Last updated: February 24, 2025
Experience the September weather of Alexandria Bay, United States, where the transition from summer to fall brings a delightful variety of temperatures. Expect maximum highs reaching 30°C (86°F), while the average temperature hovers around a comfortable 17°C (63°F). On cooler days, temperatures may dip to a minimum of 3°C (38°F). The region sees about 70 mm (2.8 in) of rainfall, distributed across approximately 9 days, contributing to the lush greenery. With a humidity level of 72%, the air is pleasantly crisp, making September an ideal time for exploring this picturesque locale.
September in Alexandria Bay marks a distinct transition as summer gracefully ebbs into fall. With temperatures ranging from a brisk 3°C (38°F) in the early mornings to a comfortable 30°C (86°F) during the day, both early fall charm and lingering warmth are on display. The average temperature settles at a pleasant 17°C (63°F), inviting outdoor activities along the stunning shoreline. As daylight hours gradually shorten, the mix of cooler evenings and warm afternoons creates a perfect setting for enjoying the natural beauty of the region. This month encapsulates the start of a vibrant seasonal shift, making it a delightful time for visitors to explore Alexandria Bay's rich landscapes.
In September, Alexandria Bay experiences a notable decline in precipitation, receiving only 70 mm (2.8 in) over 9 days. This marked decrease follows the wetter summer months, where July peaked at 131 mm and August at 99 mm. As autumn approaches, the pattern of rainfall shifts, with precipitation levels beginning to rise again in October, which averages 156 mm. This trend indicates a transition from the lush, summer thunderstorms, to the crisp, drier conditions of early fall, allowing residents to enjoy clearer skies even as the seasons change.
In September, Alexandria Bay experiences a modest rise in humidity, averaging around 72%. This marks a transition from the drier summer months of June and August, which recorded the year's lowest humidity levels at 68% and 67%, respectively. As the warmth of summer fades, humidity begins to creep back up, reflecting the onset of autumn. Notably, this upward trend continues into the cooler months, with October seeing a significant jump to 83%, and humidity levels remaining consistently high through winter. Overall, September serves as a bridge between the summer's drier air and the wetter, chillier months ahead, encouraging a refreshing change in the atmosphere.
In September, Alexandria Bay experiences a notable shift in UV index, reflecting the transitional nature of early fall. With a UV Index of 7, categorized as high, residents and visitors should be mindful of their sun exposure, as the recommended burn time decreases to 25 minutes. This month marks a decrease from the very high levels of summer, characterized by an index of 9 from April through August. However, even in September, the sun remains strong, urging a cautious approach especially during midday hours. As outdoor activities beckon in the crisp autumn air, those venturing outside should consider protective measures to enjoy the beautiful scenery safely. For more detailed information on UV levels throughout the year, visit Alexandria Bay UV Index.
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As summer begins to fade into autumn, September in Alexandria Bay showcases a beautiful transition with a generous 280 hours of sunshine, marking a warm embrace of early fall. This month retains a substantial amount of sunlight compared to the peak summer months, although it does represent a notable decrease from the height of July's 336 hours. Interestingly, September's daylight is still markedly higher than the cold and gray of January (110 hours) or even November (148 hours), illustrating how this time of year offers a delightful balance between warmth and cooler breezes. As the days grow shorter and the vibrant fall foliage begins to emerge, September continues to invite exploration and enjoyment in this picturesque locale.
In Alexandria Bay, September boasts a 40% chance of sunny weather, making it one of the more favorable months for sunshine as summer transitions into fall. This percentage is a slight dip from the sunnier days of August, which enjoys 43%, yet still outshines the earlier months of the year, especially the bleak January at just 22%. The trend shows that as the year progresses, there is generally an upward trajectory in sunshine probability, peaking around the mid-year. Thus, while September might not capture the full brilliance of summer, it certainly offers a pleasant balance of sunny days and cooler temperatures, inviting visitors to enjoy the beauty of Alexandria Bay.
As summer wanes, September in Alexandria Bay marks a gentle transition with approximately 12 hours of daylight. Following the peak brilliance of 15 hours in June and July, the days gradually shorten, signaling the approach of autumn. The decline from the vibrant 14 hours in May to 13 hours in August sets the stage for September's slightly muted light, inviting a cozy atmosphere. This ebb in daylight hints at the seasonal change, where the lush greens of summer prepare for the warm hues of fall, providing an enchanting backdrop for outdoor activities and evening strolls as daylight begins its retreat once more.
