August weather forecast
Johannesburg, South Africa

August in Johannesburg signals the end of the winter season and the onset of spring. The return of slightly milder weather begins with a gradual increase in temperatures. With an insignificant increase in rainfall to 6mm (0.24"), the weather continues to stay predominantly dry and clear. Augmenting daylight hours hint at the incoming spring season, promising longer, sunny days ahead. Despite the increased UV index, the conditions remain perfect to enjoy the natural beauty of Johannesburg's blooming spring season.

Temperature

Johannesburg experiences an average high-temperature of a still refreshing 19.4°C (66.9°F) in August, marking an insignificant shift from 16.7°C (62.1°F) in July. In August, a remarkable difference from daytime highs is noted, as Johannesburg records an average temperature of 6.2°C (43.2°F) during the night.

Humidity

The least humid month in Johannesburg is August, with an average relative humidity of 46%.

Rainfall

In Johannesburg, in August, it is raining for 2.1 days, with typically 6mm (0.24") of accumulated precipitation. In Johannesburg, during the entire year, the rain falls for 99.3 days and collects up to 713mm (28.07") of precipitation.

Daylight

In August, the average length of the day in Johannesburg is 11h and 13min.
On the first day of the month, sunrise is at 06:46 and sunset at 17:41. On the last day of August, in Johannesburg, sunrise is at 06:20 and sunset at 17:55 SAST.

Sunshine

In Johannesburg, the average sunshine in August is 9.2h.

UV index

In August, the average daily maximum UV index is 7. A UV Index value of 6 to 7 symbolizes a high health risk from exposure to the Sun's UV radiation for the average person.
Note: The daily high UV index of 7 in August translates into this advice:
Conform to measures and uphold sun safety traditions. Warding off skin and eye harm is necessary. The Sun's UV radiation is most intense from 10 a.m. to 4 p.m. Try to avoid direct sun exposure during these hours. Stay sun-safe with clothing that is both closely woven and worn loosely.