Last updated: March 24, 2025
In September, San Siro experiences a delightful range of temperatures, with a maximum of 25°C (78°F) and an average of 16°C (61°F), making it a pleasant time to explore the region. However, as autumn approaches, the minimum can dip to 4°C (39°F), reminding visitors to pack layers. Rainfall is a notable feature of the month, with 161 mm (6.3 in) spread over 14 days, contributing to a humidity level of 74%. While the weather may be unpredictable, the vibrant atmosphere and picturesque landscapes of San Siro during this time offer a unique charm for travelers and locals alike.
In September, San Siro, Italy, experiences a refreshing transition from the warmth of summer to the cooler embrace of autumn. With minimum temperatures hovering around 4°C (39°F), the month starts to show a noticeable drop from the summer highs. However, the average temperature reaches a comfortable 16°C (61°F), making it a delightful time for outdoor activities and exploring the city. The maximum temperature peaks at 25°C (78°F), still warm enough to enjoy the lingering sunshine. As September unfolds, residents and visitors alike can relish in the pleasant, mild climate that characterizes this month, while hinting at the cooler days ahead.
In September, San Siro experiences a notable transition in its weather patterns, marked by an average precipitation of 161 mm (6.3 in) spread across 14 days. This amount reflects a dip from the peak rainfall of August, which recorded 222 mm (8.7 in), but still indicates the persistence of early autumn showers. The consistent rainfall creates a lush backdrop for the early fall, as nature begins to prepare for the cooler months ahead. As the season shifts, this pattern shows a gradual decline in precipitation leading into October, where San Siro sees an increase again to 223 mm (8.8 in), suggesting that while September may signal a reduction in rain, the climate remains dynamic and wet, setting the stage for a vibrant autumn landscape.
As summer transitions into autumn, September in San Siro, Italy, showcases a noticeable uptick in humidity, reaching 74%. This marks a slight increase from the low of 64% in August, indicating that the warm, dry summer days are giving way to the more humid months ahead. The gradual rise in humidity levels from July's 67% through September reflects a shifting climate as the region prepares for the dampness of fall, where the humidity spikes again to 87% in October. While September may provide some relief from the intense summer heat, it also signals the onset of a more humid season, preparing San Siro for the wetter months that lie ahead.
As September arrives in San Siro, Italy, residents and visitors can expect a notable shift in the UV Index, which stands at 7, placing it in the high exposure category. This marks a slight decrease from the peak summer months of July and August, where the UV Index consistently reached 9, indicating very high exposure levels. Despite the drop, with an average burn time of just 25 minutes, it's essential to remain vigilant about sun safety. The transition from summer to fall reflects a gradual easing of the intense sun, but as September maintains a strong UV presence, sun protection remains crucial. For ongoing updates and safety tips, you can check the San Siro UV Index.
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In September, San Siro, Italy, basks in a delightful 326 hours of sunshine, marking a gentle transition from the intense summer glow. As the warm days of July peak with 422 hours, the sunlight begins to wane, leading to a gradual decrease through the autumn months. However, September still maintains a vibrant ambiance, outshining the cooler October, which dips to 285 hours. This gradual shift signifies not only the changing seasons but also a lingering appreciation for the warmth as the landscape prepares for the cooler days ahead. September's sun paints a picturesque backdrop for locals and tourists alike, setting the stage for cozy evenings amidst the fading light of summer.
In September, San Siro, Italy experiences a 37% chance of sunny weather, offering a pleasant transition from the summer’s warmth. The likelihood of sunshine begins to dip from the peak summer months, with August reaching a higher 53% before settling into a more moderate pattern. Notably, this decrease is consistent with the preceding months, where sunny days are often flirted with but not guaranteed. Compared to the earlier spring months like March, which boasts a 62% chance of sun, September feels like a gentle step back into autumn, making it an ideal time for those who appreciate milder weather—but it’s wise to keep an umbrella handy just in case!
