Last updated: February 24, 2025
In September, Sturgeon Bay experiences a delightful transition from summer to fall, characterized by a maximum temperature of 29°C (85°F) and an average of 17°C (63°F). With nighttime temperatures dipping to a refreshing 5°C (41°F), this month offers a variety of climate experiences. Visitors can expect 66 mm (2.6 in) of rain over approximately 10 days, contributing to the region's 78% humidity. Overall, September in Sturgeon Bay is a vibrant blend of warmth and refreshing coolness, making it an ideal time for outdoor activities and enjoying the stunning fall foliage.
September in Sturgeon Bay offers a delightful transition from the warmth of summer to the crispness of fall. With minimum temperatures averaging around 5°C (41°F) and reaching up to a pleasant 29°C (85°F), the month showcases a comfortable average of 17°C (63°F), inviting residents and visitors alike to enjoy outdoor activities. Unlike the preceding months of sweltering heat in July and August, September brings a refreshing coolness, making it ideal for exploring the scenic beauty of the area. As the fleeting warmth lingers, the gradual drop in temperatures signals the approach of autumn, setting the stage for vibrant foliage and cozy gatherings.
September in Sturgeon Bay typically sees 66 mm (2.6 in) of precipitation over 10 days, marking a noticeable dip from the summer months. As the region transitions into autumn, this reduction in rainfall complements the gradual cooling temperatures, creating a refreshing atmosphere. Following the wetter months of June and August, where precipitation peaked at 101 mm (4.0 in) and 96 mm (3.8 in) respectively, September's moderate rainfall signals a shift, aligning with a less humid climate. This month effectively bridges the lushness of summer with the crispness of fall, as the early hint of changing seasons begins to paint the landscape in vibrant hues.
In September, Sturgeon Bay experiences a notable rise in humidity, reaching 78%, after the drier summer months. This increase suggests a shift as the warm weather gives way to the crispness of autumn. The trend highlights a significant decrease from the summer peak, with July and August recording the lowest humidity levels at 74% and 73% respectively. As the year progresses into October, humidity levels are expected to climb further, reminiscent of the previous autumn's patterns, which often see moisture levels returning to 84%. Overall, September marks a transitional phase, bridging the dry warmth of summer with the wetter conditions that characterize the fall months.
As summer transitions into fall in Sturgeon Bay, the UV Index shows a notable shift in September, dropping to 7, which falls into the high exposure category. This marks a change from the intense very high levels experienced in the peak months of May through August, where burn times were only 15 minutes. In September, residents and visitors can enjoy 25 minutes of sun exposure before risking a burn, reminding us that while the days are still warm, the sun's intensity is gradually reducing. As daylight wanes, it's important to stay informed about UV levels, especially with the changing seasons. For more details on UV levels throughout the year, check out the full report on Sturgeon Bay UV Index.
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As summer transitions into autumn, September in Sturgeon Bay remains a vibrant chapter of sunshine, boasting 278 hours of sunlight. This month experiences a notable reduction in daylight compared to the sun-drenched peak of July, which records a whopping 368 hours. Yet, September still shines brighter than the earlier months of the year, presenting a delightful blend of warmth and comfort as the days grow shorter. Following the warm embrace of August with 336 hours, September's light serves as a gentle reminder of summer's lingering presence, while paving the way for the cozy autumnal months ahead. The steady decline from late summer peaks reflects the natural rhythm of the seasons, inviting residents and visitors alike to savor the last glimmers of sunshine before the chill of October settles in.
September in Sturgeon Bay offers a promising 55% chance of sunny weather, marking a delightful transition as summer gradually gives way to autumn. This month continues the trend of increased sunshine, with percentages peaking in the warmer months—58% in July and 56% in August—before starting to dip again in October. As days begin to shorten, September remains a beautiful time to enjoy the lingering warmth and radiant skies, making it a wonderful opportunity for outdoor activities and scenic explorations. With the end of summer approaching, this month stands out as one last chance to bask in the sun before autumn sets in.
