Johannesburg Weather in September
During September, Johannesburg experiences high daytime temperatures of 26°C (79°F) and cooler nights around 11°C (52°F). Some rainfall is typical during this period.
Rainfall in Johannesburg in September
You can expect rain on around 3 days based on historical patterns, with 24 mm (0.9 in) average for the month. Rainfall tends to arrive in short, intense showers this month. Rain days are few, but the showers can be surprisingly heavy.
Temperature in Johannesburg in September
Weather in Johannesburg is at its perfect in September. Highs reach 26°C (79°F), while nights settle around 11°C (52°F). This gives the month a fairly typical daily rhythm, with warmer afternoons and more comfortable nights. Nights cool down to 11°C (52°F), so a light jacket or extra layer is useful once the sun goes down. On the plus side, the cooler nights make for comfortable sleeping conditions.
Sunshine in Johannesburg in September
Expect sunny days throughout the month, with an estimated 281 hours of sunshine. This makes it a pleasant time to visit Johannesburg.Our weather planner can help you find worldwide destinations with pleasant weather during this period. March, April, May, June, July, August, September and October typically offer the best weather for Johannesburg.
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 Johannesburg's climate page.
Johannesburg Temperature in September
Min Temperature
11°C (52°F)
Max Temperature
26°C (79°F)
Chance of Rain
11%
Precipitation
24 mm (0.9 in)
Rainy days
3 days
Humidity
47%
Sunshine
281 hours
Percentage Sunshine
80%
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Johannesburg typically stay consistent throughout September, with daily highs averaging around 26°C (79°F). Nights are cool, with lows typically ranging from 8°C (46°F) to 12°C (54°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 Johannesburg in September
Browse day-by-day weather records for Johannesburg spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Johannesburg historical weather extremes in September
According to our 49 years of weather records for Johannesburg, the following extremes were recorded between 1976 and 2025.
- On September 29, 1997, temperatures climbed to 34°C (93°F), marking the warmest September day on record.
- Johannesburg registered its coldest September night on September 7, 2004, with temperatures dropping to -1°C (30°F).
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 →
perfect weather
pleasant
tolerable
unpleasant
poor
What to Wear in Johannesburg in September
Warm temperatures in September make for comfortable sightseeing weather. Pack breathable fabrics like cotton shirts, knee-length shorts or skirts, and comfortable walking shoes. A thin long sleeve for indoor spaces is handy. Pack a light rain jacket or compact umbrella for occasional showers. And with plenty of sunshine hours, don’t forget sunglasses, sunscreen, and maybe a sun hat.What To Do in Johannesburg 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 Johannesburg's climate page.
Temperature Rainfall Sunshine Humidity
See the full Johannesburg climate overview or explore weather in South Africa.
