Canada Niagara Falls Weather in September — Climate Guide
September in Niagara Falls is high
Niagara Falls Weather in September — Quick Answer
As of 2026- Avg temp
- 22° / 13°
- Rainfall
- 85mm · 11 days
- Crowds
- Busy
As of 2026, Niagara Falls in September averages a high of 22°C and low of 13°C with 85mm of rain over about 11 days. Mild early autumn — around 22°C/13°C, warm days and cooler evenings. Light layers, a jacket for evenings, and a waterproof shell for the boat and mist. Comfortable walking shoes.
September is high for Niagara Falls.
September at Niagara Falls is one of the best months — mild, pleasant, and easing off the summer peak, around 22°C/13°C.
After the Labour Day long weekend (early September), the crowds thin and prices soften from the summer highs, while the weather stays comfortable — warm days, cooler evenings. The boat is still running, so you get the full close-up experience with fewer people in line.
Travel score
Niagara Falls September Weather Stats
Avg High
22°C
Avg Low
13°C
Rainy Days
11
85mm total
Sunshine
7h
Daily avg
Humidity
72%
comfortable
UV Index
5
Moderate
Wind
12 km/h
Gusts 24
Crowds
Busy
At attractions
September Sunrise & Sunset
Air Quality
PM2.5
15 μg/m³
PM10
28 μg/m³
Status
good
Feels-Like Temperature & Wind
Feels like
Daytime
22°C
Nighttime
13°C
Humidity and wind affect how the actual temperature feels.
Wind
12 km/h
Max gust 24 km/h
Activities Recommended for September
September Travel Pros & Cons
Pros
- Mild, comfortable weather
- Crowds and prices easing after Labour Day
- Boat still running
- Grape harvest in wine country
Cons
- Labour Day weekend still busy
- Cooler evenings
- Occasional rain
- Days shortening
September Events & Festivals
- Labour Day long weekend (first Monday of September)
- Grape harvest season begins in Niagara wine country
- Boat cruise still running
- Niagara Falls illuminated nightly + some fireworks
Niagara Falls in September — Full Picture
September at Niagara Falls is one of the best months — mild, pleasant, and easing off the summer peak, around 22°C/13°C.
After the Labour Day long weekend (early September), the crowds thin and prices soften from the summer highs, while the weather stays comfortable — warm days, cooler evenings. The boat is still running, so you get the full close-up experience with fewer people in line.
This is the start of grape-harvest season in Niagara-on-the-Lake, which makes the wineries especially worth visiting, and the Shaw Festival continues. The Niagara Parkway begins to show early fall colour.
September balances good weather, the boat still operating, and a calmer, cheaper feel than July-August — a strong choice for a visit. Bring a jacket for cooler evenings and a waterproof shell for the boat and mist. Occasional rain is the main caveat, and the boat season starts winding toward its November close.
What to Wear & What to Pack
Mild early autumn — around 22°C/13°C, warm days and cooler evenings. Light layers, a jacket for evenings, and a waterproof shell for the boat and mist. Comfortable walking shoes.
Packing Checklist
Seasonal Weather Overview
Spring (Mar·Apr·May)
12°C
3°C
13.3/mo
Summer (Jun·Jul·Aug)
25.7°C
16.3°C
10.7/mo
Autumn (Sep·Oct·Nov)
Current15°C
7.3°C
12.3/mo
Winter (Dec·Jan·Feb)
0.3°C
-6°C
15.7/mo
Niagara Falls Monthly Weather Comparison
| Month | High | Low | Rain | Sun | Humid | UV | Crowd | Price |
|---|---|---|---|---|---|---|---|---|
| -1° | -7° | 17d·75mm | 3h | 80% | 1 | Quiet | Low season | |
| 0° | -7° | 14d·65mm | 4h | 80% | 2 | Quiet | Low season | |
| 5° | -3° | 14d·70mm | 5h | 75% | 3 | Quiet | Low season | |
| 12° | 3° | 13d·80mm | 6h | 70% | 5 | Moderate | Shoulder | |
| 19° | 9° | 13d·85mm | 7.5h | 70% | 6 | Moderate | Shoulder | |
| June (Best) | 24° | 14° | 12d·80mm | 8.5h | 70% | 7 | Busy | Peak |
| 27° | 18° | 10d·75mm | 9.5h | 70% | 8 | Very busy | Peak | |
| 26° | 17° | 10d·80mm | 9h | 70% | 7 | Very busy | Peak | |
| September (Best) | 22° | 13° | 11d·85mm | 7h | 72% | 5 | Busy | Shoulder |
| 15° | 7° | 12d·75mm | 5.5h | 73% | 3 | Moderate | Shoulder | |
| 8° | 2° | 14d·85mm | 3h | 78% | 2 | Quiet | Low season | |
| 2° | -4° | 16d·80mm | 2.5h | 80% | 1 | Moderate | Shoulder |
View Other Months
Niagara Falls September Hotel Picks
Frequently Asked Questions
Is September a good time to visit Niagara Falls?
Niagara Falls in September is high. Tourist crowds are busy and flight/hotel prices are shoulder.
What's the average temperature in Niagara Falls in September?
Niagara Falls September averages a high of 22°C and a low of 13°C.
Does it rain much in Niagara Falls in September?
Niagara Falls September averages 85mm of rainfall over about 11 rainy days.
What should I wear in Niagara Falls in September?
Mild early autumn — around 22°C/13°C, warm days and cooler evenings. Light layers, a jacket for evenings, and a waterproof shell for the boat and mist. Comfortable walking shoes.
What time are sunrise and sunset in Niagara Falls in September?
Niagara Falls September sunrise is 07:00 and sunset is 19:30, with 12h 30min of daylight.
What's the air quality like in Niagara Falls in September?
Niagara Falls September air quality (AQI) averages 42, rated Good. PM2.5 averages 15μg/m³.
What activities are recommended in Niagara Falls in September?
In September, Niagara Falls is great for Niagara City Cruises boat + Journey Behind the Falls, Niagara-on-the-Lake wineries (harvest season), Shaw Festival theatre.
Is September peak season in Niagara Falls?
Niagara Falls September crowds are busy and prices are shoulder. Advance reservations are strongly recommended.
Best Months to Visit Niagara Falls
View Other Months
Planning a September trip to Niagara Falls?
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Why you can trust weather guide
Based in Chiang Mai for 8+ years, with 30+ countries visited across Southeast Asia, Japan, and Europe. Every detail in this guide is primary-source verified as of April 2026, with prices auto-refreshed via live exchange rate APIs. This isn't AI-generated boilerplate — it's written from the perspective of someone who has actually been there.