Last updated: February 24, 2025
In September, Grand Marais, United States experiences mild temperatures, with a maximum of 23°C (73°F) and a comfortable average of 13°C (56°F), dipping down to a minimum of 2°C (36°F) at night. This transition into autumn brings about 103 mm (4.1 in) of precipitation across 12 days, creating a lush and vibrant landscape. With an average humidity level of 73%, the air carries a refreshing crispness, inviting both locals and visitors to embrace the outdoor beauty of this charming town during the fall season.
As September unfolds in Grand Marais, United States, it marks the transition from summer's warmth to the crispness of autumn. Temperatures begin to cool, with minimums dropping to 2°C (36°F) and averages settling around 13°C (56°F), while maximums can still reach a pleasant 23°C (73°F). This mild variability offers a delightful backdrop for outdoor activities, as the landscape begins to don its fall colors. Compared to the sweltering highs of July and August, September’s weather provides a refreshing change, inviting both locals and visitors to embrace the seasonal shift. As the days grow shorter and the nights cooler, the charm of Grand Marais is amplified, setting the stage for the beautiful autumn ahead.
In September, Grand Marais experiences a notable surge in precipitation, recording 103 mm (4.1 inches), making it the wettest month of the year. This spike in rainfall aligns with a trend of increasing precipitation from the warmer summer months, with August already reaching 78 mm (3.1 inches). The number of rainy days also rises, hitting 12 days this month, which is indicative of the more unsettled weather as fall approaches. Comparatively, preceding months show a gradual increase in both rainfall and rainy days, hinting at a seasonal shift that not only brings more moisture but also transforms the landscape into a vibrant display of autumn foliage nourished by the early fall rains.
In September, Grand Marais experiences a touch of relief from the high humidity that dominates the winter months, with levels settling at 73%. This slight decline continues the general trend observed through the summer, where humidity levels typically hovered around 71% during the peak months of July and August. As the transition into fall begins, humidity still remains notable, higher than what is seen in spring and early summer. With September's conditions striking a balance between the lingering warmth of summer and the impending chill of autumn, residents and visitors can enjoy a refreshing coastal atmosphere before the humidity begins its upward climb again in October.
As summer fades in Grand Marais, September's UV Index shows a decrease to 7, placing it in the high exposure category with a burn time of 25 minutes. This change signifies a transition from the intense summer sun, where the index peaked at a formidable 9 in July and June, to a more moderate but still notable level of sun exposure. Interestingly, while September's UV Index is lower than the heights of August and July, it remains significantly higher than the winter months, reflecting the lingering warmth of late summer. To stay protected during this month, enjoy outdoor activities responsibly and check out the comprehensive information at Grand Marais UV Index.
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As summer gently fades into autumn, September in Grand Marais offers a delightful transition, with 253 hours of sunshine that provide a warm farewell to the vibrant summer months. This period sees a notable dip from the sunshine peak of July, which boasts an impressive 357 hours, yet the hours remain abundant compared to the bleak winter months ahead. Following the sun-drenched days of June and July, September’s sunlight plays a crucial role in extending outdoor activities and enjoying the rich landscapes. While the sun may slip further from its summer zenith, this month still champions a perfect balance, allowing visitors to soak in the lingering warmth before the cooler days of October arrive. The pattern reveals a predictable ebb and flow of sunlight across the seasons, with September holding a unique charm that invites exploration and reflection.
As summer transitions to fall in Grand Marais, September emerges as a month with a noteworthy probability of sunny weather, boasting a 49% chance of sunshine. This figure signifies a decline from the peak sun-filled days of July and August, where the chances soared to 64% and 56%, respectively. However, September maintains a pleasant balance, retaining nearly half the month under the sun's embrace. As the year progresses towards the colder months of October and November, where sunny days dwindle to 31% and 32%, September stands as a significant turning point, enveloped in a beautiful late-summer glow before the chill sets in.
As summer transitions into autumn, September in Grand Marais offers a gradual decrease in daylight, with an average of 12 hours of sunshine. This marks a shift from the extended brightness of the summer months, where daylight peaked at 15 hours in June and July. The month starts to embrace the cozy embrace of fall, reflecting nature's cyclical rhythm. Following the vibrant summer, September serves as a gentle reminder of the days growing shorter, as it dips from the 14 hours of August but still retains a significant amount of light compared to the deeper winter months ahead. The evolving daylight captures the essence of the changing seasons—inviting moments of reflection and preparation for what lies ahead.
