September Weather in Sault Ste. Marie, United States

Last updated: February 24, 2025

September in Sault Ste. Marie, United States showcases a delightful transition into autumn, characterized by a maximum temperature peaking at 29°C (85°F) and a comfortable average of 14°C (58°F). While the minimum can dip to a brisk 2°C (36°F), the month embraces 77% humidity, fostering a rich atmospheric experience. With 114 mm (4.5 in) of rainfall spread over 13 days, the region's lush landscapes remain vibrant, making September a picturesque time to explore the natural beauty and seasonal changes in this charming locale.

September Temperature in Sault Ste. Marie

In September, Sault Ste. Marie experiences a delightful transition from the summer warmth into the cooler embrace of autumn. With a minimum temperature of 2°C (36°F), residents can enjoy the crisp air while average temperatures hover around 14°C (58°F), making it an ideal time for outdoor activities. The maximum temperature can still reach a pleasant 29°C (85°F), allowing for those last few balmy days before the chill sets in. This gradual decline in temperatures is a precursor to the winter months, with September marking a significant drop from the summer highs, yet still offering the lingering warmth of late summer. As the month progresses, the vibrant colors of fall begin to emerge, creating a picturesque setting against the backdrop of the cooling temperatures.

September Weather in Sault Ste. Marie: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Sault Ste. Marie, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends.
JanFebMarAprMayJunJulAugSepOctNovDec161725365061676558473223
Data source: Temperature data for Sault Ste. Marie generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

September Precipitation in Sault Ste. Marie

In September, Sault Ste. Marie experiences a notable increase in precipitation, with 114 mm (4.5 in) recorded over 13 days. This marks a slight rise from the 112 mm seen in August while also aligning with the trend of late summer and early fall bringing wetter conditions. As the region transitions into autumn, these increased rain levels set a path for the upcoming months, where precipitation continues to rise, peaking in October at 134 mm (5.3 in). This gradual escalation in rainfall reflects the changing weather patterns, illustrating how September serves as a bridge between the drier summer months and the wetter fall season.

September Precipitation Trends in Sault Ste. Marie

The chart displays monthly precipitation patterns in Sault Ste. Marie, with values for each month alongside September's data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how September's conditions compare to those of other months.
JanFebMarAprMayJunJulAugSepOctNovDec4663548875113741131141347867
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Sault Ste. Marie

As summer fades into autumn, September in Sault Ste. Marie experiences a noticeable rise in humidity, with levels reaching 77%. This marks a transitional phase, as the humidity gently rebounds from the lower levels of July and August, which saw averages of 69% and 72%, respectively. Following the peak warmth of summer, the return of increased moisture hints at the approaching fall, reminiscent of the dampness seen in the late spring. With humidity levels climbing towards October’s 85%, September acts as a bridge, setting the stage for the wetter months ahead, while still retaining traces of the warmth of summer.

September Average Humidity in Sault Ste. Marie

This chart illustrates the average monthly humidity levels in Sault Ste. Marie, with September's data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, allowing you to see how September's humidity levels compare to other months.
JanFebMarAprMayJunJulAugSepOctNovDec95%94%89%87%74%72%69%72%77%85%88%93%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Sault Ste. Marie

As summer transitions to autumn, September in Sault Ste. Marie sees a notable decrease in UV intensity, with a UV Index of 7, categorized as high. This marks a shift from the extreme values of 8 and 9 observed in the preceding months of July and August, where brief sun exposure equated to a burn time of just 15 minutes. In September, the burn time extends to 25 minutes, allowing for more outdoor enjoyment while still requiring sun protection. Such trends underscore the importance of staying vigilant during this month, as UV levels remain significant. For a comprehensive overview of UV trends throughout the year, visit Sault Ste. Marie UV Index.

