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Weather in Knysna for September 2025

Your guide to Knysna weather in September - trends and predictions

    Temperatures

  • So far, September 2025 in Knysna is slightly warmer than the historical average by 0.6 °C.

  • The forecast for the next days in Knysna predicts temperatures to be around 19 °C, close to the historical average.

  • In general, the average temperature in Knysna at the beginning of September is 19.4 °C. As the month progressed, temperatures tended to moderately fall, reaching an average of 18 °C by the end of September.

    • Rain 🌧️

  • The climate of Knysna in September is notably wet, with an average of 12 rainy days, and a total of 47.1 mm of precipitation.

    • More

  • New! Chat with our AI weatherman - it’s amazing and free.

Average dry days
18
Dry days
Average rainy days
12
Rainy days
Average snowy days
0
Snow days
Average temperatures
18°/11°
Temperatures
Average wind speed
23 km/h
Avg max wind
Average humidity
75 %
Avg humidity

Knysna Weather September

Move between months or click on a day
August
October
Mon.Tue.Wed.Thu.Fri.Sat.Sun.
1
Partly cloudy
19°
2
Overcast
23°
3
Patchy rain possible
19°
4
Patchy rain possible
18°
5
Overcast
19°
6
Sunny
19°
7
Overcast
19°
8
Light rain shower
18°
9
Overcast
19°
10
Sunny
19°
11
Overcast
18°
12
Patchy rain possible
19°
13
Patchy rain possible
18°
14
Sunny
20°
15
Sunny
21°
16
Moderate rain
15°
17
Patchy rain possible
17°
18
Patchy rain possible
16°
19
Patchy rain possible
17°
20
Overcast
23°
21
Partly cloudy
19°
22
Sunny
19°
23
Sunny
25°
24
Patchy rain possible
21°
25
Patchy rain possible
22°
26
Overcast
18°
27
Cloudy
18°
28
Overcast
17°
29
Overcast
15°
30
Light rain shower
15°

Temperatures trend during September in Knysna

See the weather trend as well as the moving average line

September weather in Knysna day by day

Click on a date for more information
August October
Date Weather Temperatures Rain UV More
1 Sept. Partly cloudy
Partly cloudy
 19° /11° 0 mm 6
2 Sept. Overcast
Overcast
 23° /14° 0 mm 6
3 Sept. Patchy rain possible
Patchy rain possible
 19° /12° 0 mm 5
4 Sept. Patchy rain possible
Patchy rain possible
 18° /12° 0 mm 5
5 Sept. Overcast
Overcast
 19° /14° 0 mm 5
6 Sept. Sunny
Sunny
 19° /12° 0.2 mm 6
7 Sept. Overcast
Overcast
 19° /12° 0.3 mm 5
8 Sept. Light rain shower
Light rain shower
 18° /15° 1.3 mm 5
9 Sept. Overcast
Overcast
 19° /11° 0 mm 6
10 Sept. Sunny
Sunny
 19° /11° 0 mm 7
11 Sept. Overcast
Overcast
 18° /8° 0 mm 5
12 Sept. Patchy rain possible
Patchy rain possible
 19° /12° 0.1 mm 1.4
13 Sept. Patchy rain possible
Patchy rain possible
 18° /14° 1.7 mm 0.4
14 Sept. Sunny
Sunny
 20° /14° 0 mm 1.4
15 Sept. Sunny
Sunny
 21° /14° 0 mm 1.8
16 Sept. Moderate rain
Moderate rain
 15° /12° 5.2 mm 4
17 Sept. Patchy rain possible
Patchy rain possible
 17° /11° 0.3 mm 4
18 Sept. Patchy rain possible
Patchy rain possible
 16° /11° 0.3 mm 4
19 Sept. Patchy rain possible
Patchy rain possible
 17° /12° 0.1 mm 4
20 Sept. Overcast
Overcast
 23° /13° 0 mm 5
21 Sept. Partly cloudy
Partly cloudy
 19° /14° 0.1 mm 6
22 Sept. Sunny
Sunny
 19° /13° 0 mm 6
23 Sept. Sunny
Sunny
 25° /16° 0 mm 7
24 Sept. Patchy rain possible
Patchy rain possible
 21° /17° 0.1 mm 5
25 Sept. Patchy rain possible
Patchy rain possible
 22° /16° 0.3 mm 5
26 Sept. Overcast
Overcast
 18° /13° 6 mm 5
27 Sept. Cloudy
Cloudy
 18° /11° 0 mm 5
28 Sept. Overcast
Overcast
 17° /12° 3.2 mm 5
29 Sept. Overcast
Overcast
 15° /10° 3.4 mm 5
30 Sept. Light rain shower
Light rain shower
 15° /9° 9.1 mm 4
Next
Important Notice
Our weather forecast for Knysna in September is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Knysna forecast closer to your planned date for the most up-to-date weather information.
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Knysna in September - FAQ

What are the expected maximum and minimum temperatures in Knysna during September?
Enjoy moderate daytime temperatures of up to 18° and cooler nights around 11°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Knysna during September?
In September, Knysna can expect light to moderate rainfall, totaling 47.1 mm across approximately 12 days. Occasional showers are possible, and planning ahead for them could be helpful.
What are the typical wind conditions in Knysna during September?
The average wind speed in Knysna during September is 23 km/h, suggesting breezy to windy conditions, depending on your activities.

September rainfall patterns in Knysna

Explore the daily rainfall trends and prepare for Knysnas September weather 💧

UV exposure in Knysna during September

Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️

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Location coordinates Where is Knysna?

Get accurate weather forecasts for Knysna, located at latitude -34.036 and longitude 23.047. Stay updated with localized weather information tailored for Knysna.

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