Last updated: April 22, 2025
September in Niagara Falls, Canada presents a delightful blend of seasonal change and natural beauty. With maximum temperatures reaching 30°C (86°F) and an average of 19°C (66°F), the weather is ideal for outdoor exploration. However, early autumn brings potential for rain, as residents and visitors can anticipate around 75 mm (3.0 in) of precipitation over 9 days. Humidity levels hover around 76%, adding a touch of mugginess to the crisp air. This month offers a unique opportunity to witness the falls against a backdrop of vibrant fall colors while enjoying warm days and cool nights.
In September, Niagara Falls, Canada experiences a delightful transition into fall, with temperatures ranging from a comfortable 7°C (44°F) at night to a pleasant daytime high of 30°C (86°F). The average temperature sits around 19°C (66°F), making it an ideal time for outdoor activities and sightseeing amidst the stunning backdrop of the falls. As summer’s warmth lingers, September offers a unique blend of mild weather, hinting at the cooler months ahead, while still allowing visitors to enjoy the vibrant autumn colors starting to emerge.
In September, Niagara Falls experiences a moderate precipitation level of 75 mm (3.0 in) over just 9 days, marking a slight decrease compared to the wetter summer months. This trend of reduced rainfall is consistent with the transition into autumn, as temperatures begin to drop and atmospheric conditions shift. With July recording the highest precipitation at 125 mm (4.9 in), the drier September provides a brief respite from the more torrential summer weeks. As the season changes, residents can expect fluctuating weather patterns, leading towards October, which typically brings a sharp increase in rainfall, with an average of 128 mm (5.0 in) over 16 days.
As summer gives way to autumn, September in Niagara Falls experiences a subtle dip in humidity, averaging 76%. This marks a notable shift from the more oppressive levels of humidity seen in the peak summer months, where it hovers around 72%. Though September is slightly more humid than July and August, the air remains comfortably inviting. The gradual decrease in humidity from the heights of 91% in January down to September's levels indicates a transition towards fall, paving the way for crisper, refreshing days ahead. Visitors to the falls during this month can expect a pleasant blend of warmth and freshness, offering an ideal environment for enjoying the stunning natural beauty that the region is famous for.
In September, the UV Index in Niagara Falls, Canada, registers at a moderately high level of 7, indicating a transition as summer begins to wane. With a burn time of approximately 25 minutes, sun exposure becomes more significant compared to the cooler months. This month's UV levels, while lower than the peak summer months of June and July, still demand caution, especially for outdoor enthusiasts. As fall approaches, it's important to remain vigilant about sun protection—after all, UV rays can be deceptive in the cooler weather. For more detailed information, check out the Niagara Falls UV Index.
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As summer transitions into fall, September in Niagara Falls, Canada enjoys a lovely blend of warmth and sunshine, boasting 304 hours of sunlight. This delightful month reflects a gradual decline from the peak summer months of July and August, which together can claim over 340 hours of radiant sunshine. The warm days of September serve as a gentle reminder of the vibrant summer, while providing a picturesque backdrop for visitors to explore the stunning waterfalls and surrounding natural beauty. As the year wanes, September stands out with a significant amount of sunshine compared to the shorter days that follow in October, making it an ideal time to experience the enchanting colors of autumn against the dramatic landscape.
As September arrives in Niagara Falls, Canada, visitors can expect a pleasant blend of sun and clouds, with a 43% chance of sunny days. This aligns closely with the summer months, particularly August, which enjoys a slightly better probability of 46%. Notably, the likelihood of sunshine begins to taper off as the region transitions into October and the cooler months, where chances drop to 29%. Despite this gradual decline, September still offers a fair opportunity for sunshine just before autumn colors begin to take over, making it an inviting time for outdoor exploration and sightseeing.
As summer transitions to autumn in Niagara Falls, Canada, the month of September showcases a delightful balance in daylight, offering approximately 12 hours of sunlight. This marks a gentle decline from the sun-drenched days of June and July, which basked in 15 and 14 hours respectively. As we move through the month, daylight gradually diminishes, reflecting a natural shift as nature prepares for the cooler months ahead. September stands as a bridge between the vibrant long days of summer and the shorter, cozy evenings of fall, inviting both locals and visitors to savor the stunning fall colors illuminated by the waning light.