Maximum UV Index Levels in Sault Ste. Marie for September

The chart shows the monthly maximum UV Index (UVI) for Sault Ste. Marie in September, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues.
JanFebMarAprMayJunJulAugSepOctNovDec245789987532
Data source: Sault Ste. Marie September UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

September Sunshine in Sault Ste. Marie

As summer gracefully transitions to fall, September in Sault Ste. Marie enjoys a generous 258 hours of sunshine, maintaining the warmth of the preceding months. This significant amount reflects a gradual decline from the sun-soaked heights of July and August, which basked in 347 and 320 hours respectively. The extended daylight hours in May and June, peaking at 305 and 326, hint at a thriving summer that nurtured vibrant outdoor activities. However, as the days shorten, it's clear that September offers a beautiful balance, making it an ideal time for exploring the stunning natural scenery before the cooler months set in. As autumn approaches, the remaining sunlight gives a delightful farewell to summer, setting the stage for the cozy days ahead.

Monthly Sunshine Duration in Sault Ste. Marie: September Highlighted

The September sunshine duration represents the total number of hours Sault Ste. Marie experiences direct sunlight during the month of September, excluding cloudy or obstructed periods. This chart compares the sunshine duration of September with the other months of the year.
JanFebMarAprMayJunJulAugSepOctNovDec101h148h232h239h305h326h347h320h258h185h123h104h
Data source: Sault Ste. Marie September Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Sault Ste. Marie During September

As summer fades, September in Sault Ste. Marie offers a moderately sunny experience, with a 46% chance of sunshine gracing the skies. This marks a slight dip from the sunny peak of 57% in July, yet it maintains a comfortable position compared to the earlier months of the year. Notably, as we transition from the heat of summer, September holds better odds for sun than both June and August, which are 41% and 49% respectively. With autumn approaching, the likelihood of sunny days becomes less predictable, yet September still promises enough sunny spells to enjoy the changing colors of the season before the colder months set in.

Percentage of Sunny Days in September in Sault Ste. Marie

The chart illustrates the percentage of sunny days in Sault Ste. Marie throughout the year, with September highlighted. It highlights the variation in sunshine across each month and provides an overview of the typical frequency of sunny days, offering insights into how often Sault Ste. Marie experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec18%22%41%32%51%41%57%49%46%31%28%16%
Data source: Sault Ste. Marie September chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Sault Ste. Marie in September

As summer transitions into autumn, September in Sault Ste. Marie sees a delightful shift in daylight, offering approximately 12 hours of sunshine each day. This marks a gradual decline from the peak brightness of 15 hours enjoyed in the summer months of June and July. As daylight begins to wane, we witness a gentle fading from the vibrant energy of summer into the cozy embrace of fall. September acts as a bridge, softly melding the longer days of summer with the shorter, more introspective hours of October, which features just 10 hours of daylight. This month captures the essence of changing seasons, where daylight provides a beautiful backdrop for enjoying the outdoors before the twilight of autumn sets in.

Average Daylight Hours in Sault Ste. Marie for September

The chart illustrates the variation in daylight duration in Sault Ste. Marie throughout the year, with September highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec9h 2m10h 19m11h 57m13h 36m15h 1m15h 44m15h 21m14h 5m12h 29m10h 50m9h 22m8h 37m
Data source: Sault Ste. Marie daylight hours, calculated by summing the hours between sunrise and sunset for each day.

September Winds in Sault Ste. Marie

As summer gives way to autumn in Sault Ste. Marie, September brings a gentle breeze with an average wind speed of 3.4 m/s (8 mph). This slight uptick from the previous months suggests a transition as the air cools, with winds remaining steady in the range typical for early fall. Interestingly, September marks a peak in wind speed, aligning closely with both November and April, while July experiences the calmest conditions of the year at just 2.6 m/s (6 mph). As the season progresses, the winds begin to pick up again in October and November, hinting at the nostalgic strength of winter's approach. Overall, September is a serene month that blends summer's warmth with the impending chill of fall, all accompanied by that refreshing wind.