In September, Grand Marais experiences a gentle shift in its wind patterns, with an average wind speed of 4.0 m/s (9 mph). This is a notable drop from the breezier summer months, where July and August saw higher gusts at 3.3 m/s (7 mph) and 4.4 m/s (10 mph), respectively. As autumn approaches, the winds start to calm after the energetic summer season, before picking up again in November with an average of 5.7 m/s (13 mph). This gradual decline in wind speeds through the late summer creates a serene atmosphere, perfect for enjoying the vibrant fall colors while hinting at the winter gales to come. Overall, September's milder breezes reflect a transitional period, where nature prepares for the change of seasons, inviting both locals and visitors to savor the tranquility of Grand Marais.
The weather in Grand Marais 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 Grand Marais and find detailed weather information for every month.
When comparing the weather in September and January, it's evident that these two months represent stark contrasts in temperature and conditions. September typically features milder temperatures, with a minimum of 2°C (36°F) and an average of 13°C (56°F) peaking at 23°C (73°F). The month also experiences considerable rainfall, averaging 103 mm over 12 days, combined with a humidity level of 73%. In contrast, January sees much harsher conditions, where temperatures plunge to a minimum of -28°C (-19°F) and an average of -9°C (15°F), with a maximum of only 3°C (38°F). Precipitation decreases significantly to 33 mm over 7 days, coupled with higher humidity at 93%. For a more detailed perspective on the winter climate, check out Grand Marais weather in January.
September and February present strikingly different weather conditions. In September, temperatures range from a mild 2°C (36°F) at night to a warm 23°C (73°F) during the day, with an average of 13°C (56°F). The month experiences a considerable amount of rainfall, totaling 103 mm (4.1 in) over about 12 days, while humidity levels hover around 73%. In contrast, February showcases much colder temperatures, with nighttime lows plunging to -29°C (-20°F) and daytime highs reaching only 7°C (44°F), averaging -10°C (14°F). Precipitation is significantly lower at 40 mm (1.6 in) across 9 days, yet the humidity remains high at 93%. The stark difference in temperatures and conditions clearly illustrates the seasonal transition from late summer to deep winter. For more specific insights, check out Grand Marais weather in February.
In September, the weather is relatively mild, with temperatures ranging from a minimum of 2°C (36°F) to a maximum of 23°C (73°F) and an average of around 13°C (56°F). The month sees significant precipitation, with about 103 mm (4.1 in) of rain over 12 days, and humidity levels sitting at 73%. In contrast, March experiences much colder temperatures, with lows reaching -23°C (-10°F) and highs peaking at 8°C (47°F), averaging -4°C (26°F). The total precipitation for March is significantly lower at 42 mm (1.6 in) over just 6 days, but the humidity is higher at 89%. For more detailed insights, you can refer to Grand Marais weather in March.
September and April present distinctly different weather patterns. In September, temperatures range from a minimum of 2°C (36°F) to a maximum of 23°C (73°F), with an average temperature of 13°C (56°F). This month experiences relatively high precipitation levels of 103 mm (4.1 in) over approximately 12 days, and humidity sits at 73%. In contrast, April is cooler, with minimum temperatures plummeting to -11°C (12°F) and a maximum of 12°C (54°F), resulting in an average of just 1°C (34°F). The precipitation in April is lower at 67 mm (2.6 in) over 9 days, but the humidity is higher at 85%. For more detailed insights on April weather, you can visit Grand Marais weather in April.
In comparing the weather between September and May, we see distinct differences in temperature and precipitation patterns. September enjoys milder temperatures, with a minimum of 2°C (36°F) and an average of 13°C (56°F), reaching a maximum of 23°C (73°F). In contrast, May starts cooler with temperatures ranging from a minimum of -4°C (26°F) to a maximum of 17°C (63°F), averaging only 7°C (44°F). Precipitation levels are also notable, with September receiving 103 mm (4.1 in) over 12 days, while May sees less rainfall, totaling 67 mm (2.6 in) over 10 days. Despite the cooler May temperatures and slightly lower humidity at 76% compared to September's 73%, the latter generally feels more comfortable due to its warmer climate. For more detailed insights on May weather, visit Grand Marais weather in May.
