Last updated: March 24, 2025
September in Milan, Italy, welcomes a gentle transition from summer warmth to autumn coolness. The maximum temperature can reach a balmy 32°C (89°F), while an average of 20°C (69°F) offers pleasant days for exploration. However, evenings cool off significantly, with lows dipping to 8°C (46°F). Rainfall is a notable feature this month, accumulating 131 mm (5.2 in) over approximately 10 days, contributing to a humidity level of 74%. This mix of warmth and moisture sets the stage for enjoying the vibrant culture and beautiful scenery of Milan amidst a backdrop of shifting seasons.
As summer fades, Milan's September temperatures offer a delightful transition into autumn. With daily averages around 20°C (69°F), this month enjoys pleasant warmth, while nighttime lows dip to a comfortable 8°C (46°F). The city basks in sunny days, with maximums reaching up to 32°C (89°F), making it a perfect time for leisurely strolls through picturesque streets or vibrant open-air markets. This blend of mildness and warmth heralds a gradual cool down, setting the stage for the crisp fall months ahead. Whether you're savoring gelato in a sunlit piazza or enjoying the evening breeze, September in Milan strikes a harmonious balance between summer's heat and autumn's embrace.
September in Milan marks a significant transition as summer gives way to autumn, reflected in the city's precipitation patterns. With 131 mm (5.2 in) of rainfall over 10 days, this month is among the wettest, matching the peak precipitation seen in July. The frequency of rainy days increases slightly, hinting at the onset of a wetter season as the temperature begins to drop. This is a stark contrast to the drier months of July and August, which, while still relatively humid, don’t reach the same levels. As the vibrant summer fades, September’s rainfall lays the groundwork for the lush, colorful landscape of autumn in Milan.
In September, Milan experiences a slight uptick in humidity, averaging around 74%. This marks a notable shift from the dry summer months, where humidity levels dipped to their lowest at 64% in August. As the city transitions into autumn, the humidity begins to increase, paving the way for the later months where figures rise dramatically, peaking at 88% by November. The trend showcases Milan's seasonal fluctuations, highlighting a return to the moisture-laden atmosphere characteristic of its winter months. Overall, September serves as a bridge between the warm, dry summer and the cooler, more humid fall.
In September, Milan experiences a UV Index of 6, placing it in the high exposure category. This marks a slight drop from the peak summer months, where the index reached a maximum of 9 in June and July. With a recommended burn time of 25 minutes, it's essential to take precautions when enjoying the outdoors, even as summer transitions to fall. The UV levels continue to reflect a gradual decrease, signaling the arrival of cooler weather, but vigilance is still key to protecting your skin. For a detailed understanding of UV exposure throughout the year, visit Milan UV Index.
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As summer gently wanes, September brings a delightful blend of warmth and light to Milan, with 335 hours of sunshine illuminating the city's vibrant streets. This month showcases a remarkable transition, retaining much of the sunny disposition of August, yet signaling a gradual decline in daylight as autumn approaches. The trend toward shorter days can be seen when compared to the sun-drenched heights of July and June, which boast over 400 hours. Nevertheless, September remains a charming time to explore Milan, as daytime warmth still graces the city, while the changing light casts a unique glow on its historical architecture and picturesque canals. This blend of lingering summer radiance and the subtle onset of fall invites both locals and tourists to savor the beauty of the city before the deeper chill of autumn settles in.
As September arrives in Milan, the likelihood of sunny weather holds steady with a 49% chance of sunshine. This places the month in an intriguing position, slightly below the peak summer months of August and July, which boast 59% and 47% chances, respectively. It’s interesting to note that while sunshine levels dip from the highs of summer, they remain consistent with October's 49%, creating a smooth transition into autumn. Overall, September's weather offers a delightful blend of warmth and light, perfect for exploring the vibrant streets of Milan before the chill of fall sets in.
