September Weather in Mackinaw City, United States

Last updated: February 24, 2025

In September, Mackinaw City experiences a delightful blend of warmth and refreshing coolness. With maximum temperatures reaching up to 29°C (85°F) and an average of 16°C (61°F), the month offers a pleasant outdoor atmosphere perfect for exploration. However, temperatures can dip to a cooler 5°C (41°F), reminding visitors of the upcoming autumn. Rainfall is common, with 96 mm (3.8 in) of precipitation spread over approximately 11 days, contributing to a 79% humidity level that enhances the region's lush greenery. Embrace this transitional month, where summer's warmth gently gives way to the crispness of fall in this charming part of the United States.

September Temperature in Mackinaw City

September in Mackinaw City offers a delightful transition from summer warmth to the crispness of autumn. As temperatures dip gradually, the average temperature settles at a comfortable 16°C (61°F), making it an ideal time for outdoor activities. Minima hover around 5°C (41°F), while afternoon highs can reach a pleasant 29°C (85°F), providing a perfect blend of warmth and coolness. This month marks a significant shift from the sweltering summer months, with clear indications of cooling trends as fall approaches. The vibrant colors of autumn foliage become a stunning backdrop, enhancing the appeal of this picturesque location as visitors enjoy the last gasp of warmth before winter sets in.

September Weather in Mackinaw City: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Mackinaw City, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends.
JanFebMarAprMayJunJulAugSepOctNovDec222129385061686861503628
Data source: Temperature data for Mackinaw City 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 Mackinaw City

In September, Mackinaw City experiences a notable increase in precipitation, with an average of 96 mm (3.8 in) of rainfall over approximately 11 days. This marks a slight uptick from the preceding months, reflecting the transition toward the wetter fall season. As summer fades, the city's weather becomes more variable, with September standing out as a month where rainy days become more frequent compared to the drier summer months of July and August, both of which averaged just 9 days of rain. This trend suggests that residents and visitors should prepare for occasional showers, setting the stage for the more substantial rainfall typically observed in October, when average precipitation spikes to 138 mm (5.4 in).

September Precipitation Trends in Mackinaw City

The chart displays monthly precipitation patterns in Mackinaw City, 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.
JanFebMarAprMayJunJulAugSepOctNovDec50645794891008695971387477
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Mackinaw City

As September rolls in Mackinaw City, the humidity begins to rise slightly from the summer's steady lows, settling at 79%. This subtle increase signals the transition into autumn, where the crispness of early fall meets the lingering warmth of summer. Throughout the year, Mackinaw City experiences its highest humidity in the winter months, peaking at 92% in January and gradually decreasing until June, where it stabilizes around 75% during the warmest months. With September marking a shift back towards slightly higher humidity levels, it's a reminder of the summer's end and the cooler days to come, as moisture levels begin to rise again toward the 85% mark by October. The ebb and flow of humidity reflect the region's unique seasonal rhythms, creating a diverse and vibrant climate landscape.

September Average Humidity in Mackinaw City

This chart illustrates the average monthly humidity levels in Mackinaw City, 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.
JanFebMarAprMayJunJulAugSepOctNovDec92%91%87%86%79%75%75%75%79%85%88%89%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Mackinaw City

As September arrives in Mackinaw City, the UV Index begins to dip after the intense summer months, settling at 7, which falls into the high exposure category. This marks a transition from the blistering UV levels of 9 experienced in the heart of summer, where the burn time was a swift 15 minutes. With the arrival of autumn, residents and visitors can enjoy the outdoors with a slightly longer burn time of 25 minutes, while still staying vigilant about sun protection. It's a reminder that even as the temperatures cool, sun safety remains a priority. For more detailed insights on UV levels throughout the year, check out the Mackinaw City UV Index.

