Johannesburg weather in September
Temperature, rain and sunshine in September: long-term averages from 30 years of weather data, not a forecast.
Holiday weather in September
Excellent
Best time to visit: April – October
What is the weather like in Johannesburg in September?
In September, Johannesburg is warm: daytime highs average 24 °C, and nights cool down to about 9 °C. The sun shines for around 8 hours a day. Rain is rare: about 4 days bring 22 mm in total. All in all, September is an excellent month for a holiday in Johannesburg.
September compared
How the weather changes from August to October. Tap a month to open it.
| AugustAug | SeptemberSep | OctoberOct | |
|---|---|---|---|
| Score | 95 | 96 | 81 |
| Day | 20° | 24° | 25° |
| Night | 5° | 9° | 11° |
| Sun | 8 h | 8 h | 7 h |
| Rain days | 2 | 4 | 10 |
More details for September
- Daylight
- 11 h 54 min06:06 – 18:00
- UV index
- 10 · very highclear sky, noon (estimate)All months
- Muggy days
- 0 daysdew point 18 °C or moreAll months
- Wind
- 20 km/haverage daily peakAll months
- Cloud cover
- 23 %on averageAll months
- Hot days
- 0 days30 °C or moreAll months
- Time zone
- UTC+2Africa/Johannesburg
How the score comes together
- Temperatureweight 50 %100 %
- Sunshineweight 20 %80 %
- Few rainy daysweight 30 %100 %
Each factor is rated from 0 to 100 % and weighted for the travel style “City break”.
What to pack in September
- Sunscreen
- Sunglasses & sun hat
- A jumper for the evenings
Johannesburg in September: quick answers
Is Johannesburg hot in September?
Warm rather than hot: in September, daytime highs in Johannesburg average 24 °C and nights cool to about 9 °C.
Does it rain much in Johannesburg in September?
Rain is rare: about 4 days bring 22 mm in total.
Johannesburg month by month
The whole year in JohannesburgAll destinations: South AfricaWhere to go in September
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, WMO 1991–2020 (NOAA NCEI), GeoNames (CC BY 4.0). Sources & licences