As summer transitions into fall, September in Sturgeon Bay experiences a gentle decline in daylight, with approximately 12 hours of sunshine to enjoy. This month serves as a bridge between the long, bright days of summer—where sunlight peaked at 15 hours in June and July—and the shorter days that follow in October. While the daylight hours are still ample for outdoor activities, they begin to signal the onset of autumn, reminiscent of nature's shifting palette. The gradual decrease in sunlight from the 14 hours in May to 12 hours in September indicates a steady progression toward the cozier months ahead, inviting a reflective pause as the vibrant energy of summer fades.
In September, Sturgeon Bay experiences a gentle breeze with an average wind speed of 4.4 m/s (10 mph), marking a slight uptick from the summer months. This increase signals a transition as the region begins to prepare for the crispness of autumn. Compared to the quieter winds of July and August, where speeds dipped to 3.6 m/s (8 mph) and 3.7 m/s (8 mph) respectively, September's conditions bring a refreshing change. Interestingly, this month's winds are just below the spring averages, indicating a harmonious balance between the lingering warmth of summer and the impending chill of fall. As the leaves begin to change, the September winds serve as a reminder of the seasonal shift and the beauty that comes with it.
The weather in Sturgeon 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 Sturgeon Bay and find detailed weather information for every month.
Comparing the weather in September and January reveals stark contrasts. September boasts a mild average temperature of 17°C (63°F), with maximum highs reaching up to 29°C (85°F), making it a pleasant time for outdoor activities. Although September experiences more rainfall, with 66 mm (2.6 in) over about 10 days, the humidity levels hover around a comfortable 78%. In contrast, January presents a chilling environment, characterized by an average temperature of -5°C (23°F) and maximums that only hit 7°C (45°F). The precipitation is lower at 42 mm (1.6 in) over just 7 days, but the humidity is slightly higher at 89%, contributing to the icy conditions. For more specific insights into January's weather, you can check Sturgeon Bay weather in January.
September and February present starkly contrasting weather patterns. September boasts a mild climate with temperatures ranging from a cool 5°C (41°F) to a warm 29°C (85°F) and an average of 17°C (63°F). The month experiences relatively high humidity at 78% and receives 66 mm (2.6 in) of precipitation over 10 days. In contrast, February brings frigid temperatures, with a chilling minimum of -28°C (-18°F) and a maximum of just 12°C (54°F), averaging -5°C (22°F). This winter month is characterized by even higher humidity at 90%, yet it records slightly less precipitation at 50 mm (2.0 in) over the same 10 days. For more specific details about the weather during this cold month, visit Sturgeon Bay weather in February.
In September, the weather is notably warmer with temperatures ranging from a minimum of 5°C (41°F) to a maximum of 29°C (85°F), and an average of 17°C (63°F). This month experiences relatively high humidity at 78% and receives about 66 mm (2.6 in) of precipitation over approximately 10 days. In contrast, March is much colder, featuring a temperature range from -21°C (-5°F) to a maximum of 13°C (56°F), with an average of 0°C (32°F). The month sees slightly lower precipitation levels at 58 mm (2.3 in) over 8 days, but the humidity is higher at 87%. For more detailed information about March weather, you can check Sturgeon Bay weather in March.
When comparing the weather in September and April, distinct differences emerge. In September, temperatures generally range from a minimum of 5°C (41°F) to a pleasant average of 17°C (63°F), peaking at a warm 29°C (85°F). In contrast, April is cooler, with temperatures starting as low as -9°C (15°F) and peaking at a maximum of 19°C (66°F), resulting in a much lower average temperature of 5°C (41°F). Additionally, April experiences more precipitation, with 92 mm (3.6 in) over 12 days, compared to September's 66 mm (2.6 in) over 10 days. Humidity levels are also slightly higher in April at 84% versus 78% in September. For more detailed information on weather patterns, you can explore Sturgeon Bay weather in April.
In September, temperatures range from a cool 5°C (41°F) to a warm 29°C (85°F), averaging around 17°C (63°F), while May experiences slightly cooler temperatures ranging from 0°C (32°F) to a maximum of 25°C (77°F), with an average of 11°C (53°F). September sees less precipitation with 66 mm (2.6 in) over approximately 10 days, compared to May's 95 mm (3.8 in) over 11 days. Humidity levels are quite similar in both months, with September at 78% and May slightly lower at 77%. For more details on May weather, check out Sturgeon Bay weather in May.
