| < September >
|Normal Max/ High Temperature
|Min/ Low Temperature
|Average Daylight per day
|Sun altitude at solar noon on the 21st day.
- The average temperature in London, On in September is very mild at 15.3 °C (59.54 °F).
- Afternoons can be warm with average high temperatures reaching 20.9 °C (69.6 °F).
- Overnight temperatures are generally a little cool with an average low of 9.6 °C (49.3 °F).
- The average diurnal temperature range/ variation in September is 11.3 °C (20.3 °F).
- The weather in September is dryish. Just 86.2mm (3.4in) of fluid tumbles.
- The shortest day is 11:43 long and the longest day is 13:09 long with an average length of 12:26.
Check the distance to and compare the London, On September averages with somewhere beginning with:
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Weather Trend Graph for September in London, On, Canada
Navigate to September Weather in Locations Surrounding London, On:
- Toronto Downsview, On, Canada - 156.8 kms (97.4 miles) ENE
- Toronto, Pearson Intl, On, Canada - 142.3 kms (88.4 miles) ENE
- Toronto, Ontario, Canada - 156.7 kms (97.4 miles) ENE
- Waterloo Wellington, On, Canada - 78.6 kms (48.8 miles) NE
- St Catharines, On, Canada - 161.9 kms (100.6 miles) E
- Hamilton, On, Canada - 100 kms (62.1 miles) E
- Erie, Pa, Usa - 132 kms (82.1 miles) SE