September Weather in Petoskey, United States

Last updated: February 24, 2025

In September, Petoskey, United States, experiences a mild climate with temperatures ranging from a pleasant maximum of 28°C (82°F) to a cooler minimum of 5°C (41°F). The average temperature hovers around 16°C (62°F), making it a comfortable time to enjoy outdoor activities. However, expect frequent rain, with 90 mm (3.5 in) of precipitation spread over 12 days, contributing to the region's lush landscapes. With humidity levels reaching 79%, the air carries a refreshing crispness, often heralding the arrival of autumn. Whether you're strolling through vibrant fall foliage or exploring local attractions, September in Petoskey offers a delightful experience infused with seasonal charm.

September Temperature in Petoskey

In September, Petoskey experiences a delightful transition from the warmth of summer to the crispness of autumn. With minimum temperatures averaging around 5°C (41°F) and a comfortable average of 16°C (62°F), days still invite outdoor activities, while evenings begin to hint at the cooler months ahead. The maximum temperatures can reach up to 28°C (82°F), maintaining the lingering warmth that characterizes late summer. This month showcases a gradual cooling trend as it follows the hotter months of July and August, making it a perfect time for enjoying the stunning fall foliage without the heat of summer, signaling nature's colorful transformation.

September Weather in Petoskey: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Petoskey, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends.
JanFebMarAprMayJunJulAugSepOctNovDec232330394960686861503729
Data source: Temperature data for Petoskey generated using information from the Copernicus Climate Change Service.
Choose your preferred temperature unit
The average of daily temperatures (24 hours) calculated across all days in the month.

September Precipitation in Petoskey

In September, Petoskey experiences a notable shift in precipitation patterns, receiving 90 mm (3.5 in) of rain over 12 days, which aligns closely with the wetter conditions seen in the months preceding it. This amount is a slight decline from August's 97 mm, yet maintains the city's consistent pattern of moderate rainfall that stretches from late spring through early fall. After a drier July, September marks a return to regular precipitation, paving the way for the even heavier rains of October. Overall, as summer wanes, the gradual uptick in precipitation sets the stage for the vibrant transformations of autumn.

September Precipitation Trends in Petoskey

The chart displays monthly precipitation patterns in Petoskey, 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.
JanFebMarAprMayJunJulAugSepOctNovDec657663991081038997901599792
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

September Humidity in Petoskey

In September, Petoskey experiences a moderate humidity level of 79%, which is a slight increase from the drier months of July and August. This uptick marks a transition from the warmth of summer to the cooler embrace of fall, reflecting a gradual return to higher moisture levels typical of the region as the year progresses. The humidity trend, beginning at a high of 91% in January and decreasing consistently through summer, demonstrates how the outdoor air becomes crisper as autumn arrives. As the month draws to a close, humidity levels will start to rise again, hinting at the cozy, damp days of October ahead.

September Average Humidity in Petoskey

This chart illustrates the average monthly humidity levels in Petoskey, 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.
JanFebMarAprMayJunJulAugSepOctNovDec91%91%87%87%82%79%76%76%79%83%86%87%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Petoskey

As summer gives way to autumn in Petoskey, September sees a moderate decline in the UV Index, settling at 7—a level categorized as high. This marks a slight drop from the peak summer months, where the UV Index consistently reached a very high 9. With a burn time of 25 minutes, it’s essential to remain cautious while enjoying the outdoors. Notably, September retains enough intensity to require protective measures, especially considering the high exposure levels from previous months. Embrace the beautiful transition of the season while staying aware of the sun's strength by checking the Petoskey UV Index regularly for updated information.

Maximum UV Index Levels in Petoskey for September

The chart shows the monthly maximum UV Index (UVI) for Petoskey 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: Petoskey 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 Petoskey

As summer transitions to autumn, September in Petoskey invites a gentle embrace of warmth and light, boasting 279 hours of sunshine. This month marks a notable pause from the intense summer radiance, with July and August each dazzling with 363 and 336 hours respectively. September's hours still reflect a generous glow compared to the chillier days ahead, as it steps down from the peak brightness found during the summer. In contrast to October's 195 hours, September serves as a reminder of summer's final cheer, offering residents and visitors alike a splendid opportunity to savor the shifting scenery bathed in golden sunlight before the retreat of winter's chill.

Monthly Sunshine Duration in Petoskey: September Highlighted

The September sunshine duration represents the total number of hours Petoskey 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.
JanFebMarAprMayJunJulAugSepOctNovDec83h140h228h243h305h335h363h336h279h195h127h99h
Data source: Petoskey September Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Petoskey During September

In Petoskey, United States, the month of September brings a notable shift in weather, with a 52% chance of sunny days, aligning it with the peak summer months of July and August. This consistent likelihood of sunshine indicates that the transition to fall does not drastically diminish the warm and bright days residents and visitors have grown accustomed to during the summer. Following a peak in June and July at 52%, September maintains this sunny momentum before the autumn chill begins to set in. As daylight hours start to shorten, take advantage of September's favorable weather, which provides a perfect backdrop for outdoor activities, enjoying the vibrant fall scenery, and soaking up the last rays of summer sun.

