Last updated: February 24, 2025
In September, Wisconsin Dells experiences a delightful transition into autumn, characterized by a maximum temperature reaching up to 33°C (92°F) and an average of 18°C (64°F). The evenings can turn cooler, with lows dipping to 2°C (36°F). This month also brings about 98 mm (3.9 in) of rainfall, spread over 10 days, contributing to the region's lush scenery. Combined with a humidity level of 79%, September in Wisconsin Dells offers a refreshing yet warm atmosphere, perfect for outdoor activities amidst the vibrant foliage.
In September, Wisconsin Dells experiences a delightful transition into autumn, with temperatures significantly milder compared to the preceding summer months. The average temperature sits comfortably at 18°C (64°F), while daytime highs can reach up to 33°C (92°F), offering lingering warmth reminiscent of summer. As nights cool down, the temperature dips to a chilly minimum of 2°C (36°F), signaling the change of season. This month strikes a perfect balance, allowing visitors to enjoy outdoor activities amidst vibrant fall foliage, as the region begins to showcase its stunning autumn colors while still holding onto the last whispers of summer warmth.
In September, Wisconsin Dells experiences a slight dip in precipitation compared to the summer months, with an average of 98 mm (3.9 in) spread over 10 days. This reflects a transition from the humid warmth of summer, as rainfall begins to moderate after the wetter months of May and August, which recorded 126 mm and 110 mm, respectively. As fall approaches, not only does the volume of rain decrease but so does the frequency of precipitation days, showing a trend toward drier conditions that typically characterize the upcoming autumn. Overall, September serves as a bridge, marking the end of the lush summer landscape while also hinting at the crisp days ahead.
As September arrives in Wisconsin Dells, the air begins to shift with a recorded humidity of 79%. This marks a subtle rise from the drier summer months of July and August, where humidity levels dipped to 78% and 76%, respectively. Interestingly, this slight uptick contrasts with the higher humidity levels experienced earlier in the year, particularly the steady 85% from January through April. The transition into fall sees humidity increase again, hinting at the cooler, more moisture-laden months ahead, as October's humidity forecast rises to 83%. Overall, September serves as a bridge, balancing the tail end of summer's warm embrace and the crisp onset of autumn, making it a uniquely transitional month in this picturesque locale.
As summer wanes in September, Wisconsin Dells experiences a notable decrease in the UV Index, which drops to 7—a shift from the intense levels of the preceding months. This corresponds to a high exposure category, suggesting that while the sun is still strong, the risk of harm from unprotected sun exposure is less critical than the peak summer months. With a burn time of 25 minutes, outdoor enthusiasts should remain cautious and consider protective measures like sunscreen or hats. This trend emphasizes the importance of vigilance as we transition into fall. For detailed insights on UV exposure in this region year-round, visit Wisconsin Dells UV Index.
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As summer gently fades into fall, September in Wisconsin Dells shines with a generous 263 hours of sunshine, reflecting a seamless transition from the bustling warmth of July and August. This month, while still bright, sees a slight dip from the peak summer rays, embodying the essence of early autumn's golden charm. Typically rich in sunshine, the region experiences a gradual decrease in daylight hours as the year progresses, with June and July basking in the most sun at 330 and 357 hours, respectively. Such patterns suggest that while the summer months radiate warmth and vitality, September offers a softer glow, inviting visitors to savor the lingering sunshine while preparing for the approaching chill of October.
As summer transitions into fall, September in Wisconsin Dells offers a promising 61% chance of sunny weather, the highest probability for sunshine this year. This uptick comes after a consistently bright August, which recorded 57%, indicating that sunny days are likely to linger into early autumn. Following the peak in September, the chances of sunshine dip notably in October, down to 38%, signaling a shift toward cloudier conditions. Overall, the trend reveals that as we bid farewell to summer, September stands out as an ideal time for outdoor activities, capitalizing on the warm remnants of summer sunshine before the cooler months set in.
In Wisconsin Dells, September marks a transition as daylight begins to wane, offering around 12 hours of sunlight—a gentle decline from the vibrant 15 hours experienced in the height of summer. This month serves as a bridge between the long days of summer and the shortening hours of fall, showcasing a gradual retreat of daylight that highlights the changing seasons. Following the lively brightness of July and August, September invites a more subdued yet picturesque ambiance, perfect for enjoying the stunning autumn foliage. As the days shorten leading into October, the natural light becomes increasingly precious, accentuating the charm of Wisconsin Dells during this transitional time.
