Niagara Falls in September
In September, Niagara Falls averages 22°C (72°F) during the day and 15°C (58°F) at night, with frequent rain — about 16 days of the month see precipitation (81 mm total).
ShoulderConditions are comfortable for sightseeing without being sweltering. Expect daily rain or showers, often in heavy bursts.
September offers comfortable temperatures in Niagara Falls, with some rain to plan around.
How September compares to the rest of the year in Niagara Falls
September is in the middle of the year for warmth in Niagara Falls (4th of 12) and one of the driest months (12th of 12). Daytime temperature runs 9°C above the annual average (14°C). September runs 3°C cooler than August (26°C) and cools 7°C in October (15°C).
September sunrise & sunset in Niagara Falls
Times shown for Niagara Falls local time (America/Toronto), calculated for the 15th of September. They shift by a few minutes day to day across the month.
Photography light in Niagara Falls — September
Golden-hour and blue-hour windows for the 15th of September, in Niagara Falls's local time. Use these for soft warm light (golden) or cool architectural twilight (blue).
📅 When to book — Niagara Falls in September
Travel writers usually only tell you when to go. Here's when to book flights and lodging for the best mix of price and availability, based on September's tier (Shoulder) and Niagara Falls's popularity.
Crowds & pricing — September in Niagara Falls
Niagara Falls is in a shoulder season month — fewer crowds, slightly lower prices, and a calmer atmosphere than peak weeks. Most major sights stay open with normal hours, though a handful of seasonal restaurants or boat trips may run reduced schedules. Many regulars consider these months the best time to visit because you trade a small amount of weather reliability for a much more pleasant on-the-ground experience.
Why this tier: comfortable tourism weather
Sun & mosquito risk — September in Niagara Falls
UV is a clear-sky sea-level estimate — clouds, altitude, and reflective surfaces (snow, water) shift it ±30%. Mosquito risk is climate-derived only; for current disease advisories (dengue, malaria, zika) check the CDC or WHO travel pages before your trip.
Niagara Falls in other months
| Month | Avg high | Avg low | Rainfall | Rain days | Snow days |
|---|---|---|---|---|---|
| January | 0°C / 32°F | -7°C / 20°F | 72 mm | 21 | — |
| February | 1°C / 34°F | -7°C / 19°F | 80 mm | 19 | — |
| March | 6°C / 42°F | -3°C / 27°F | 78 mm | 18 | — |
| April | 13°C / 55°F | 3°C / 37°F | 103 mm | 19 | — |
| May | 20°C / 67°F | 9°C / 49°F | 76 mm | 17 | — |
| June | 24°C / 76°F | 15°C / 59°F | 100 mm | 17 | — |
| July | 27°C / 80°F | 18°C / 65°F | 104 mm | 21 | — |
| August | 26°C / 78°F | 18°C / 64°F | 86 mm | 19 | — |
| September | 22°C / 72°F | 15°C / 58°F | 81 mm | 16 | — |
| October | 15°C / 60°F | 9°C / 47°F | 106 mm | 20 | — |
| November | 8°C / 47°F | 2°C / 35°F | 77 mm | 19 | — |
| December | 4°C / 39°F | -2°C / 29°F | 78 mm | 19 | — |
Other cities with similar September weather
🌍 See the full ranked list of climate twins for Niagara Falls in September →
Frequently asked questions
How hot is Niagara Falls in September?
In September, Niagara Falls averages a high of 22°C (72°F) and a low of 15°C (58°F) — generally mild and pleasant.
Does it rain a lot in Niagara Falls in September?
September is quite rainy in Niagara Falls, with about 16 rainy days on average.
Is September a good time to visit Niagara Falls?
September is mild and pleasant but on the rainy side. It suits travelers who are comfortable with mild and pleasant weather; check the month-by-month ranking to compare it against the rest of the year.
What should I pack for Niagara Falls in September?
Pack light layers for warm days and cooler evenings, plus a compact umbrella or rain jacket. See the full September packing list for Niagara Falls for a complete, climate-based checklist.
Check the live 10-day forecast and sunrise/sunset.