September weather forecast
Knysna, South Africa

September represents a significant change towards warmer weather, following the patterns established by August. Notable is a reduction in rainfall to 44mm (1.73") over 12 days. The blossoming flora during September transforms Knysna into an exquisite paradise, making it a great period for nature walks and picnics. Sea temperatures rise gently in preparation for the upcoming summer, offering a refreshing dip for the more adventurous. All in all, September is a window into the brilliant awakening of life and color across the region.

Temperature

Knysna sees its lowest temperatures during June through September, with an average high-temperature of 21°C (69.8°F).

Rainfall

In Knysna, in September, it is raining for 12 days, with typically 44mm (1.73") of accumulated precipitation. Throughout the year, there are 145 rainfall days, and 719mm (28.31") of precipitation is accumulated.

Sea temperature

In Knysna, South Africa, in September, the average water temperature is 17.1°C (62.8°F).
Note: When the surface water temperature is 17.1°C (62.8°F), most do not enjoy swimming. Breathing control becomes more complex as temperatures drop below 21°C (69.8°F).

Daylight

The average length of the day in September in Knysna is 11h and 53min.
On the first day of the month, sunrise is at 06:45 and sunset at 18:10. On the last day of September, in Knysna, sunrise is at 06:05 and sunset at 18:30 SAST.

Sunshine

In Knysna, the average sunshine in September is 9h.

UV index

The average daily maximum UV index in September is 6. A UV Index value of 6 to 7 symbolizes a high health vulnerability from unsafe exposure to UV radiation for ordinary individuals.
Note: In September, the maximum UV index of 6 suggests this advice:
Escape overexposure. People with light skin may incur burns in fewer than 20 minutes. Stay out of direct sunlight and seek shade between 10 a.m. and 4 p.m., when UV radiation is strongest, but remember that shade devices may not offer full sun protection. For holistic sun protection encompassing the eyes, ears, face, and neck, a wide-brim hat is key.