September Weather in Monza, Italy

Last updated: March 24, 2025

September in Monza, Italy showcases a diverse climate, with temperatures ranging from a minimum of 8°C (46°F) to a maximum of 32°C (89°F). The average temperature settles comfortably at 20°C (69°F), offering pleasant conditions for outdoor activities. As summer transitions to autumn, the city experiences 131 mm (5.2 in) of rainfall over approximately 10 days, contributing to a humidity level of 74%. This blend of warmth and moisture creates a lush environment, perfect for exploring Monza's rich history and vibrant culture.

September Temperature in Monza

In September, Monza, Italy, experiences a pleasant transition from the sweltering summer to the cooler embrace of autumn. With minimum temperatures around 8°C (46°F), the days grow increasingly comfortable, showcasing an average of 20°C (69°F) that invites locals and visitors alike to enjoy the outdoors. As the mercury peaks at a maximum of 32°C (89°F), the warmth lingers for a bit longer, making late summer activities still quite enjoyable. This month not only offers a respite from the heat of summer but also hints at the crispness of fall, striking a beautiful balance that reflects the region's vibrant seasonal shift. Whether strolling through the historic streets or relaxing in a café, September in Monza promises delightful weather and a vibrant atmosphere.

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

The chart illustrates September temperature patterns in Monza, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends.
JanFebMarAprMayJunJulAugSepOctNovDec394450576575777768594940
Data source: Temperature data for Monza 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 Monza

September in Monza, Italy, marks the transition into autumn with notable precipitation patterns. This month sees a significant uptick in rainfall, averaging 131 mm (5.2 in), matching the intensity of July, making it one of the wettest months of the year. Rain graces the city on about 10 days, providing a refreshing end to the warmer summer months. As temperatures begin to cool, the increased rainfall not only supports the vibrant autumn foliage but also signals the shift from the dry summer, which experienced a peak of 131 mm in July, to the wetter months ahead. This trend underscores the dynamic climate of Monza, where each season brings its own unique weather signature.

September Precipitation Trends in Monza

The chart displays monthly precipitation patterns in Monza, 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.
JanFebMarAprMayJunJulAugSepOctNovDec3546748912012013110113110314987
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

September Humidity in Monza

September in Monza, Italy, marks a transition from the warmth of summer to the cooler embrace of autumn, reflected in its humidity levels. After a steady decline throughout the summer months, where humidity dipped to a comfortable 64% in August, September sees a slight uptick to 74%. This increase hints at the re-emergence of moisture in the air as the days grow shorter and cooler. While still lower than the winter months, where humidity can soar to 88% in January and November, September's levels indicate a balance—offering a refreshing reprieve before the heavier, wetter months of fall and winter settle in. As one prepares for the shifting seasons, September's humidity serves as a gentle reminder of nature's cyclical rhythm.

September Average Humidity in Monza

This chart illustrates the average monthly humidity levels in Monza, 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.
JanFebMarAprMayJunJulAugSepOctNovDec88%81%76%77%74%71%67%64%74%87%88%85%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Monza

As summer wanes and September arrives in Monza, Italy, the UV Index drops to 6, indicating a high exposure level with a burn time of 25 minutes. This marks a transition from the intense summer months, where the UV Index peaked at 9 in both June and July. While the sun's rays remain potent, they are less fierce than in the preceding months, making early fall a great time to enjoy the outdoors while still being mindful of sun protection. As the season shifts further into autumn, the UV Index will continue to decrease, reflecting a broader trend of diminishing sun intensity; however, it’s still wise to check the Monza UV Index when planning outdoor activities.

Maximum UV Index Levels in Monza for September

The chart shows the monthly maximum UV Index (UVI) for Monza 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.
JanFebMarAprMayJunJulAugSepOctNovDec235689986532
Data source: Monza 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 Monza

As summer gracefully transitions into autumn, September in Monza offers a delightful balance of warmth and sun. With 335 hours of sunshine, the month maintains a vibrant glow, reminiscent of the sunny peaks seen in July and June. While September's sunshine hours dip from the peak summer months, they surpass the earlier part of the year, reflecting the beauty of early autumn. This trend highlights the city's charm, where the lingering warmth of summer mingles with the crispness of fall, making it an idyllic time for both locals and tourists to explore Monza's picturesque landscapes and historic wonders.

