupt plans. Winter (June-August) is wet and cool, but the whale watching peaks in July.
May vs Adjacent Months
| Metric | April | May | June |
|---|---|---|---|
| Mean Temp | 17.3°C (63.1°F) | 15.2°C (59.4°F) | 14.4°C (57.9°F) |
| Rainfall | 34.7mm | 77.2mm | 144.0mm |
| Sunshine | 9.7 hrs | 8.6 hrs | 7.7 hrs |
| Humidity | 74.9% | 80.6% | 78.8% |
| Wind | 21.7 km/h | 18.4 km/h | 21.4 km/h |
| Rainy Days | 7.4 | 11.2 | 13.8 |
Seasonal Context
May falls in Spring in the Northern Hemisphere. Spring is a transitional season with temperatures rising from winter lows. For travelers visiting Cape Town in May, the data indicates favorable conditions based on the combination of temperature, precipitation, and daylight hours.
Frequently Asked Questions
What is the average temperature in Cape Town in May?
The average temperature in Cape Town during May ranges from 11.9°C (53.4°F) to 19.2°C (66.6°F), with a mean of 15.2°C (59.4°F).
How much does it rain in Cape Town in May?
Cape Town receives an average of 77.2mm of precipitation in May, spread across approximately 11.2 rainy days.
What should I pack for Cape Town in May?
Based on May weather data, pack layers including light jackets and t-shirts, plus an umbrella.
Is May a good time to visit Cape Town?
May is a good time to visit Cape Town, with comfortable temperatures and manageable rainfall.
Other Months for Cape Town
Cities with Similar May Climate (Mediterranean)
Data Source: Open-Meteo historical archive (2020-01-01 to 2024-12-31). Daily measurements aggregated into monthly climate normals. Coordinates: -33.92°, 18.42°. Timezone: Africa/Johannesburg. Last updated: 2026-07-30.