September's weather is marked by slightly warmer temperatures compared to June, with average highs reaching 23°C (73°F) versus June's 21°C (71°F). While both months experience a comparable number of rainy days, September sees a higher total precipitation of 103 mm (4.1 in) compared to June's 69 mm (2.7 in). Additionally, September maintains a higher humidity level at 73%, whereas June has a slightly lower humidity of 71%. For more detailed insights into the conditions during June, you can explore Grand Marais weather in June.
When comparing the weather in September to that of July, notable differences emerge in both temperature and precipitation. In September, temperatures range from a minimum of 2°C (36°F) to a maximum of 23°C (73°F), with an average of 13°C (56°F). This contrasts with July, where temperatures are generally milder, ranging from 7°C (46°F) to 25°C (77°F) with an average of 16°C (60°F). Additionally, September experiences significantly more precipitation, totaling 103 mm (4.1 in) over 12 days, compared to July's 63 mm (2.5 in) over just 8 days. The humidity levels are somewhat similar, with September at 73% and July at 70%. For a closer look at July's climate specifics, you can visit Grand Marais weather in July.
In comparing the weather of September and August, September generally experiences a more significant chill with minimum temperatures dropping to 2°C (36°F) and an average of 13°C (56°F), while August maintains milder temperatures, with a minimum of 10°C (50°F) and an average of 17°C (62°F). The maximum temperatures in September reach 23°C (73°F), slightly lower than August’s peak of 25°C (77°F). Additionally, September sees increased rainfall, with 103 mm (4.1 in) spread over 12 days, compared to August's 78 mm (3.1 in) over just 10 days. Humidity levels are comparable, remaining at 73% in September and 71% in August. For a more in-depth look at August's weather, you can visit Grand Marais weather in August.
In September, temperatures are milder, ranging from a minimum of 2°C (36°F) to a maximum of 23°C (73°F), with an average of 13°C (56°F). The weather is relatively humid at 73%, accompanied by 103 mm (4.1 in) of precipitation over 12 days. In contrast, October sees a significant drop in temperatures, with minimums plummeting to -5°C (24°F) and an average of just 7°C (45°F). Although precipitation remains similar at 101 mm (4.0 in) over the same number of days, the humidity increases to 81%. For a detailed look at what to expect, check out Grand Marais weather in October.
September weather offers a mild transition into fall, with temperatures ranging from a low of 2°C (36°F) to a pleasant average of 13°C (56°F) and peak temperatures reaching 23°C (73°F). This month sees a fair amount of precipitation at 103 mm (4.1 in) over 12 days, with a humidity level of 73%. In contrast, November brings a stark change, plunging temperatures down to a minimum of -14°C (7°F) and an average of -1°C (31°F), with highs only hitting 13°C (55°F). Although it is drier, with 54 mm (2.1 in) of precipitation over 9 days, November's humidity rises to 87%. For more detailed insights, you can explore Grand Marais weather in November.
Comparing the weather in September and December reveals significant differences in temperature and conditions. September features a milder climate, with temperatures ranging from a minimum of 2°C (36°F) to a maximum of 23°C (73°F), along with an average of 13°C (56°F). This month typically experiences around 103 mm (4.1 in) of precipitation over 12 days, accompanied by a humidity level of 73%. In stark contrast, December sees much colder temperatures, with a minimum of -27°C (-16°F) and a maximum of 9°C (48°F), resulting in an average of -6°C (21°F). This winter month brings about 63 mm (2.5 in) of precipitation over 10 days, while humidity rises to 91%. For more detailed insights, you can visit Grand Marais weather in December.
As summer gracefully gives way to autumn, September in Grand Marais reveals a unique blend of lingering warmth and crispness. While the maximum temperatures remain comfortably mild, the cooler nights serve as a reminder that winter is just around the corner. This month experiences an uptick in precipitation, with increased humidity, hinting at the changing season’s character. Compared to the preceding months, September invites visitors to enjoy the gorgeous fall foliage while embracing the refreshing air. For a deeper look into how these changes shape the region, explore the full details at Grand Marais Climate.