Maximum UV Index Levels in Mackinaw City for September

The chart shows the monthly maximum UV Index (UVI) for Mackinaw City 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.
JanFebMarAprMayJunJulAugSepOctNovDec245799987532
Data source: Mackinaw City 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 Mackinaw City

As summer transitions to fall, Mackinaw City basks in a delightful September sunshine, where the golden rays bathe the landscape for 275 hours this month. This marks a pleasant decline from the peak brightness of July, which boasts a robust 360 hours of sunshine, but still offers ample light compared to the drearier months ahead. The trend of decreasing sunlight continues as autumn takes hold, with October anticipated to see just 192 hours. This gradual shift invites residents and visitors alike to cherish the remaining warmth and outdoor adventures before the winter chill sets in, highlighting September as a beautiful bridge between the vibrancy of summer and the calm of autumn.

Monthly Sunshine Duration in Mackinaw City: September Highlighted

The September sunshine duration represents the total number of hours Mackinaw City 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.
JanFebMarAprMayJunJulAugSepOctNovDec87h136h228h239h304h331h360h332h275h192h121h99h
Data source: Mackinaw City September Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Mackinaw City During September

When it comes to the likelihood of sunny weather in September in Mackinaw City, the month stands out with a 51% chance of sunshine, making it one of the sunniest periods of the year. This marks a slight increase from August's 50%, indicating a consistent shift toward brighter days as summer transitions into fall. Notably, September's sun probability is higher than its preceeding months, such as June and July, which recorded 45% and 55% respectively. As autumn approaches, Mackinaw City's weather starts to balance, offering residents and visitors alike a refreshing blend of sunshine before the chill of winter sets in, enhancing the charm of this picturesque locale.

Percentage of Sunny Days in September in Mackinaw City

The chart illustrates the percentage of sunny days in Mackinaw City 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 Mackinaw City experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec13%19%39%34%49%45%55%50%51%34%30%16%
Data source: Mackinaw City September chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Mackinaw City in September

As summer fades into autumn, Mackinaw City experiences a noticeable shift in daylight duration. In September, the region enjoys approximately 12 hours of daylight, providing a gentle decline from the 14 hours seen in August. This gradual decrease marks the transition from the long, bright days of summer to the shorter, crisper days of fall. The daylight hours begin to decrease steadily as October approaches, with only 10 hours expected. Observing this trend, one can appreciate how the changing seasons subtly influence daily life in Mackinaw City, reminding us of nature's rhythmic cycle.

Average Daylight Hours in Mackinaw City for September

The chart illustrates the variation in daylight duration in Mackinaw City throughout the year, with September highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec9h 7m10h 22m11h 57m13h 34m14h 57m15h 38m15h 15m14h 1m12h 28m10h 52m9h 27m8h 43m
Data source: Mackinaw City daylight hours, calculated by summing the hours between sunrise and sunset for each day.

September Winds in Mackinaw City

In September, the winds in Mackinaw City begin to pick up slightly, with an average speed of 4.3 m/s (10 mph). This is a subtle increase compared to the calmer summer months of July and August, which recorded average speeds of 3.4 m/s (8 mph) and 3.7 m/s (8 mph), respectively. As the season transitions into fall, September's wind offers a refreshing breeze, hinting at the change in weather ahead. Notably, this month is sandwiched between the more blustery November, with its 5.2 m/s (12 mph) average, and the gradual tapering winds of August, showcasing the natural ebb and flow of Mackinaw City’s wind patterns throughout the year. As summer gives way to autumn, September's winds invite exploration and outdoor activities, making it a delightful time to experience the scenic beauty of this charming lakeside town.

Average September Wind Speed in Mackinaw City

The chart displays monthly wind speed patterns in Mackinaw City, 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.
JanFebMarAprMayJunJulAugSepOctNovDec4.24.75.24.74.14.03.43.74.3 m/s4.05.25.8
Data source: Mackinaw City September wind data, generated using information from the Copernicus Climate Change Service.

