Cape Town
September
Weather in Cape Town for September 2025
Your guide to Cape Town weather in September - trends and predictions
In general, the average temperature in Cape Town at the beginning of September is 16.7 °C. As the month progressed, temperatures tended to moderately rise, reaching an average of 18.3 °C by the end of September.
The climate of Cape Town in September is notably wet, with an average of 15 rainy days.
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15
Dry days
15
Rainy days
0
Snow days
16°/10°
Temperatures
24 km/h
Avg max wind
70 %
Avg humidity
Cape Town in September average weather
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| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  16° | 2 21° | 3 18° | 4 16° | 5 14° | 6  15° | 7  17° |
| 8  17° | 9  19° | 10 17° | 11  17° | 12  17° | 13 19° | 14 17° |
| 15 16° | 16 15° | 17 16° | 18 16° | 19 15° | 20 18° | 21  18° |
| 22 21° | 23 21° | 24 18° | 25 17° | 26 19° | 27 20° | 28 21° |
| 29 18° | 30 15° |
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Temperatures trend during September in Cape Town
See the weather trend as well as the moving average line
September weather day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. | Patchy rain possible | 16° /9° | 0.1 mm | 4 | |
| 2 Sept. | Light rain shower | 21° /10° | 4.3 mm | 6 | |
| 3 Sept. | Patchy rain possible | 18° /10° | 1.8 mm | 5 | |
| 4 Sept. | Light rain shower | 16° /9° | 2.7 mm | 4 | |
| 5 Sept. | Light rain shower | 14° /8° | 12.3 mm | 4 | |
| 6 Sept. | Overcast | 15° /8° | 0 mm | 4 | |
| 7 Sept. | Sunny | 17° /8° | 0 mm | 6 | |
| 8 Sept. | Mist | 17° /10° | 0.2 mm | 4 | |
| 9 Sept. | Partly cloudy | 19° /9° | 0.2 mm | 6 | |
| 10 Sept. | Light rain shower | 17° /8° | 11.1 mm | 5 | |
| 11 Sept. | Moderate or heavy rain shower | 17° /7° | 9.4 mm | 5 | |
| 12 Sept. | Cloudy | 17° /8° | 0 mm | 5 | |
| 13 Sept. | Sunny | 19° /8° | 0 mm | 6 | |
| 14 Sept. | Overcast | 17° /10° | 0 mm | 5 | |
| 15 Sept. | Overcast | 16° /10° | 0.1 mm | 4 | |
| 16 Sept. | Patchy rain possible | 15° /10° | 0.8 mm | 5 | |
| 17 Sept. | Partly cloudy | 16° /9° | 0 mm | 6 | |
| 18 Sept. | Partly cloudy | 16° /9° | 1.4 mm | 5 | |
| 19 Sept. | Patchy rain possible | 15° /10° | 1.3 mm | 4 | |
| 20 Sept. | Patchy rain possible | 18° /10° | 0.1 mm | 5 | |
| 21 Sept. | Light drizzle | 18° /9° | 1.9 mm | 6 | |
| 22 Sept. | Patchy rain possible | 21° /10° | 0.1 mm | 6 | |
| 23 Sept. | Patchy rain possible | 21° /12° | 0.2 mm | 6 | |
| 24 Sept. | Light rain shower | 18° /12° | 22 mm | 5 | |
| 25 Sept. | Light rain shower | 17° /12° | 25.7 mm | 4 | |
| 26 Sept. | Patchy rain possible | 19° /11° | 0.3 mm | 5 | |
| 27 Sept. | Sunny | 20° /11° | 0 mm | 6 | |
| 28 Sept. | Sunny | 21° /11° | 4.4 mm | 6 | |
| 29 Sept. | Overcast | 18° /11° | 3.3 mm | 5 | |
| 30 Sept. | Light rain shower | 15° /10° | 8.9 mm | 4 | |
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Important Notice
Our weather forecast for Cape Town 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 Cape Town forecast closer to your planned date for the most up-to-date weather information.
Cape Town in September - FAQ
What are the expected maximum and minimum temperatures in Cape Town during September?
Enjoy moderate daytime temperatures of up to 16° and cooler nights around 10°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Cape Town during September?
Significant rainfall exceeding 195.1 mm is expected in Cape Town during September, occurring over more than 15 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Cape Town during September?
The average wind speed in Cape Town during September is 24 km/h, suggesting breezy to windy conditions, depending on your activities.
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