Knysna weather in September 2025

Expect daytime maximum temperatures of 64°F in Knysna, South Africa in September based on long-term weather averages. There are 7 hours of sunshine per day on average with 11 days with some rainfall and typically 3.0 inches of rainfall in the month.

  • 64°F maximum daytime temperature in September in Knysna64
    64°F max day temperature
  • 7 hours of sunshine per day
  • 11 days with some rainfall in September in Knysna11
    11 days with some rainfall
  • 50°F minimum night-time temperature in September in Knysna50
    50°F min night temperature
  • 12 hours of daylight per day in September in Knysna12
    12 hours of daylight per day
  • No heat & humidity in September in Knysna0
    No heat & humidity
  • 3.0 inches monthly rainfall in September in Knysna3.0
    3.0 inches of monthly rainfall
  • UV (maximum) index 6 (High) in September in Knysna6
    6 (High) UV index
  • 63°F sea temperature in September in Knysna63
    63°F sea temperature

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The September weather guide for South Africa (Knysna) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

Metric (°C)  |  Imperial (°F)

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More about South Africa

How hot is it in Knysna in September?

Daytime temperatures usually reach 64°F in Knysna in September, falling to 50°F at night.

How sunny is it in Knysna in September?

There are normally 7 hours of bright sunshine each day in Knysna in September - that's 59% of daylight hours.

How warm is the sea around Knysna in September?

The average sea temperature around Knysna in September is 63°F.

Does it rain in Knysna in September?

There are usually 11 days with some rain in Knysna in September and the average monthly rainfall is 3.0 inches.

Knysna September sunrise & sunset times

Browse the sunrise and sunset times for Knysna in September 2025. Select a month to view Knysna sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 06:46 18:10
Monday, 15th September 2025 06:27 18:19
Tuesday, 30th September 2025 06:06 18:30

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