As summer fades into autumn, September in San Siro, Italy, ushers in a gradual reduction in daylight, offering about 12 hours of sunlight. This month marks a transition, with daylight hours notably tapering from the 15 hours experienced in July and June. While October will further shorten this luminescent embrace to 10 hours, the lingering warmth of September still provides ample opportunity for outdoor activities. The trend highlights a rhythm of nature as it shifts from the long, sun-drenched days of summer to the cozy, shorter hours of fall, inviting reflections on the changing seasons.
As September sweeps into San Siro, the gentle whispers of the wind signal the transition from the vibrant summer months to the crisp embrace of autumn. With an average wind speed of just 1.1 m/s (2 mph), this month experiences the calmest breezes of the year, reflecting a noticeable dip after the warm, albeit steady winds of July and August. This trend of decreasing wind speeds continues from the peak summer months, diverging from the slightly higher gusts observed earlier in the year. As the days grow shorter and the air turns cooler, the subtle shift in the wind serves as a reminder of nature's rhythmic cycles, inviting residents and visitors alike to savor the tranquil beauty of San Siro before winter settles in.
The weather in San Siro 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 San Siro and find detailed weather information for every month.
September and January exhibit striking differences in weather patterns. September boasts milder temperatures, with averages around 16°C (61°F) and highs reaching up to 25°C (78°F), making it a pleasant month for outdoor activities. However, it also experiences significant precipitation, with around 161 mm (6.3 in) falling over about 14 days, contributing to a humidity level of 74%. In contrast, January presents a much colder landscape, with average temperatures dropping to just 1°C (35°F) and lows plunging to -11°C (12°F). January sees less rain, totaling only 48 mm (1.9 in) over about 7 days, but the humidity is noticeably higher at 88%. For more detailed insights, check out San Siro weather in January.
When comparing the weather in September and February, notable differences arise in temperature and precipitation patterns. September enjoys milder temperatures, ranging from a minimum of 4°C (39°F) to a maximum of 25°C (78°F), with an average of 16°C (61°F). In contrast, February experiences much colder conditions, with a minimum temperature of -12°C (10°F) and a maximum of 18°C (65°F), giving it an average of just 3°C (39°F). Additionally, September sees higher precipitation levels, totaling 161 mm (6.3 in) over about 14 days, compared to February, which has only 52 mm (2.0 in) of rainfall distributed across 8 days. Furthermore, February's humidity reaches around 81%, slightly higher than September's 74%. For a closer look at February’s weather, check out San Siro weather in February.
When comparing the weather in September and March, notable differences emerge. September enjoys a milder temperature range, with minimums around 4°C (39°F) and maximums reaching 25°C (78°F), while March experiences colder temperatures, starting as low as -8°C (17°F) and peaking at 20°C (68°F). Precipitation levels are higher in September, with 161 mm (6.3 in) over 14 days, compared to March's 105 mm (4.1 in) occurring over 11 days. Interestingly, humidity levels remain quite similar, hovering around 74% in September and slightly higher at 76% in March. To explore more about the specific weather conditions in March, you can visit San Siro weather in March.
In September, the weather generally presents a warmer profile with average temperatures reaching up to 16°C (61°F) and maximums of 25°C (78°F), compared to the cooler April, where the average hovers around 10°C (50°F) with highs of 23°C (74°F). While both months experience similar precipitation levels, September records approximately 161 mm (6.3 in) over 14 days, while April sees slightly more rain, totaling 162 mm (6.4 in) across 13 days. Additionally, humidity levels are slightly lower in September at 74%, compared to April's 77%, making the latter feel a bit more refreshing. For more detailed insights on April weather, you can check San Siro weather in April.
In comparing the weather between September and May, September offers slightly warmer temperatures, with daily averages around 16°C (61°F) and maximums reaching up to 25°C (78°F), while May averages a bit cooler at 14°C (57°F) and peaks at 26°C (80°F). Both months experience considerable precipitation, with September receiving 161 mm (6.3 in) over 14 days and May totaling 202 mm (8.0 in) over 19 days. Interestingly, humidity levels remain consistent at 74% for both months, contributing to a generally moist atmosphere. For a closer look at May's weather specifics, visit San Siro weather in May.
