September · Canada
Best time to visit Niagara-on-the-Lake in September Weather, crowds & prices
Weather in Niagara-on-the-Lake in September
Average temperature 20°C, 35 mm of rain, about 14 days with 6+ hours of sunshine and 72% humidity — based on the five most recent complete years of ERA5 data (2021–2025).
September score
9.0/10
Ranked #4 of 12 months
- Avg temp
- 20°C
- Rainfall
- 35 mm
- Humidity
- 72%
- Days with 6h+ sun
- 14
- Crowd Density
- Moderate Crowds
- Average Expenses
- $$$ · Peak Season Rates ($$$)
September in Niagara-on-the-Lake scores 9.0/10 for sightseeing and cultural travel - an above-average month (#4 of 12). Expect around 20°C, 35 mm of rain, and roughly 14 days with 6+ hours of sunshine this month.
Niagara-on-the-Lake's colonial main street and vineyards sit where the Niagara river meets Lake Ontario.
September ranks 4th of 12 for Niagara-on-the-Lake — one of the best windows
At 20°C (67°F) this is comfortable city weather in September, with sightseeing easiest before lunch and after the afternoon peak.
With around 35 mm of rain, any showers tend to pass through rather than settle in; about 14 days with 6+ hours of sunshine and 12.3 hours of daylight fill the rest.
On our climate-comfort scale this is one of the strongest months of the year for Niagara-on-the-Lake at 9/10 (4th of 12), just behind May at 9.1/10.
Pack light clothing, a hat and real sun protection.
Expect peak pricing, and crowds are moderate.
Frequently asked
- What is the weather like in Niagara-on-the-Lake in September?
- In September, Niagara-on-the-Lake averages 20°C, 35 mm of rain, and about 14 days with 6+ hours of sunshine. Its climate-comfort score is 9.0/10.
- Is September a good time to visit Niagara-on-the-Lake?
- September earns a 9.0/10 climate-comfort score. Use the year-round chart to weigh the weather against your budget and crowd preferences.
- How much does it rain in Niagara-on-the-Lake in September?
- Expect about 35 mm of rain in September. Average humidity is 72% and there are about 14 days with 6+ hours of sunshine.
Curated in Niagara-on-the-Lake
Tickets & experiences
Things to do in Niagara-on-the-Lake
Niagara-on-the-Lake, Canada. Live activities and tours from GetYourGuide, matched to this destination.