Stellenbosch Weather in September
Stellenbosch in September sees pleasant daytime temperatures of 19°C (66°F) and nighttime lows of 9°C (48°F). Rainfall is fairly high this month at around 74 mm (2.9 in), so pack a rain jacket to stay dry.
Rainfall in Stellenbosch in September
On average, there are about 11 days with rain during this month, averaging 74 mm (2.9 in). Rainfall intensity is on the higher side this month. Expect more substantial showers rather than light, passing rain.
Temperature in Stellenbosch in September
September in Stellenbosch brings pleasant temperatures, with highs of 19°C (66°F) and nights around 9°C (48°F). Temperatures can feel cooler in the morning and evening, so layering is often the best approach. Nights drop to 9°C (48°F). Cold nights like these are actually great for sleeping well, as long as you have a warm enough duvet.
Sunshine in Stellenbosch in September
Expect a lot of sunshine this month, with about 225 hours of sun. These sunny conditions add to the overall experience.
Wind Speed in Stellenbosch in September
Average wind conditions reach 5 m/s (10 knots) in September. This creates lively weather with fresh winds that make small trees sway noticeably. Remember this is an average: some days are less windy while others have particularly active windy conditions.
Average water temperature in September
At 15°C (59°F), the water is cool but manageable for those who don't mind a bit of a shock getting in. Most people adjust after a few minutes.If you prefer enjoying temperate temperatures and rain-free days, January, February, March, April, May, October, November and December typically offer the best circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit South Africa, check out our Stellenbosch's climate page.
Stellenbosch Temperature in September
Min Temperature
9°C (48°F)
Max Temperature
19°C (66°F)
Water Temperature
15°C (59°F) *
Chance of Rain
35%
Precipitation
74 mm (2.9 in)
Rainy days
11 days
Humidity
77% *
Windspeed
5 m/s (10 knots) *
Sunshine
225 hours *
Percentage Sunshine
*
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Stellenbosch typically stay consistent throughout September, with daily highs averaging around 19°C (66°F). Nights are cool, with lows around 10°C (50°F).
Average temperatures in September
Daily Historical Precipitation
50-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in September
Historical weather for Stellenbosch in September
Browse day-by-day weather records for Stellenbosch spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Stellenbosch historical weather extremes in September
Based on 49 years of weather observations in Stellenbosch between 1976 and 2025, these are the recorded extremes.
- Stellenbosch recorded its highest September temperature of 33°C (91°F) on September 12, 1997.
- The coldest September day was on September 20, 2013, with a maximum of 12°C (54°F).
- The coldest night in September in Stellenbosch was on September 1, 1990, with a minimum of 2°C (36°F).
- The wettest September day on record brought 44 mm (1.7 in) of precipitation to Stellenbosch (September 25, 2023).
Best Places in South Africa in September
Find out more about the weather in South Africa and which places have the best travel conditions in this month. See all of South Africa in September →
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What to Wear in Stellenbosch in September
For Stellenbosch in September, you'll want flexible clothing. It's wise to pack cotton shirts, comfortable shorts, and a pair of jeans for cooler evenings. A light sweater or jacket is useful for air-conditioned spaces (like buses) or unexpected cool moments. Rain is likely on several days, so bring a good rain jacket. Expect water temperatures of around 15°C (59°F), which is definitely too cold for comfortable swimming. Your luggage space is better used for other items. Don't forget sun protection, sunglasses, sunscreen, and a hat. These are all good ideas with this much sunshine.What To Do in Stellenbosch in September
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit South Africa, check out our Stellenbosch's climate page.
Temperature Rainfall Sunshine Humidity Wind Speed Water Temp
See the full Stellenbosch climate overview or explore weather in South Africa.