Monthly Sunshine Duration in Monza: September Highlighted

The September sunshine duration represents the total number of hours Monza 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.
JanFebMarAprMayJunJulAugSepOctNovDec190h233h311h346h391h412h428h391h335h295h218h214h
Data source: Monza September Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Monza During September

In Monza, Italy, September offers a pleasant blend of summer warmth and the anticipation of autumn, with a 49% chance of sunny weather. This figure shows a slight dip from the more radiant month of August, which boasts a 59% chance of sunshine, yet still holds its own amongst the year's offerings. Notably, September's likelihood of clear skies aligns closely with the cooler months of October, each at 49%, making it a favorable time for outdoor activities. As the year progresses, the sunny probabilities fluctuate, peaking in March at 65% before gradually decreasing, but September stands out as a sweet spot for enjoying the lingering warmth of summer.

Percentage of Sunny Days in September in Monza

The chart illustrates the percentage of sunny days in Monza 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 Monza experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec35%41%65%46%45%50%47%59%49%49%38%46%
Data source: Monza September chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Monza in September

September in Monza, Italy, signals a gentle transition from the long summer days of June and July, which basked in 15 hours of daylight. As the warmth of summer fades, the daylight duration begins to shorten, offering around 12 hours of light, a subtle shift that hints at the encroaching fall. This month acts as a bridge, with daylight diminishing from the 14 hours of August yet still stretching longer than the 10 hours typically seen in October. The gradual reduction in light hours not only affects the landscape but also invites locals and visitors alike to relish the lingering warmth of early autumn as nature begins its transformation.

Average Daylight Hours in Monza for September

The chart illustrates the variation in daylight duration in Monza throughout the year, with September highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec9h 7m10h 22m11h 56m13h 33m14h 55m15h 37m15h 15m14h 1m12h 29m10h 53m9h 28m8h 44m
Data source: Monza daylight hours, calculated by summing the hours between sunrise and sunset for each day.

September Winds in Monza

As summer transitions to autumn in Monza, Italy, September brings a serene calm reflected in its average wind speed of 1.7 m/s (4 mph). This slight decrease marks a shift from the gentle breezes of the warmer months, with June and May both witnessing slightly higher winds at 2.1 m/s and 2.2 m/s respectively. The consistent pattern of wind speeds throughout the year shows a peak during the spring months, which gradually tapers off as the year winds down. Notably, September's minimal wind not only sets a tranquil ambiance but also paves the way for the crisp, refreshing air of October, making it a perfect time to revel in the beauty of Monza's landscapes.

Average September Wind Speed in Monza

The chart displays monthly wind speed patterns in Monza, 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.
JanFebMarAprMayJunJulAugSepOctNovDec1.91.82.02.22.22.11.91.91.7 m/s1.81.92.0
Data source: Monza September wind data, generated using information from the Copernicus Climate Change Service.

How September Weather in Monza Compares to Other Months

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

September and January present starkly contrasting weather conditions. 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). This month experiences higher precipitation, with 131 mm (5.2 in) falling over about 10 days, while humidity sits at 74%. Conversely, January offers a chillier climate, with temperatures dipping as low as -5°C (22°F) and averaging only 4°C (39°F), peaking at 16°C (61°F). Precipitation is significantly lower in January at 35 mm (1.4 in) over just 5 days, although humidity is higher at 88%. For a more detailed look at January weather, check out Monza weather in January.

September and February present stark contrasts in weather patterns. In September, temperatures range from a minimum of 8°C (46°F) to a maximum of 32°C (89°F), with an average of 20°C (69°F). This month also sees higher precipitation, totaling 131 mm (5.2 in) over about 10 days, accompanied by a humidity level of 74%. Conversely, February experiences much cooler weather, with temperatures dropping to a minimum of -5°C (23°F) and peaking at 21°C (70°F), averaging around 7°C (44°F). Precipitation is significantly lower at 46 mm (1.8 in) over just 6 days, but humidity is slightly higher at 81%. For more specifics about weather in February, visit Monza weather in February.

September and March present contrasting weather patterns. In September, temperatures can range from a chill of 8°C (46°F) at night to a warm peak of 32°C (89°F) during the day, with an average of 20°C (69°F). The month is characterized by significant rainfall, totaling 131 mm (5.2 in) over about 10 days, and a high humidity level of 74%. In contrast, March is much cooler, with temperatures fluctuating between a minimum of -5°C (23°F) and a maximum of 24°C (76°F), averaging around 10°C (50°F). Precipitation is considerably less, at 74 mm (2.9 in) over 8 days, with a slightly higher humidity of 76%. For a more detailed look at March weather specifics, you can check Monza weather in March.