As summer wanes into autumn, September in Milan, Italy, offers a gentle transition with approximately 12 hours of daylight. Following the peak summer months of June and July, where daylight extends to a generous 15 hours, the daylight begins to decrease as the city prepares for the cozy embrace of fall. This month balances the lingering warmth of late summer with the hint of shorter days ahead, providing ample opportunity to enjoy Milan's vibrant streets and historical charm. As daylight dwindles further into October, dropping to 10 hours, September serves as a crucial bridge, inviting residents and visitors alike to savor the last of the sun's embrace before the nights grow longer.
As summer gracefully transitions into autumn, September's winds in Milan tend to slow down, averaging just 1.7 m/s (4 mph)—the calmest of the year. This slight dip in wind speed reflects the city's shift toward cooler temperatures, echoing the tranquil ambiance that blankets the streets. Unlike the gentle breezes of spring, which peak at 2.2 m/s in April and May, September feels like a soft sigh, inviting residents and visitors alike to savor the lingering warmth before the briskness of autumn truly sets in. The consistent wind patterns throughout the year highlight Milan's moderate climate, with a reassuring steadiness that characterizes the gentle flow of life in this vibrant city.
The weather in Milan 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 Milan and find detailed weather information for every month.
The weather in September is significantly warmer than in January, with average temperatures ranging from a minimum of 8°C (46°F) to a maximum of 32°C (89°F). In contrast, January sees much colder temperatures, with an average low of -5°C (22°F) and a maximum of only 16°C (61°F). Additionally, September experiences higher precipitation, averaging 131 mm (5.2 in) over 10 days, compared to January's drier conditions with only 35 mm (1.4 in) across 5 days. Humidity levels also vary, with January being notably more humid at 88%, compared to September's 74%. For more detailed information about January weather, you can visit Milan weather in January.
September and February present contrasting weather patterns, highlighting the transition from late summer to winter. In September, temperatures range from a comfortable minimum of 8°C (46°F) to a warm maximum of 32°C (89°F), with an average of 20°C (69°F). The month experiences significant rainfall, totaling 131 mm (5.2 in) over about 10 days, and a humidity level of 74%. In contrast, February is much cooler, with temperatures dipping to a minimum of -5°C (23°F) and averaging 7°C (44°F), peaking at 21°C (70°F). Precipitation is also lower in February at 46 mm (1.8 in) over 6 days, but humidity remains higher at 81%. For more detailed information about February weather, check out Milan weather in February.
When comparing the weather in September and March, significant differences emerge. September generally experiences warmer temperatures, with minimums around 8°C (46°F) and maximums reaching up to 32°C (89°F), averaging at 20°C (69°F). In contrast, March is notably cooler, with minimum temperatures dropping to -5°C (23°F) and maximums capping at 24°C (76°F), leading to an average of only 10°C (50°F). Additionally, September sees higher precipitation, with 131 mm (5.2 in) over about 10 days, while March has a milder 74 mm (2.9 in) over 8 days. Humidity levels remain relatively similar, with September at 74% and March at 76%. For a detailed look at March conditions, visit Milan weather in March.
When comparing the weather in September and April, notable differences emerge. September typically boasts warmer temperatures, with a minimum of 8°C (46°F) and an average of 20°C (69°F), whereas April's temperatures can drop to as low as 0°C (33°F), averaging around 14°C (58°F). In terms of maximums, September can reach up to 32°C (89°F), making it significantly hotter than April's warmest day at 27°C (81°F). Additionally, September experiences more precipitation, with 131 mm (5.2 in) over approximately 10 days compared to April's 89 mm (3.5 in) over 9 days. Interestingly, both months have high humidity levels, with September at 74% and April slightly higher at 77%. For more detailed insights, check out Milan weather in April.
September and May offer distinct weather experiences despite their similar humidity levels. September typically features a wider temperature range, with minimums at 8°C (46°F) and maximums reaching 32°C (89°F), making it warmer on average compared to May, where the minimum temperature is 5°C (42°F) and the maximum is 34°C (93°F). Both months see significant precipitation, with September recording 131 mm over 10 days and May slightly less at 120 mm over 15 days. For a closer look at May's climate in Milan, you can explore Milan weather in May.
