Weather in Johannesburg in September
September in Johannesburg is mild with average temperatures around 18.0°C (64.4°F). Light rainfall with only 16mm expected.
Data Note: Temperature values are 2001–2020 satellite/reanalysis grid averages from NASA POWER and may differ from airport station normals by a few degrees.
Temperature
High
26.9°C
80.4°F
Low
9.1°C
48.4°F
Precipitation
16 mm
0.6 inches
~2 rainy days
Conditions
Humidity
39%
Comparison to Adjacent Months
September is 4.0°C warmer than August.
September is 2.3°C cooler than October, 41mm drier than October.