Niagara-on-the-Lake Weather in September
Average highs run from 24°C on September 1 to 18°C on September 30, and lows from 18°C to 12°C. Normal precipitation for the month is 63 mm over about 12 wet days.
September day by day
The normal high and low for each date, and the record, in °C.
- Normal low
- Normal high
- Record high
- Record low
September at a glance
- Average high
- 22°C
- Average low
- 15°C
- Precipitation
- 63 mm
- Record high
- 33°CSep 7, 2016
- Record low
- 6°CSep 29, 2000
- Daylight
- 13 h 10 min to 11 h 46 min
- Cloud cover
- 65%
- Humidity
- 76%
- Dew point
- 13°C
- Wind
- 18.4 km/h
Every day of the month
A wet day has at least 1 mm of precipitation in the reanalysis.
| Date | Normal high | Normal low | Record high | Record low | Chance wet |
|---|---|---|---|---|---|
| Sep 1 | 24°C | 18°C | 31°C 2010 | 13°C 2017 | 39% |
| Sep 2 | 24°C | 18°C | 30°C 2010 | 11°C 2017 | 40% |
| Sep 3 | 25°C | 18°C | 30°C 2022 | 14°C 2006 | 41% |
| Sep 4 | 24°C | 18°C | 30°C 2023 | 14°C 1997 | 42% |
| Sep 5 | 23°C | 17°C | 32°C 2018 | 12°C 2000 | 41% |
| Sep 6 | 24°C | 17°C | 32°C 2007 | 10°C 2000 | 42% |
| Sep 7 | 24°C | 17°C | 33°C 2016 | 14°C 2017 | 44% |
| Sep 8 | 22°C | 17°C | 30°C 2001 | 13°C 1995 | 44% |
| Sep 9 | 22°C | 16°C | 32°C 2001 | 12°C 2025 | 44% |
| Sep 10 | 23°C | 16°C | 32°C 2002 | 10°C 1995 | 44% |
| Sep 11 | 23°C | 15°C | 30°C 2013 | 11°C 1995 | 42% |
| Sep 12 | 23°C | 16°C | 31°C 2005 | 11°C 2014 | 42% |
| Sep 13 | 23°C | 16°C | 30°C 2005 | 11°C 2014 | 42% |
| Sep 14 | 23°C | 16°C | 30°C 1993 | 11°C 2013 | 42% |
| Sep 15 | 22°C | 15°C | 27°C 1998 | 11°C 2020 | 42% |
| Sep 16 | 21°C | 14°C | 28°C 2015 | 9°C 2013 | 41% |
| Sep 17 | 22°C | 15°C | 28°C 2015 | 9°C 2013 | 40% |
| Sep 18 | 22°C | 15°C | 28°C 2025 | 11°C 2013 | 39% |
| Sep 19 | 21°C | 15°C | 29°C 2002 | 8°C 2014 | 38% |
| Sep 20 | 22°C | 15°C | 30°C 2002 | 10°C 2020 | 40% |
| Sep 21 | 22°C | 14°C | 31°C 2018 | 10°C 2020 | 41% |
| Sep 22 | 21°C | 14°C | 29°C 2019 | 10°C 1993 | 42% |
| Sep 23 | 21°C | 14°C | 32°C 2017 | 8°C 1995 | 42% |
| Sep 24 | 21°C | 13°C | 29°C 2010 | 9°C 1993 | 42% |
| Sep 25 | 20°C | 14°C | 30°C 2007 | 8°C 2001 | 43% |
| Sep 26 | 21°C | 13°C | 29°C 1998 | 6°C 2001 | 46% |
| Sep 27 | 21°C | 14°C | 29°C 2017 | 9°C 2001 | 48% |
| Sep 28 | 19°C | 13°C | 27°C 2020 | 6°C 2000 | 49% |
| Sep 29 | 19°C | 12°C | 24°C 1998 | 6°C 2000 | 50% |
| Sep 30 | 18°C | 12°C | 25°C 2002 | 6°C 1993 | 49% |
Chance of rain
- Chance of a wet day
Sunrise and sunset
Times for 2026, local time (EDT).
- September 1
- sunrise 6:41 AM, sunset 7:51 PM
- September 30
- sunrise 7:13 AM, sunset 6:59 PM
Other months
Sources
Records: NOAA GHCN-Daily, station CA006136699, every year on file, quality-flagged values removed. Cloud, humidity, wind and sunshine: NASA POWER (MERRA-2, CERES and GEWEX SRB), 1991-2020. The data was obtained from the National Aeronautics and Space Administration (NASA) Langley Research Center's Prediction Of Worldwide Energy Resources (POWER) project funded through the NASA Earth Science Division: POWER Daily API v2, accessed 2026-09-25. Sun and moon: computed with the NOAA solar equations and Meeus.