How September Weather in Mackinaw City Compares to Other Months

The weather in Mackinaw City 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 Mackinaw City and find detailed weather information for every month.

September and January present starkly contrasting weather conditions. In September, temperatures range from a minimum of 5°C (41°F) to a maximum of 29°C (85°F), with an average of 16°C (61°F). The month typically experiences 96 mm (3.8 in) of precipitation over 11 days and has a humidity level of 79%. On the other hand, January features a much colder climate, with temperatures plummeting to a minimum of -23°C (-9°F) and only reaching a maximum of 7°C (44°F), averaging -5°C (22°F). Although January has less precipitation at 50 mm (2.0 in) over 12 days, the humidity is higher at 92%. For a detailed look at January weather specifics, check out Mackinaw City weather in January.

September and February present starkly contrasting weather conditions. In September, the temperatures range from a mild 5°C (41°F) at night to a warm 29°C (85°F) during the day, with an average of 16°C (61°F). This month experiences 96 mm (3.8 in) of precipitation over 11 days and a humidity level of 79%, contributing to a relatively comfortable climate. In contrast, February is markedly colder, with temperatures plummeting to a minimum of -20°C (-4°F) and reaching a maximum of 8°C (47°F), averaging -6°C (22°F). Despite receiving less rainfall, 64 mm (2.5 in) over 13 days, February's higher humidity at 91% can make the chilly air feel even more biting. For a more detailed look at what February brings, check out Mackinaw City weather in February.

In comparing the weather between September and March, we see stark contrasts in temperature and conditions. September enjoys milder temperatures, ranging from a minimum of 5°C (41°F) to a pleasant maximum of 29°C (85°F), accompanied by a relatively high humidity of 79% and 96 mm of precipitation over 11 days. In contrast, March presents a much colder landscape, with temperatures plummeting to a minimum of -18°C (0°F) and averaging -2°C (29°F) despite reaching a maximum of 16°C (61°F). Precipitation is lower in March at 57 mm (2.3 in) over 9 days, but the humidity is slightly higher at 87%. For a closer look at March weather specifics, you can explore Mackinaw City weather in March.

In comparing the weather of September and April, we see notable differences in temperature and conditions. September boasts a milder climate with average temperatures ranging from a minimum of 5°C (41°F) to a maximum of 29°C (85°F), making it a warmer month overall with an average of 16°C (61°F). In contrast, April experiences much cooler temperatures, with a minimum dip to -9°C (16°F) and a maximum of 18°C (65°F), leading to an average of just 3°C (38°F). Precipitation levels are relatively similar, with September receiving 96 mm (3.8 in) across 11 days, while April sees 94 mm (3.7 in) over 13 days, indicating that both months can be quite wet. Additionally, humidity is slightly higher in April at 85%, compared to 79% in September. For more detailed information, you can check out Mackinaw City weather in April.

September and May exhibit distinct weather characteristics despite having similar humidity levels of 79%. In September, temperatures range from a minimum of 5°C (41°F) to a maximum of 29°C (85°F), with an average of 16°C (61°F). The month experiences slightly more precipitation, totaling 96 mm (3.8 in) over 11 days. Conversely, May has cooler temperatures, with a minimum of -2°C (28°F) and a maximum of 27°C (80°F), averaging at 10°C (50°F). With 89 mm (3.5 in) of rain over 10 days, May is slightly drier than September. For more detailed information, you can explore Mackinaw City weather in May.

In comparing the weather of September and June, both months showcase similar average temperatures, hovering around 16°C (61°F). June tends to have slightly higher maximum temperatures, reaching up to 30°C (86°F), while September can peak at 29°C (85°F). Both months experience considerable precipitation, with September receiving 96 mm (3.8 in) over 11 days and June slightly more at 100 mm (4.0 in) across 10 days. Interestingly, June has a lower humidity level at 75% compared to September's 79%, making June feel a bit less muggy despite the similar temperatures. For more detailed information, you can check out the Mackinaw City weather in June.

