- September 16 - High dewpoint 21.2°C. Old record 19.6°C in 2018. Also briefly latest date to reach 21.0°C dewpoint.
- September 17 - High dewpoint 21.2°C. Old record 17.8°C in 1955. Also latest date to reach 21.0°C dewpoint.
- September 17 - High minimum dewpoint 18.4°C. Old record 11.2°C in 2002. Tied 2nd highest in September and latest 16.0°C+.
- September 17 - High humidex 36.8. Old record 34.5 in 1976.
- September 17 - High minimum temperature 21.3°C. Old record 17.8°C in 1946. Also 3rd highest in September and latest date to see a minimum temperature of 20.0°C or higher (old record 20.0°C on Sep 15, 1908).
- September 18 - High dewpoint 20.0°C. Old record 17.8°C in 1961. Also 3rd latest date to reach 20.0°C dewpoint.
- September 20 - High minimum temperature 15.6°C. Old record 15.0°C in 1958 and 2009.
- September 20 - High minmum dewpoint 13.2°C. Old record 11.1°C in 1959.
- September 21 - High dewpoint 17.5°C. Old record 17.2°C in 1969.
- September 21 - High minimum dewpoint 12.0°C. Old record 11.7°C in 1969.
- September 29 - High rainfall 12.9 mm. Old record 12.0 mm in 1991.