Average September Wind Speed in Sault Ste. Marie

The chart displays monthly wind speed patterns in Sault Ste. Marie, with values for each month shown alongside September's data, which is highlighted for easy comparison. It illustrates the average wind speed, offering insights into how September's wind conditions compare to the rest of the year.
JanFebMarAprMayJunJulAugSepOctNovDec2.93.54.13.93.33.12.63.03.4 m/s2.93.44.2
Data source: Sault Ste. Marie September wind data, generated using information from the Copernicus Climate Change Service.

How September Weather in Sault Ste. Marie Compares to Other Months

The weather in Sault Ste. Marie 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 Sault Ste. Marie and find detailed weather information for every month.

When comparing the weather in September and January, there is a stark contrast in temperature and precipitation. September sees a minimum of 2°C (36°F), an average of 14°C (58°F), and a maximum of 29°C (85°F), with a total precipitation of 114 mm (4.5 in) spread across 13 days, resulting in a relatively humid environment at 77%. In contrast, January brings frigid conditions with temperatures plummeting to a minimum of -34°C (-28°F), an average of -9°C (17°F), and a maximum of only 5°C (41°F). Precipitation is significantly lower at 46 mm (1.8 in) over 10 days, yet the humidity remains high at 95%, contributing to a bone-chilling cold. For more detailed information, you can check Sault Ste. Marie weather in January.

September and February present strikingly different weather patterns. In September, temperatures range from a minimum of 2°C (36°F) to a maximum of 29°C (85°F), with an average temperature of 14°C (58°F). The month also sees substantial precipitation at 114 mm (4.5 in) spread over 13 days, coupled with a humidity level of 77%. In contrast, February experiences much colder conditions, with temperatures dipping as low as -27°C (-16°F) and peaking at just 7°C (45°F). The average temperature for February sits at a frigid -8°C (17°F), accompanied by lower precipitation levels of 63 mm (2.5 in) over 12 days and higher humidity at 94%. For more specific details on February weather, you can check Sault Ste. Marie weather in February.

September and March present starkly contrasting weather conditions. In September, temperatures range from a mild 2°C (36°F) to a warm 29°C (85°F), with an average of 14°C (58°F), while March experiences much colder temperatures, with a minimum of -22°C (-8°F) and a maximum of only 12°C (53°F), averaging -4°C (26°F). Additionally, September sees a higher amount of precipitation at 114 mm (4.5 in) over 13 days, compared to March's 54 mm (2.1 in) spread over 10 days. Humidity also varies, with September displaying a moderate 77%, while March is more humid at 89%. For more details, you can visit Sault Ste. Marie weather in March.

In comparing the weather of September and April, we see distinct differences in temperature and precipitation patterns. September boasts milder conditions, with average temperatures ranging from 2°C (36°F) at night to a warm 29°C (85°F) during the day, along with a total precipitation of 114 mm (4.5 in) over 13 days, contributing to a comfortable humidity level of 77%. In contrast, April experiences cooler temperatures, with a minimum of -13°C (10°F) and a maximum of 17°C (64°F), while receiving slightly less precipitation at 88 mm (3.5 in) over 14 days, resulting in higher humidity at 87%. For more detailed insights on April weather, visit Sault Ste. Marie weather in April.

In comparing the weather of September and May, September presents a wider temperature range, with minimums around 2°C and maximums reaching 29°C, leading to a much warmer average of 14°C. In contrast, May is cooler overall, featuring minimum temperatures of -3°C and an average of 10°C, with maximums peaking at 26°C. Precipitation also differs between the two months, with September experiencing more rainfall at 114 mm over 13 days compared to May's 75 mm over just 9 days. The humidity remains relatively similar, at 77% in September and 74% in May. For those interested in the specifics of May weather, they can explore more through this link: Sault Ste. Marie weather in May.

When comparing the weather in September and June, you'll find some notable similarities and differences. Both months experience a maximum temperature of 29°C (85°F), but June boasts a slightly higher average temperature of 16°C (61°F) compared to September's 14°C (58°F). The minimum temperatures are relatively close, with September ranging from 2°C (36°F) to 3°C (38°F) in June. Rainfall is comparable, with September recording 114 mm (4.5 in) over 13 days and June slightly less at 113 mm (4.4 in) over 10 days. Additionally, September has a higher humidity level of 77%, whereas June’s humidity stands at 72%. For a more detailed look at June's weather patterns, you can check out Sault Ste. Marie weather in June.

