Weather in Lisbon in September
September in Lisbon is mild with average temperatures around 20.3°C (68.5°F). Light rainfall with only 25mm 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
22.6°C
72.7°F
Low
18.0°C
64.4°F
Precipitation
25 mm
1.0 inches
~5 rainy days
Conditions
Humidity
81%
Comparison to Adjacent Months
September is 54mm drier than October.