In September, Alexandria Bay experiences a gentle breeze with an average wind speed of 3.2 m/s (7 mph), aligning closely with the patterns observed in the preceding months. Following a notable peak in March at 3.8 m/s (8 mph), the winds display a gradual decline through the summer, reaching their lowest in August at 2.5 m/s (6 mph). Yet, as autumn approaches, there’s a slight uptick in wind speeds, suggesting a transition that breathes life into the vibrant fall atmosphere. Interestingly, September's winds are comparable to the calmness of February and October, illustrating a consistent backdrop that enriches the scenic beauty of Alexandria Bay. As the season shifts, these subtle changes in wind provide a refreshing reminder of the nature’s rhythms that define this picturesque locale.
The weather in Alexandria Bay 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 Alexandria Bay and find detailed weather information for every month.
In September, the weather is mild and varied, with temperatures ranging from a minimum of 3°C (38°F) to a maximum of 30°C (86°F) and an average of 17°C (63°F). This month experiences around 70 mm (2.8 in) of precipitation over approximately 9 days, accompanied by a humidity level of 72%. In contrast, January brings much colder conditions, with temperatures plummeting to a minimum of -27°C (-16°F), an average of -5°C (23°F), and a maximum of 12°C (53°F). Precipitation increases to 82 mm (3.2 in) across 12 days, while the humidity is relatively high at 93%. For a more detailed look at January weather, visit Alexandria Bay weather in January.
September and February present strikingly contrasting weather patterns. In September, temperatures range from a mild 3°C (38°F) at night to a warm 30°C (86°F) during the day, with an average temperature of 17°C (63°F). The month experiences around 70 mm (2.8 in) of precipitation over approximately 9 days, accompanied by a humidity level of 72%. In contrast, February is characterized by much colder conditions, with temperatures plummeting to a minimum of -23°C (-9°F) and a maximum of only 13°C (56°F), resulting in an average temperature of -4°C (25°F). Precipitation increases to 80 mm (3.2 in) over 13 days, along with a higher humidity level of 93%. For a more detailed look at February's weather, you can check Alexandria Bay weather in February.
When comparing the weather in September and March, a striking contrast emerges. September boasts a milder range of temperatures, with minimums around 3°C (38°F) and maximums reaching up to 30°C (86°F), creating an average of 17°C (63°F). This month experiences moderate rainfall, with about 70 mm (2.8 in) of precipitation spread over 9 days and a humidity level of 72%.
In contrast, March is significantly colder, with temperatures dipping as low as -18°C (0°F) and averaging around 0°C (32°F) before peaking at 19°C (66°F). Precipitation increases slightly to 83 mm (3.2 in) across 11 days, accompanied by a higher humidity level of 86%. For more specific details about March weather, you can visit Alexandria Bay weather in March.
When comparing the weather in September and April, notable differences emerge. September typically boasts a wider temperature range with minimums of 3°C (38°F) and maximums reaching up to 30°C (86°F), offering an average temperature of 17°C (63°F). In contrast, April starts off cooler, with lows around -7°C (20°F) and highs peaking at 26°C (79°F), resulting in an average temperature of only 6°C (43°F). Precipitation is also noteworthy; September experiences 70 mm (2.8 in) of rain across about 9 days, while April is wetter, receiving 127 mm (5.0 in) over 14 days. The humidity levels are similar, with September at 72% and April slightly higher at 82%. For more detailed insights, you can check Alexandria Bay weather in April.
In comparing the weather between September and May, September tends to be warmer overall, with average temperatures ranging from a minimum of 3°C (38°F) to a maximum of 30°C (86°F), while May has cooler averages, with temperatures dipping as low as -1°C (30°F) and also reaching up to 30°C (86°F). Precipitation is higher in May, totaling 100 mm (3.9 in) over approximately 12 days, compared to September's 70 mm (2.8 in) over 9 days. Both months exhibit relatively high humidity, with September at 72% and May slightly higher at 75%. For those interested in exploring May weather in more detail, check out Alexandria Bay weather in May.