As September rolls in at Niagara Falls, the wind picks up slightly, averaging 4.0 m/s (9 mph). This marks a notable return to the breezier conditions felt in the earlier months of the year, following a summer of gentler gusts where July and August saw their lowest wind speeds of 3.3 m/s (7 mph) and 3.1 m/s (7 mph), respectively. With autumn approaching, the winds begin to mirror the sharper conditions of November and December, where they spike again, reaching 4.6 m/s (10 mph) and 5.1 m/s (11 mph). This transitional phase not only enhances the charm of the iconic waterfalls but also heralds the exciting shift in seasons, as nature gears up for the brisk days ahead.
The weather in Niagara Falls changes throughout the year, offering a unique experience in each season. Below is a month-by-month comparison of September's weather with other months, highlighting differences in temperature, precipitation, and other key factors. Click on each section to discover seasonal trends in Niagara Falls and find detailed weather information for every month.
September and January present strikingly different weather conditions. In September, temperatures typically range from a mild 7°C (44°F) at night to a warm maximum of 30°C (86°F), with an average of 19°C (66°F). The month experiences relatively low precipitation at 75 mm (3.0 in), over about 9 days, and humidity levels around 76%. In contrast, January brings frigid temperatures, with nightly lows plummeting to -19°C (-1°F) and daytime highs only reaching 14°C (58°F), averaging -2°C (28°F). This winter month sees slightly higher precipitation at 77 mm (3.0 in), spread across approximately 12 days, accompanied by a much higher humidity level of 91%. For more detailed insights on January weather, you can check Niagara Falls weather in January.
When comparing the weather in September and February, the contrast is striking. September generally enjoys milder temperatures, with averages around 19°C (66°F) and maximums reaching up to 30°C (86°F), while February experiences much colder conditions, with average temperatures typically hovering around -2°C (29°F) and dipping to as low as -19°C (-3°F). Additionally, September sees about 75 mm (3.0 in) of precipitation over 9 days, whereas February is slightly wetter with 82 mm (3.2 in) of precipitation spread across 14 days. The humidity levels are also notable; September has a humidity level of 76%, compared to the much higher 91% found in February. For more specific details about weather conditions in February, check out Niagara Falls weather in February.
September and March present contrasting weather conditions, reflecting a transition from summer to winter. In September, temperatures are much milder, with average highs around 19°C (66°F) and occasional peaks of 30°C (86°F), while March experiences much colder temperatures, typically averaging only 2°C (35°F) and dipping as low as -15°C (5°F). Precipitation levels are similar, with September receiving 75 mm (3.0 in) over nine days and March slightly less at 72 mm (2.8 in) over twelve days. Additionally, March tends to have higher humidity at 88%, compared to September's 76%. For those interested in exploring the weather specifics in March, you can find detailed information here: Niagara Falls weather in March.
When comparing the weather in September and April, notable differences emerge. September boasts a milder overall climate with average temperatures ranging from 7°C (44°F) to a warm 30°C (86°F) and lower humidity levels at 76%. In contrast, April experiences cooler temperatures, with averages between -4°C (26°F) and a maximum of 24°C (75°F), accompanied by higher humidity at 88%. Additionally, April tends to be wetter, recording 116 mm (4.6 in) of precipitation over 14 days, compared to September's 75 mm (3.0 in) over just 9 days. For more detailed insights, you can visit Niagara Falls weather in April.
When comparing the weather in September and May, notable differences emerge. September typically boasts a wider temperature range, with minimums around 7°C (44°F) and maximums reaching 30°C (86°F), averaging a comfortable 19°C (66°F). In contrast, May starts cooler, with minimums at 0°C (32°F) and a lower average of 13°C (56°F), even though it can still warm up to a pleasant 29°C (84°F). Precipitation is also more prominent in May, totaling 101 mm (4.0 in) over 13 days, compared to September's 75 mm (3.0 in) over 9 days. Additionally, humidity levels in May are slightly higher at 82%, while September's humidity sits at 76%. For more detailed insights, you can check Niagara Falls weather in May.