Percentage of Sunny Days in September in Petoskey

The chart illustrates the percentage of sunny days in Petoskey 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 Petoskey experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec9%19%40%36%49%44%52%52%52%34%28%14%
Data source: Petoskey September chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Petoskey in September

As summer wanes in Petoskey, September ushers in a subtle transition with an average daylight duration of 12 hours. This marks a gentle decline from the sun-drenched days of June and July, where residents enjoyed 15 hours of daylight. As the month progresses, the lengthening shadows remind us of the approaching autumn, but the shift isn't drastic; it’s a soft landing from the vibrant summer to the crisp fall. Following September, the daylight continues to dwindle, sliding down to 10 hours in October and 9 hours in November, highlighting a clear trend of decreasing daylight as the year draws to a close. This gradual reduction invites Petoskey's community to savor the remaining light, celebrating the beauty of early autumn while preparing for the coziness of shorter days ahead.

Average Daylight Hours in Petoskey for September

The chart illustrates the variation in daylight duration in Petoskey throughout the year, with September highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec9h 10m10h 24m11h 57m13h 33m14h 54m15h 35m15h 12m13h 59m12h 28m10h 53m9h 29m8h 46m
Data source: Petoskey daylight hours, calculated by summing the hours between sunrise and sunset for each day.

September Winds in Petoskey

As summer gives way to autumn, September in Petoskey brings a refreshing resurgence in wind speed, averaging 4.6 m/s (10 mph), effectively mirroring the conditions seen in the chillier months of January and April. The winds pick up slightly from the languid summer breeze, which hovers around 3.5 to 3.8 m/s (8-9 mph) in July and August. This shift marks a transition, setting the stage for the more robust winds that follow in October and November. Interestingly, while September's winds reintroduce a hint of vigor to the air, they also complement the stunning fall foliage, making the already picturesque scenery of Petoskey even more captivating. As the seasons change, so too does the gentle caress of the wind, inviting both locals and visitors to embrace the beauty of autumn.

Average September Wind Speed in Petoskey

The chart displays monthly wind speed patterns in Petoskey, 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.
JanFebMarAprMayJunJulAugSepOctNovDec4.65.05.54.64.13.83.53.64.6 m/s4.15.56.1
Data source: Petoskey September wind data, generated using information from the Copernicus Climate Change Service.

How September Weather in Petoskey Compares to Other Months

The weather in Petoskey 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 Petoskey and find detailed weather information for every month.

September and January present starkly contrasting weather experiences. In September, temperatures range from a pleasant 5°C (41°F) to a warm 28°C (82°F), with an average of 16°C (62°F). The month typically sees 90 mm (3.5 in) of precipitation over 12 days, accompanied by a relatively high humidity of 79%. In contrast, January plunges into the cold, with temperatures ranging from a frigid -20°C (-4°F) to a maximum of 8°C (47°F), averaging -5°C (23°F). The colder month has less precipitation at 65 mm (2.6 in) but spans 14 days of rain or snow, and an even higher humidity level of 91%. For more detailed information, check out Petoskey weather in January.

September and February present stark contrasts in weather conditions. In September, temperatures range from a pleasant 5°C (41°F) at night to a warm 28°C (82°F) during the day, with an average of 16°C (62°F). The month sees 90 mm (3.5 in) of precipitation, spread over approximately 12 days, and a relative humidity of 79%. In contrast, February is much colder, with temperatures plunging to a minimum of -18°C (1°F) and averaging -5°C (23°F), reaching a maximum of only 10°C (51°F). Precipitation in February totals 76 mm (3.0 in) over 16 days, accompanied by higher humidity levels at 91%. For a detailed overview of February weather, you can check Petoskey weather in February.

September and March present stark contrasts in weather patterns. In September, temperatures range from a mild 5°C (41°F) to a warm 28°C (82°F), with an average of 16°C (62°F), while precipitation measures around 90 mm (3.5 in) over 12 days, resulting in a humidity level of 79%. Conversely, March experiences a much cooler climate, with temperatures dropping as low as -17°C (2°F) and peaking at only 17°C (63°F), averaging -1°C (30°F). The month sees about 63 mm (2.5 in) of precipitation, also over 12 days, but with a slightly higher humidity of 87%. For more detailed insights, you can explore Petoskey weather in March.

In comparing the weather between September and April, September typically showcases milder temperatures with a minimum of 5°C (41°F) and an average of 16°C (62°F), peaking at 28°C (82°F). In contrast, April experiences cooler conditions, recording a minimum of -9°C (16°F) and an average of just 4°C (39°F), while reaching a maximum of 20°C (68°F). Additionally, both months have significant precipitation, with September receiving 90 mm (3.5 in) over 12 days and April slightly higher at 99 mm (3.9 in) across 14 days. Humidity levels are also notable; September has 79% while April's is slightly higher at 87%. For more details, check out Petoskey weather in April.