When comparing the weather in September and June, we observe some distinct differences. September generally has a cooler temperature range, with a minimum of 8°C (46°F) and an average high of 32°C (89°F), while June starts warmer with a minimum of 13°C (56°F) and can reach highs of 39°C (102°F). Both months experience notable precipitation, but September receives slightly more at 131 mm (5.2 in) over about 10 days, compared to June's 120 mm (4.7 in) over approximately 8 days. Humidity levels are relatively similar, with September at 74% and June at 71%. For more details on June weather specifically, you can visit Milan weather in June.
September weather is characterized by a wider temperature range compared to July, with minimums dropping to 8°C (46°F) while highs can reach 32°C (89°F). In contrast, July boasts a warmer average temperature of 25°C (77°F) and maximums peaking at 36°C (98°F). Both months experience similar levels of precipitation—around 131 mm (5.1-5.2 in)—but September has slightly more rainy days (10) compared to July (12). Additionally, September’s humidity is higher at 74%, compared to July’s comfortable 67%. For a detailed look at July weather, you can check Milan weather in July.
In comparing the weather of September and August, September tends to be cooler, with minimum temperatures dropping to 8°C (46°F) compared to August's minimum of 14°C (58°F). While the average temperature in August reaches a warmer 25°C (77°F), September's average is lower at 20°C (69°F), with maximums peaking at 32°C (89°F) compared to August's hotter 36°C (98°F). Rainfall is slightly higher in September, accumulating to 131 mm (5.2 in) over 10 days, whereas August sees 101 mm (4.0 in) of precipitation over 9 days. Additionally, September experiences higher humidity levels at 74%, in contrast to August's 64%. For more detailed information, you can check Milan weather in August.
September and October present a notable transition in weather patterns. In September, temperatures range from a mild 8°C (46°F) at night to a warm 32°C (89°F) during the day, with an average of 20°C (69°F). The month sees considerable rainfall, totaling 131 mm (5.2 in) over 10 days and humidity levels at 74%. By October, the temperatures drop, with minimums of 4°C (40°F), an average of 15°C (59°F), and a maximum of 28°C (83°F). Precipitation decreases slightly to 103 mm (4.1 in) over 8 days, but humidity rises to 87%. This shift highlights the cooling trend and increased moisture as the seasons change. For more detailed information, check out Milan weather in October.
In September, temperatures in Milan are quite warm, ranging from a minimum of 8°C (46°F) to a maximum of 32°C (89°F), with an average of 20°C (68°F). The month experiences around 131 mm (5.2 in) of precipitation over about 10 days and has a humidity level of 74%. In contrast, November sees a notable drop in temperatures, with averages between -2°C (29°F) and 18°C (65°F), settling around 10°C (49°F) on average. Precipitation increases slightly to 149 mm (5.9 in) across approximately 12 days, accompanied by higher humidity at 88%. For more details, you can check out Milan weather in November.
September and December present quite contrasting weather conditions. In September, temperatures are generally milder, ranging from a minimum of 8°C (46°F) to a maximum of 32°C (89°F), with an average of 20°C (69°F). The month experiences significant precipitation, totaling 131 mm (5.2 in) over about 10 days, and humidity levels hover around 74%. In stark contrast, December sees much colder temperatures, with a minimum of -5°C (23°F) and a maximum of 15°C (59°F), averaging at just 5°C (41°F). Although precipitation is lower at 87 mm (3.4 in) over 8 days, the humidity rises to 85%. For more details about December's weather in Milan, you can check Milan weather in December.
As September rolls into Milan, the weather starts to shift, offering a delightful blend of summer warmth and early autumn's crispness. With temperatures peaking at a comfortable 32°C and a pleasant average of 20°C, it's a perfect time to explore the city. However, the month is also marked by increased precipitation, with rain gracing about 10 days, making it distinct from the typically dry summer months. Coupled with humidity levels around 74%, the air feels livelier, hinting at the changes to come. For more on how Milan's September weather compares to the rest of the year, explore our detailed guide on Milan Climate.