When comparing the weather in June and September, we notice some distinct differences. June generally has slightly warmer temperatures, with minimums around 5°C (42°F) compared to September's 3°C (38°F). The average temperature in June is 18°C (65°F), while September sees an average of 17°C (63°F). Additionally, June tends to be a bit wetter, with 94 mm (3.7 in) of precipitation over 11 days, compared to September's 70 mm (2.8 in) across 9 days. The humidity in both months is fairly similar, with June at 68% and September at 72%. Overall, June offers a slightly warmer and wetter experience than September. For a more detailed look at rain patterns, check out Alexandria Bay weather in June.
When comparing the weather in September to that of July, we notice some distinct differences. September experiences a broader range of temperatures, with minimums dropping to around 3°C (38°F) and maximums reaching 30°C (86°F), resulting in an average temperature of 17°C (63°F). In contrast, July is warmer, with a minimum temperature of 13°C (55°F), an average of 22°C (72°F), and maximums hitting 32°C (90°F). Additionally, July sees significantly more precipitation, totaling 131 mm (5.2 in) over 14 rainy days, compared to September's 70 mm (2.8 in) over 9 days. Humidity levels are relatively similar, with September at 72% and July slightly lower at 69%. This snapshot clearly highlights July as the warmer, wetter month, while September offers a more varied temperature range with less rainfall. For more details, you can check Alexandria Bay weather in July.
In comparing the weather between September and August, September displays a notable shift in temperature and precipitation patterns. September experiences a wider temperature range, with minimums dropping to 3°C (38°F) while still enjoying maximums of 30°C (86°F), leading to a lower average of 17°C (63°F) compared to August's warmer average of 21°C (71°F). Additionally, September sees increased rainfall, with 70 mm (2.8 in) over 9 days, while August records a higher total of 99 mm (3.9 in) across 13 days, reflecting a slightly wetter summer. Humidity in September is also higher at 72%, compared to August's 67%. For more details, you can check Alexandria Bay weather in August.
September's weather showcases a warm transition from summer, with temperatures ranging from a minimum of 3°C (38°F) to a maximum of 30°C (86°F), and an average of 17°C (63°F). Despite experiencing some rainfall totaling 70 mm (2.8 in) over 9 days, the humidity remains manageable at 72%.
In contrast, October brings a notable shift, with cooler temperatures ranging from a minimum of -2°C (29°F) to a maximum of 24°C (75°F) and an average of 11°C (52°F). The month also sees an increase in precipitation, totaling 156 mm (6.1 in) over 14 days, and humidity climbs to 83%. This change makes October a wetter and chillier month compared to September. For more detailed insights, check out Alexandria Bay weather in October.
September and November present contrasting weather patterns. September typically enjoys mild conditions with temperatures ranging from a minimum of 3°C (38°F) to a maximum of 30°C (86°F) and an average of 17°C (63°F). In contrast, November sees much cooler temperatures, with lows plummeting to -13°C (9°F) and an average of only 4°C (39°F). Additionally, November experiences more precipitation, totaling 117 mm (4.6 in) over 14 days, compared to September's 70 mm (2.8 in) over 9 days. The humidity also rises in November, reaching 88%, whereas September has a relatively lower humidity level of 72%. For more detailed information, you can check Alexandria Bay weather in November.
In September, Alexandria Bay experiences a warm transition into autumn, with temperatures ranging from a mild 3°C (38°F) at night to a comfortable average of 17°C (63°F) during the day, peaking at a warm 30°C (86°F). The month sees an average of 70 mm (2.8 in) of precipitation over 9 days, accompanied by a moderate humidity level of 72%.
In stark contrast, December brings much colder conditions, with nighttime temperatures plummeting to a frigid -23°C (-9°F) and daytime averages hovering around -1°C (30°F). The maximum temperature reaches only 14°C (58°F). Precipitation increases to 98 mm (3.8 in) over 13 days, alongside a higher humidity of 89%, which can make the chilly air feel even more biting. For more detailed weather information, you can visit Alexandria Bay weather in December.
As summer transitions to autumn, September in Alexandria Bay presents a delightful mix of warm days and cool evenings. With temperatures averaging a pleasant 17°C (63°F), this month stands out from the sweltering heat of July and August, while still offering a few sunny days that can peak at a toasty 30°C (86°F). Rainfall is moderate, with about nine days experiencing precipitation, adding a refreshing touch to the air, which can feel quite humid at 72%. With this comfortable weather, September invites residents and visitors alike to explore the beauty of Alexandria Bay in a way that other months may not. For a deeper dive into the area's weather patterns, check out Alexandria Bay Climate.