As September arrives in Wisconsin Dells, the winds begin to dance a little more energetically, with an average speed of 3.3 m/s (7 mph). This slight uptick from the calm summer months of July and August, which saw winds at a gentle 2.8 m/s (6 mph), signals a shift towards the briskness of autumn. The September breeze is reminiscent of the transitional nature of the season, paving the way for the cooler, more vibrant months ahead. Interestingly, the wind speeds here are relatively consistent with those observed in October, suggesting a harmonious flow into fall. The trend signals a gradual increase from the lighter summer breezes, making this time of year perfect for outdoor adventures amidst the changing foliage.
The weather in Wisconsin Dells 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 Wisconsin Dells and find detailed weather information for every month.
In September, temperatures in Wisconsin Dells range significantly, with a minimum of 2°C (36°F) and a maximum of 33°C (92°F), leading to an average of 18°C (64°F). This month sees considerable rainfall, accumulating 98 mm (3.9 in) over about 10 days, along with a humidity level of 79%. In stark contrast, January experiences frigid temperatures, with a minimum of -32°C (-26°F) and a maximum of 9°C (48°F), resulting in an average of -7°C (20°F). Precipitation is much lower in January at 43 mm (1.7 in) over 7 days, and the humidity is slightly higher at 85%. For more details on the January conditions, check out Wisconsin Dells weather in January.
September and February showcase strikingly different weather patterns. In September, temperatures range from a chilly 2°C (36°F) at night to a warm 33°C (92°F) during the day, with an average of 18°C (64°F). This month experiences considerable rainfall, totaling 98 mm (3.9 in) over roughly 10 days, accompanied by a humidity level of 79%. Conversely, February is quite harsh, with temperatures plummeting as low as -32°C (-26°F) and averaging -6°C (21°F), peaking at 18°C (64°F). Precipitation is notably lower at 52 mm (2.0 in) over about 8 days, and humidity is slightly higher at 85%. For a more detailed look at February weather, you can visit Wisconsin Dells weather in February.
September and March present striking contrasts in weather patterns. In September, temperatures range widely from a minimum of 2°C (36°F) to a maximum of 33°C (92°F), with an average of 18°C (64°F). This month sees significant rainfall, accumulating to 98 mm (3.9 in) over about 10 days, alongside a humidity level of 79%. In contrast, March features a much colder climate, with temperatures dipping as low as -24°C (-11°F) and only reaching a maximum of 19°C (66°F) while averaging 1°C (35°F). Precipitation is lower in March, with 58 mm (2.3 in) spread over 8 days, and a slightly higher humidity of 85%. For more details on what to expect, check out Wisconsin Dells weather in March.
When comparing the weather of September and April, distinct differences emerge. September typically enjoys a broader temperature range, with minimums around 2°C (36°F) and maximums peaking at 33°C (92°F), culminating in an average of 18°C (64°F). In contrast, April experiences cooler temperatures, starting at a minimum of -11°C (12°F), averaging only 7°C (45°F), and reaching a maximum of 26°C (79°F). Precipitation levels are slightly higher in September at 98 mm (3.9 in) over 10 days, while April sees 92 mm (3.6 in) across 12 days, contributing to a more humid atmosphere in both months—with September at 79% and April slightly higher at 85%. For a deeper look at April weather specifics, refer to Wisconsin Dells weather in April.
When comparing the weather in September and May, a few notable differences emerge. September generally features warmer temperatures, with a minimum of 2°C (36°F) and an average high of 33°C (92°F), while May starts off cooler, peaking at a maximum of 34°C (93°F) but with a minimum of -1°C (30°F). Both months experience considerable precipitation, but May tends to be wetter, averaging 126 mm (5.0 in) over 14 days compared to September's 98 mm (3.9 in) over 10 days. Humidity levels are similar, with September slightly higher at 79% compared to May's 78%. For more details about the weather specifics in May, you can visit Wisconsin Dells weather in May.