September weather tends to be cooler than July, with a minimum temperature of 5°C (41°F) compared to July's 10°C (50°F). The average temperature in September is 16°C (61°F), while in July it's warmer at 20°C (69°F). July also boasts slightly higher maximum temperatures, reaching up to 31°C (88°F) versus September's 29°C (85°F). Precipitation is more frequent in September, with 96 mm (3.8 in) over 11 days, compared to July's 86 mm (3.4 in) over 9 days. Additionally, humidity is marginally higher in September at 79%, compared to 75% in July. For more detailed information on July weather, check out Mackinaw City weather in July.

In comparing the weather of September and August, we see clear distinctions between the two months. September experiences slightly cooler temperatures, with an average of 16°C (61°F) compared to August's 20°C (68°F). The maximum temperature in September reaches 29°C (85°F), which is just 2°C (4°F) lower than August's peak of 31°C (87°F). Both months have comparable precipitation, with September receiving 96 mm (3.8 in) over 11 days, while August sees 95 mm (3.7 in) across 9 days. Humidity levels are higher in September at 79%, compared to 75% in August. For more detailed weather information for August, you can visit Mackinaw City weather in August.

In September, the weather is typically milder, with temperatures ranging from a minimum of 5°C (41°F) to a maximum of 29°C (85°F) and an average of 16°C (61°F). However, September also brings a fair amount of rainfall, with 96 mm (3.8 in) of precipitation over approximately 11 days and a humidity level of 79%. In contrast, October experiences cooler temperatures, with a minimum of -3°C (26°F) and an average of 10°C (50°F). Although the maximum temperature is relatively mild at 24°C (76°F), October sees an increase in precipitation, with 138 mm (5.4 in) spread over 17 days and a slightly higher humidity of 85%. For more detailed information, you can check Mackinaw City weather in October.

In September, the weather is relatively mild, with temperatures ranging from a minimum of 5°C (41°F) to a maximum of 29°C (85°F), averaging around 16°C (61°F). The month experiences a fair amount of rainfall, with 96 mm (3.8 inches) spread over 11 days, and the humidity is a comfortable 79%. In contrast, November brings a significant drop in temperatures, with a minimum of -12°C (11°F), an average of 2°C (37°F), and a maximum of 21°C (71°F). While it has slightly less precipitation at 74 mm (2.9 inches) over 14 days, the humidity rises to 88%, contributing to a much colder and damp atmosphere. For more details, you can check out Mackinaw City weather in November.

In September, the weather is typically mild, with temperatures ranging from a minimum of 5°C (41°F) to a maximum of 29°C (85°F), resulting in an average of 16°C (61°F). This month sees relatively high humidity at 79% and experiences about 96 mm (3.8 in) of precipitation over 11 days. In contrast, December brings a significant drop in temperature, with a minimum of -19°C (-1°F) and a maximum of 13°C (56°F), averaging around -2°C (29°F). While December has slightly less precipitation (77 mm or 3.0 in) over more days (15), the humidity rises to 89%, contributing to the winter chill. For more detailed insights into December weather specifically, you can visit Mackinaw City weather in December.

Compare Mackinaw City's Climate with Cities Worldwide

Conclusion: What to Expect From September Weather in Mackinaw City

As summer transitions into fall, September in Mackinaw City showcases a delightful shift in weather that sets it apart from the sweltering summer months. With temperatures averaging a mild 16°C, days can still warm up to a pleasant 29°C, inviting outdoor adventures amidst the stunning autumn foliage. However, this month also sees an increase in rainfall, with approximately 11 days experiencing precipitation, contributing to a humidity level of 79%. This blend of mild warmth and refreshing rains creates a unique atmosphere, perfect for enjoying the beauty of the season. For more detailed information on what to expect throughout the year, check out Mackinaw City Climate.