Weather in Porto Alegre in September
September in Porto Alegre is mild with average temperatures around 17.0°C (62.6°F). Expect significant rainfall with 157mm across approximately 12 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
21.9°C
71.4°F
Low
12.1°C
53.8°F
Precipitation
157 mm
6.2 inches
~12 rainy days
Conditions
Humidity
84%
Comparison to Adjacent Months
September is 41mm wetter than August.
September is 2.3°C cooler than October.