When comparing the weather in September to that of July, notable differences emerge. September tends to be cooler, with average temperatures ranging from a minimum of 2°C (36°F) to a maximum of 29°C (85°F), while July remains warmer, with temperatures ranging from 9°C (49°F) to 30°C (87°F). Additionally, September experiences more precipitation, averaging 114 mm (4.5 in) over 13 days, compared to July's 74 mm (2.9 in) over just 7 days. The humidity is also higher in September at 77%, while July has a more comfortable 69%. For more details on July weather, visit Sault Ste. Marie weather in July.

In comparing the weather between September and August, we observe a notable shift in temperatures and humidity levels. September experiences a broader temperature range, with a minimum of 2°C (36°F) and a maximum of 29°C (85°F), bringing in cooler nights compared to August's minimum of 6°C (44°F) and a high of 28°C (83°F). While both months have similar precipitation levels—with September at 114 mm (4.5 in) over 13 days and August slightly lower at 112 mm (4.4 in) over 11 days—September's humidity level is higher at 77%, compared to August's 72%. This increase in humidity in September may contribute to a more sultry feel, even as temperatures begin to drop. For a detailed look at August's weather patterns, you can visit Sault Ste. Marie weather in August.

September weather in Sault Ste. Marie tends to be milder, with temperatures ranging from a low of 2°C (36°F) to a high of 29°C (85°F) and an average of 14°C (58°F). The month sees significant rainfall, totaling 114 mm (4.5 in) over about 13 days, accompanied by a humidity level of 77%. In contrast, October brings a more pronounced chill, with temperatures dropping to a minimum of -8°C (19°F) and an average of 8°C (47°F), peaking at 23°C (73°F). Precipitation increases slightly to 134 mm (5.3 in) over 16 days, and the humidity rises to 85%. For more detailed information, you can check Sault Ste. Marie weather in October.

September and November present contrasting weather conditions. In September, temperatures range from a minimum of 2°C (36°F) to a warm maximum of 29°C (85°F), with an average of 14°C (58°F). The month is relatively humid with an average of 77%, and precipitation occurs over 13 days, totaling 114 mm (4.5 in). In stark contrast, November experiences much colder temperatures, with a minimum of -20°C (-3°F) and an average of 0°C (32°F), peaking at 20°C (69°F). Despite having less total precipitation at 78 mm (3.1 in), November is marked by 15 rainy days and higher humidity at 88%. For more detailed insights, check out Sault Ste. Marie weather in November.

September and December present stark contrasts in weather conditions. In September, temperatures range from a mild 2°C (36°F) at night to a warm 29°C (85°F) during the day, with an average of 14°C (58°F). While precipitation is relatively high at 114 mm (4.5 in) and occurs over 13 days, humidity remains moderate at 77%. In contrast, December brings much colder temperatures, with a chilling minimum of -29°C (-20°F) and an average of -5°C (23°F), peaking at a mere 12°C (53°F). Precipitation is lower at 67 mm (2.7 in) but occurs on 14 days, accompanied by a notably higher humidity of 92%. For more details, you can check Sault Ste. Marie weather in December.

Compare Sault Ste. Marie's Climate with Cities Worldwide

Conclusion: What to Expect From September Weather in Sault Ste. Marie

As September rolls in, Sault Ste. Marie experiences a notable shift in weather, characterized by cooler temperatures that range from refreshing mornings to pleasantly warm afternoons. While the summer heat lingers with highs reaching up to 29°C, the average settles at a more moderate 14°C, offering a welcome respite from the peak summer warmth. This month also ushers in increased precipitation, with the skies gracing the region on about half the days, contributing to the lush autumnal scenery. With an average humidity of 77%, the air carries a crispness that signals the transition to fall. For those interested in learning more about the unique climate of this region, explore the detailed insights at Sault Ste. Marie Climate.