September weather tends to be milder compared to June, with average temperatures ranging from a minimum of 4°C (39°F) to a maximum of 25°C (78°F), while June boasts warmer conditions, with temperatures stretching from 8°C (46°F) to a high of 33°C (92°F). Additionally, September sees slightly less rainfall, totaling 161 mm (6.3 in) over 14 days, compared to June's heavier precipitation of 219 mm (8.6 in) across 17 days. Humidity levels are relatively similar, with September at 74% and June slightly lower at 71%. For a detailed look at the weather during this month, you can check San Siro weather in June.
When comparing the weather in September and July, it’s evident that July tends to be warmer and drier. In July, temperatures range from a minimum of 10°C (50°F) to a maximum of 30°C (86°F), with an average of 20°C (68°F). September, on the other hand, sees cooler temperatures, with a minimum of 4°C (39°F) and a maximum of 25°C (78°F), averaging at 16°C (61°F). Additionally, July experiences somewhat lower humidity at 67% compared to September's 74%. Precipitation is also notable, with July receiving 187 mm (7.4 in) over 17 days, while September has 161 mm (6.3 in) across 14 days. For further details on July weather, you can check San Siro weather in July.
In comparing the weather of September and August, September tends to be cooler, with temperatures ranging from a minimum of 4°C (39°F) to a maximum of 25°C (78°F), and an average of 16°C (61°F). Conversely, August experiences higher temperatures, with lows of 10°C (50°F) and highs reaching up to 30°C (86°F), averaging 20°C (68°F). Precipitation is also notably different; September receives 161 mm (6.3 in) of rain over 14 days, while August has a higher total of 222 mm (8.7 in) over 17 days. Additionally, September's humidity level is at 74%, compared to August's lower humidity of 64%. For more detailed information, you can check out San Siro weather in August.
September and October show a noticeable transition in weather patterns. In September, temperatures range from a mild 4°C (39°F) at night to a pleasant maximum of 25°C (78°F) during the day, with an average of 16°C (61°F). The month sees significant precipitation, totaling 161 mm (6.3 in) over 14 days, accompanied by a humidity level of 74%. In contrast, October brings cooler temperatures, with a minimum of 1°C (35°F) and an average of 11°C (53°F), peaking at 23°C (73°F). This month experiences even more rainfall, accumulating 223 mm (8.8 in) over 11 days and rising humidity to 87%. For those interested in the specifics, you can find more details about San Siro weather in October.
September and November showcase contrasting weather patterns as the seasons shift. In September, temperatures range from a mild 4°C (39°F) at night to a warm 25°C (78°F) during the day, with an average of 16°C (61°F). Despite having 14 rainy days, the precipitation is slightly lower at 161 mm (6.3 in) and the humidity sits at a comfortable 74%.
In stark contrast, November sees much cooler temperatures, dipping to a minimum of -3°C (27°F) and peaking at 16°C (61°F), averaging just 7°C (44°F). While the precipitation increases slightly to 177 mm (7.0 in) over 13 days, humidity rises to 88%, making the air feel much colder. For more detailed information on November conditions, you can check San Siro weather in November.
The weather in September is generally milder and more temperate, with average temperatures ranging from a minimum of 4°C (39°F) to a maximum of 25°C (78°F). This month experiences significant precipitation, totaling 161 mm (6.3 in) over approximately 14 days, contributing to a humidity level of 74%. In contrast, December brings a stark chill, with average temperatures dropping to a minimum of -9°C (17°F) and a maximum of 13°C (55°F). Although December receives less rainfall at 108 mm (4.2 in) over 9 days, the humidity is slightly higher at 85%. For more details on the December climate, you can check San Siro weather in December.
As summer fades and autumn approaches, September in San Siro offers a unique transitional climate that sets it apart from the preceding months. The temperatures provide a comfortable balance, with warm days giving way to cooler evenings, perfect for outdoor explorations. While the average daytime temperature hovers around a pleasant 16°C, the potential for rain is more pronounced this month, with precipitation making its presence felt for nearly half the month. Humidity levels are relatively high, adding a slight weight to the air, yet this only enhances the vibrant tapestry of autumn colors that begin to emerge. For those looking to understand the nuances of San Siro’s enchanting weather, be sure to check out San Siro Climate.