Niagara-on-the-Lake weather in September
Temperature, rain and sunshine in September: long-term averages from 30 years of weather data, not a forecast.
Holiday weather in September
Good
Best time to visit: June – September
What is the weather like in Niagara-on-the-Lake in September?
In September, Niagara-on-the-Lake is warm: daytime highs average 21 °C, and nights cool down to about 17 °C. Expect around 6 hours of sunshine a day. Rain is frequent, with about 10 rainy days and 86 mm in total. All in all, September is a good month for a holiday in Niagara-on-the-Lake.
September compared
How the weather changes from August to October. Tap a month to open it.
| AugustAug | SeptemberSep | OctoberOct | |
|---|---|---|---|
| Score | 82 | 79 | 51 |
| Day | 25° | 21° | 15° |
| Night | 20° | 17° | 11° |
| Sun | 8 h | 6 h | 4 h |
| Rain days | 10 | 10 | 13 |
More details for September
- Daylight
- 12 h 34 min06:54 – 19:29
- UV index
- 6 · highclear sky, noon (estimate)All months
- Muggy days
- 5 daysdew point 18 °C or moreAll months
- Wind
- 22 km/haverage daily peakAll months
- Cloud cover
- 52 %on averageAll months
- Hot days
- 0 days30 °C or moreAll months
- Snow days
- 0 days1 cm or more of fresh snowAll months
- Time zone
- UTC−4America/Toronto
How the score comes together
- Temperatureweight 50 %100 %
- Sunshineweight 20 %57 %
- Few rainy daysweight 30 %59 %
Each factor is rated from 0 to 100 % and weighted for the travel style “City break”.
What to pack in September
- Sunscreen
- Rain jacket or umbrella
Niagara-on-the-Lake in September: quick answers
Is Niagara-on-the-Lake hot in September?
Warm rather than hot: in September, daytime highs in Niagara-on-the-Lake average 21 °C and nights cool to about 17 °C.
Does it rain much in Niagara-on-the-Lake in September?
Rain is frequent, with about 10 rainy days and 86 mm in total.
Niagara-on-the-Lake month by month
The whole year in Niagara-on-the-LakeAll destinations: CanadaWhere to go in September
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, WMO 1991–2020 (NOAA NCEI), GeoNames (CC BY 4.0). Sources & licences