September and June showcase similar average temperatures, with September having a slightly lower minimum of 7°C (44°F) compared to June’s 8°C (47°F). Both months reach a maximum of 30°C (86°F)/(87°F), highlighting their warmth. However, September features slightly less precipitation at 75 mm (3.0 in) over 9 days, while June sees 81 mm (3.2 in) over 10 days, making September a bit drier. Humidity levels are also comparable, with September at 76% and June at 79%. For more on June weather specifically, you can check out Niagara Falls weather in June.
September's weather is generally milder than July's, with minimum temperatures dropping to 7°C (44°F) compared to July's 15°C (58°F). While September boasts an average temperature of 19°C (66°F) and a maximum of 30°C (86°F), July typically sees an average of 23°C (73°F) with highs reaching 32°C (90°F). In terms of precipitation, September experiences 75 mm (3.0 in) over 9 days, making it slightly drier than July, which has 125 mm (4.9 in) over 13 days. Humidity levels remain similar, with September at 76% and July slightly higher at 77%. For a more detailed look at July conditions, check the link: Niagara Falls weather in July.
In August, the weather tends to be warmer, with minimum temperatures around 13°C (56°F) and an average of 22°C (72°F), compared to September's cooler minimum of 7°C (44°F) and an average of 19°C (66°F). Both months experience similar maximum temperatures, peaking at 30°C (86°F). However, August sees slightly more precipitation, totaling 83 mm (3.3 in) over 13 days, while September has 75 mm (3.0 in) spread over 9 days. Notably, the humidity is slightly lower in August at 72%, compared to September's 76%. For more detailed insights into August weather, please refer to Niagara Falls weather in August.
As September transitions into October, the weather undergoes a noticeable shift. September typically sees milder temperatures, with a minimum of 7°C (44°F) and an average of 19°C (66°F), while October's temperatures dip further, reaching a low of 2°C (36°F) and an average of 13°C (55°F). Precipitation also increases significantly in October, with 128 mm (5.0 in) compared to September's 75 mm (3.0 in), leading to rain on more days—16 days in October versus 9 in September. Additionally, humidity rises from 76% in September to 83% in October, making October feel cooler and wetter. For more details, you can check the Niagara Falls weather in October.
September's weather is characterized by warmer temperatures, with a minimum of 7°C (44°F) and an average of 19°C (66°F), peaking at 30°C (86°F). The month experiences moderate humidity at 76%, along with 75 mm (3.0 in) of precipitation spread over 9 days. In contrast, November sees a significant drop in temperatures, featuring a minimum of -9°C (16°F) and an average of just 5°C (42°F), although it can still reach a maximum of 21°C (70°F). The humidity rises to 88%, and the month receives slightly more rainfall at 87 mm (3.4 in) over 13 days. For more detailed insights on November weather specifically, check out Niagara Falls weather in November.
September and December exhibit stark contrasts in weather, reflecting the transition from autumn to winter. In September, temperatures can range from a mild 7°C (44°F) at night to a warm peak of 30°C (86°F) during the day, with an average of 19°C (66°F). Despite receiving about 75 mm (3.0 in) of precipitation over 9 days, the humidity remains moderately high at 76%, giving the month a comfortable feel.
In contrast, December sees a significant drop in temperatures, with lows plummeting to -18°C (0°F) and an average temperature hovering around 1°C (34°F). The maximum temperature reaches only 17°C (62°F), and the month experiences a slightly higher precipitation level at 91 mm (3.6 in) over 15 days, with humidity rising to 87%. These conditions mark December as a chilly and wetter period compared to the more temperate September. For more detailed information, check Niagara Falls weather in December.
As September ushers in the transition from summer to fall, Niagara Falls experiences a delightful shift in weather, marked by milder temperatures and a noticeable increase in humidity. While the days can hit a warm 30°C, cool evenings bring a refreshing contrast, averaging around 19°C. This month typically sees more precipitation than the preceding summer months, with about nine rainy days, creating a vibrant backdrop for the stunning landscapes. The high humidity levels make the air feel particularly lush, offering a unique experience compared to drier periods earlier in the year. Embrace the charm of September as you explore the natural beauty of this iconic destination, and for more insights, visit Niagara Falls Climate.