When comparing the weather in September and June, we see some notable differences despite their similar maximum temperatures of 29°C (85°F). September experiences a temperature range from a cooler minimum of 5°C (41°F) to an average of 17°C (63°F), while June's temperatures start slightly higher with a minimum of 7°C (45°F) and an average of 18°C (64°F). In terms of precipitation, June is wetter with 101 mm (4.0 in) falling over 12 days compared to September's 66 mm (2.6 in) over 10 days. Furthermore, September has a bit more humidity at 78% compared to June's 75%. For more detailed information, check out Sturgeon Bay weather in June.
September weather is generally cooler than July, with temperatures ranging from a minimum of 5°C (41°F) to a maximum of 29°C (85°F) and an average of 17°C (63°F). In contrast, July boasts warmer temperatures, starting at a minimum of 13°C (57°F), peaking at 31°C (89°F), and averaging 22°C (72°F). While September experiences around 66 mm (2.6 in) of precipitation over 10 days, July sees slightly more rain at 90 mm (3.6 in) across 11 days. Humidity in September is higher at 78%, compared to July's 74%. For a closer look at July's weather specifics, visit Sturgeon Bay weather in July.
When comparing the weather in September to August, we see a notable shift in temperatures and precipitation patterns. September experiences cooler temperatures, with a minimum of 5°C (41°F) and an average of 17°C (63°F), whereas August enjoys milder conditions with a minimum of 12°C (53°F) and an average of 21°C (70°F). Both months share the same maximum temperature of 29°C (85°F), but September tends to have higher humidity at 78% compared to August's 73%. In terms of rainfall, September has 66 mm (2.6 in) of precipitation over 10 days, which is slightly less than August's 96 mm (3.8 in) recorded over the same number of days. For a more detailed look, check out Sturgeon Bay weather in August.
September typically showcases warmer weather, with average temperatures around 17°C (63°F) and highs reaching up to 29°C (85°F). In contrast, October sees a significant drop in temperatures, averaging only 11°C (51°F) and peaking at 23°C (74°F). While September experiences about 66 mm (2.6 in) of precipitation over 10 days, October is wetter, with 99 mm (3.9 in) of rainfall across 12 days. The humidity levels also rise slightly from September's 78% to October's 84%, making the air feel a bit more damp. For more detailed insights, check out Sturgeon Bay weather in October.
September and November present a stark contrast in weather conditions. In September, 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 17°C (63°F). This month experiences around 66 mm (2.6 in) of precipitation over approximately 10 days, coupled with a humidity level of 78%. In contrast, November sees much colder temperatures, with a minimum of -10°C (14°F), an average of 3°C (37°F), and a maximum of 19°C (67°F). The month has lower precipitation levels at 53 mm (2.1 in) over about 7 days, but a higher humidity of 89%. For more details on November weather, visit Sturgeon Bay weather in November.
September and December present stark contrasts in weather conditions. September boasts a milder climate with temperatures ranging from a minimum of 5°C (41°F) to a maximum of 29°C (85°F), accompanied by an average of 17°C (63°F). This month experiences about 66 mm (2.6 in) of precipitation over 10 days, and humidity levels sit at 78%. In contrast, December brings frigid temperatures, with lows plummeting to -23°C (-9°F) and a maximum of only 15°C (59°F), averaging at -2°C (29°F). Precipitation in December is slightly lower at 56 mm (2.2 in) over 8 days, and humidity levels rise to 87%. For more details on December weather conditions, check out Sturgeon Bay weather in December.
September in Sturgeon Bay heralds the transition from summer warmth to the crispness of autumn, making it a unique month in the weather calendar. With temperatures often reaching pleasantly warm highs while also dipping noticeably at night, this month strikes a captivating balance. Unlike the peak summer months, September brings increased humidity and the potential for light rain, appearing on about a third of the days. The overall atmosphere shifts, inviting those who appreciate a mix of sun and cool breezes to enjoy the scenic beauty of the area. If you're keen to understand more about the weather patterns throughout the year, be sure to explore Sturgeon Bay Climate.