In comparing the weather between September and June, we see notable differences in temperature and precipitation. September experiences a wider range of temperatures, with minimums dipping to 2°C (36°F) and highs reaching up to 33°C (92°F), while June has a warmer range, with minimums at 7°C (45°F) and maximums peaking at 34°C (93°F). Precipitation is slightly higher in June, with 115 mm (4.5 in) falling over 11 days compared to September's 98 mm (3.9 in) over 10 days. Humidity levels are quite similar, with September at 79% and June at 80%. For more details about June weather specifically, you can check Wisconsin Dells weather in June.
In comparing the weather of September and July, September tends to have cooler minimum temperatures, dropping to 2°C (36°F) compared to July's milder minimum of 13°C (55°F). The average temperature in September is also lower at 18°C (64°F) versus July's 23°C (74°F), making September feel more autumnal. However, both months experience similar maximum temperatures, with September peaking at 33°C (92°F) and July just slightly higher at 34°C (94°F). Precipitation levels are comparable, with September receiving 98 mm (3.9 in) and July 96 mm (3.8 in), each having rain on about 10 days. Humidity remains consistent, with September at 79% and July at 78%. For a detailed look at the weather patterns, you can check Wisconsin Dells weather in July.
September brings slightly cooler temperatures compared to August, with minimums dropping to 2°C (36°F) from August's 8°C (47°F), while the average temperature decreases from 21°C (71°F) in August to 18°C (64°F) in September. Both months experience similar maximum temperatures, with September reaching up to 33°C (92°F) and August slightly lower at 33°C (91°F). Precipitation levels are also comparable, with September receiving 98 mm (3.9 in) over 10 days, just a bit less than August's 110 mm (4.3 in) over 11 days. Humidity is slightly higher in September at 79%, compared to August's 76%. For more details, check out Wisconsin Dells weather in August.
In comparing the weather between September and October, we see a notable shift in temperatures and conditions. September experiences warmer temperatures with a minimum of 2°C (36°F) and an average of 18°C (64°F), peaking at 33°C (92°F). In contrast, October brings cooler temperatures, with lows dropping to -5°C (24°F) and an average of 10°C (50°F), although it still reaches a maximum of 29°C (85°F). Additionally, both months witness significant precipitation, with September recording 98 mm over 10 days and October slightly higher at 102 mm over 12 days. Humidity levels also increase slightly from September’s 79% to October’s 83%. For more detailed insights, you can check Wisconsin Dells weather in October.
In September, temperatures range from a mild 2°C (36°F) at night to a warm 33°C (92°F) during the day, with an average of 18°C (64°F). The month sees 98 mm (3.9 in) of precipitation over about 10 days, and humidity hovers around 79%. In contrast, November brings significantly colder temperatures, with a chilling minimum of -15°C (5°F) and an average of only 2°C (36°F), reaching a maximum of 22°C (72°F). Precipitation decreases to 45 mm (1.8 in) and occurs over just 7 days, alongside a higher humidity level of 88%. For more detailed insights, check out Wisconsin Dells weather in November.
September and December present starkly contrasting weather conditions. In September, temperatures range from a minimum of 2°C (36°F) to a warm maximum of 33°C (92°F), with an average of 18°C (64°F). The month typically experiences 98 mm (3.9 in) of precipitation over 10 days, coupled with a humidity level of 79%. In contrast, December is characterized by much colder temperatures, with a minimum plunging to -24°C (-10°F) and an average of -3°C (28°F), peaking at 17°C (63°F). Precipitation drops to 45 mm (1.8 in) over just 6 days, while humidity remains fairly high at 81%. For more details on December weather, you can visit Wisconsin Dells weather in December.
As summer waves goodbye and autumn begins to paint the landscape, September in Wisconsin Dells offers a unique blend of warmth and cooling breezes. Unlike the sweltering heat of July and August, the air becomes more comfortable, featuring an average temperature that invites outdoor exploration without the relentless sun. Yet, the increased humidity and notable rainfall remind visitors that fall is approaching, adding a refreshing touch to this scenic destination. The transition is palpable as the first hints of colorful foliage unfold against the backdrop of occasional rainy days. For a deeper dive into how September stands apart from other months, check out Wisconsin Dells Climate.