Weather in Onitsha in September
September in Onitsha is warm with average temperatures around 25.4°C (77.7°F). Expect significant rainfall with 315mm across approximately 29 days.
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
28.1°C
82.6°F
Low
22.6°C
72.7°F
Precipitation
315 mm
12.4 inches
~29 rainy days
Conditions
Humidity
90%
Comparison to Adjacent Months
September is 73mm wetter than August.
September is 105mm wetter than October.