When comparing the weather in September and May, it’s clear that both months exhibit a range of temperatures but differ significantly in their averages. September typically enjoys milder conditions, with average temperatures around 16°C (62°F) and a maximum of 28°C (82°F), while May tends to be cooler, averaging 10°C (49°F). Rainfall is another key difference; September sees about 90 mm (3.5 in) of precipitation over 12 days, whereas May experiences slightly higher precipitation at 108 mm (4.3 in) over 11 days. Both months are characterized by relatively high humidity, with September at 79% and May at 82%. For more details about May weather, check out Petoskey weather in May.

When comparing the weather in September and June, we notice some similarities and slight variations. Both months feature an average temperature of 16°C (60°F), with maximum temperatures peaking at 28°C (82°F). However, September experiences a slightly higher minimum temperature of 5°C (41°F) compared to June's 4°C (39°F). In terms of precipitation, June sees a bit more rain, with 103 mm (4.1 in) over 12 days, while September has 90 mm (3.5 in) across the same number of days. Humidity levels remain consistent at 79% in both months, creating a similar feel to the air. For more details on the weather specifics in June, you can check this link: Petoskey weather in June.

In comparing the weather between September and July, September exhibits a wider temperature range, with minimums dropping to 5°C (41°F) and reaching a maximum of 28°C (82°F), while July consistently stays warmer, with minimums around 12°C (53°F) and maximums peaking at 29°C (84°F). Although both months have similar overall precipitation levels—89 mm (3.5 in) in July and 90 mm (3.5 in) in September—September experiences rain over a slightly longer duration of 12 days compared to 9 days in July. Additionally, September's humidity is slightly higher at 79%, compared to July's 75%. For more detailed insights on July weather, you can view Petoskey weather in July.

In comparing the weather of September and August, September sees a notable drop in minimum temperatures, averaging around 5°C (41°F), while August maintains a milder minimum of 10°C (50°F). Both months experience maximum temperatures that peak at 28°C (82°F) and 28°C (83°F) respectively, indicating a similar warm finish to summer. However, September brings more humidity at 79%, compared to August's 76%. Precipitation levels are also slightly higher in September, with 90 mm (3.5 in) over 12 days, compared to August's 97 mm (3.8 in) over 10 days. For those interested in August's weather specifics, further details can be found here.

September and October weather exhibit notable contrasts. In September, temperatures range from a mild 5°C (41°F) at night to a warm 28°C (82°F) during the day, with an average of 16°C (62°F). The month sees moderate precipitation of 90 mm (3.5 in) over 12 days, accompanied by a humidity level of 79%. Conversely, October ushers in cooler temperatures, with nighttime lows plummeting to -1°C (30°F) and daytime highs reaching 24°C (75°F), resulting in a lower average of 10°C (50°F). Rainfall increases significantly to 159 mm (6.3 in) spread across 18 days, while humidity rises slightly to 83%. For more detailed insights, check out Petoskey 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 28°C (82°F), and an average temperature of 16°C (62°F). The month sees about 90 mm (3.5 in) of precipitation spread over 12 days and a humidity level of 79%. In contrast, November experiences much colder temperatures, with a minimum of -13°C (10°F) and an average of just 3°C (37°F), while the maximum temperature reaches 21°C (70°F). Precipitation increases slightly to 97 mm (3.8 in), occurring over 18 days, and the humidity rises to 86%. For more detailed insights into November's weather, you can check Petoskey weather in November.

September and December weather exhibit stark contrasts, reflecting the transition from late summer warmth to winter chill. In September, temperatures range from a mild 5°C (41°F) at the minimum to a warm 28°C (82°F) at their peak, with an average of 16°C (62°F). The month sees around 90 mm (3.5 in) of precipitation over approximately 12 rainy days and maintains a comfortable humidity level of 79%.

In contrast, December plunges into the cold, with minimum temperatures dropping to a frigid -17°C (2°F) and averaging around -2°C (29°F). The maximum temperature reaches only 14°C (57°F), with precipitation slightly higher at 91 mm (3.6 in), typically spread across 17 days. December's humidity also climbs to 87%, contributing to the overall chilly atmosphere. For more details on the weather during this month, you can check out Petoskey weather in December.

Compare Petoskey's Climate with Cities Worldwide

Conclusion: What to Expect From September Weather in Petoskey

As September rolls into Petoskey, the weather transforms into a delightful mix of mild warmth and refreshing coolness. This month typically showcases a more temperate climate, with comfortable daytime highs that invite outdoor activities while the cooler nights hint at the impending fall. The increased humidity and occasional rainfall bring a lush vibrancy to the landscape, distinguishing it from the drier summer months. With an average of 12 wet days throughout the month, September sets the stage for a picturesque autumn, making it a perfect time to explore the area's natural beauty. For a more in-depth view of what to expect, check out Petoskey Climate.