When comparing the weather in September and April, a stark contrast emerges. September boasts a warmer average temperature of 20°C (69°F), with highs reaching up to 32°C (89°F), while April's average is significantly cooler at 14°C (58°F) and peaks at 27°C (81°F). In terms of precipitation, September experiences more rainfall, totaling 131 mm (5.2 in) over 10 days, compared to April's 89 mm (3.5 in) over just 9 days. Humidity levels are similar, with September at 74% and April slightly higher at 77%. For more details on the weather in April, check out Monza weather in April.

September and May present a mix of warm temperatures and varying precipitation levels. In September, temperatures range 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 about 131 mm (5.2 in) of rain across 10 days. In contrast, May has slightly cooler temperatures, with a range from 5°C (42°F) to 34°C (93°F) and an average of 18°C (65°F). Although May sees a lower total precipitation of 120 mm (4.7 in), it is spread over 15 days, making it a wetter month overall. Both months share a humidity level of 74%, contributing to the warm and often muggy conditions. For more details on May weather, check Monza weather in May.

When comparing the weather in September and June, notable differences emerge in temperature and precipitation patterns. September experiences a more varied temperature range, with minimums dropping to 8°C (46°F) and maximums reaching up to 32°C (89°F). In contrast, June boasts warmer averages, with minimums of 13°C (56°F) and maximums soaring to 39°C (102°F). While September sees a higher total precipitation of 131 mm (5.2 in) over 10 days, June has slightly less rainfall at 120 mm (4.7 in) but over only 8 days, indicating a potential for drier stretches. Humidity levels are comparable, with September at 74% and June slightly lower at 71%. For a closer look at the specifics of June weather, you can check Monza weather in June.

In comparing the weather between September and July, notable differences emerge in both temperature and humidity. September tends to have lower temperatures, with a minimum of 8°C (46°F) and an average of 20°C (69°F), while July is significantly warmer, featuring a minimum of 15°C (59°F) and an average of 25°C (77°F). The maximum temperatures also reflect this trend, reaching up to 32°C (89°F) in September compared to a sweltering 36°C (98°F) in July. Despite similar precipitation levels, with September experiencing 131 mm over 10 days and July 131 mm over 12 days, the humidity is slightly higher in September at 74%, compared to July's 67%. For specific details on July's weather, you can refer to Monza weather in July.

In comparing the weather patterns of September and August, it becomes evident that September tends to be cooler and wetter. The minimum temperature in September dips to 8°C (46°F), contrasting with the warmer minimum of 14°C (58°F) recorded in August. While September has an average temperature of 20°C (69°F), August boasts a significantly higher average of 25°C (77°F) and also reaches a maximum of 36°C (98°F) compared to September's peak of 32°C (89°F). In terms of precipitation, September experiences more rain, totaling 131 mm (5.2 in) over 10 days, whereas August sees 101 mm (4.0 in) over 9 days. Furthermore, September's humidity averages around 74%, notably higher than August's 64%. For a more detailed look at August weather patterns, you can visit Monza weather in August.

September and October showcase a noticeable transition in weather patterns. In September, temperatures range from a mild 8°C (46°F) at night to a warm average of 20°C (69°F), peaking at a high of 32°C (89°F), accompanied by substantial rainfall of 131 mm (5.2 in) over about 10 days and a humidity level of 74%. By contrast, October brings cooler conditions, with temperatures dropping to a minimum of 4°C (40°F) and an average of 15°C (59°F), peaking at 28°C (83°F). Despite a decrease in overall precipitation to 103 mm (4.1 in) over 8 days, humidity levels rise to 87%, creating a noticeably more damp atmosphere. For more detailed insights, check this link: Monza weather in October.

September and November present distinctly different weather patterns. In September, temperatures range from a minimum of 8°C (46°F) to a warm average of 20°C (69°F), peaking at a maximum of 32°C (89°F), accompanied by moderate humidity at 74%. The month sees about 131 mm (5.2 in) of precipitation over 10 days, making it a transitional month towards the cooler seasons. In contrast, November marks a significant drop in temperatures, with a minimum of -2°C (29°F), an average of 10°C (49°F), and a maximum of 18°C (65°F). The month experiences higher humidity at 88% and more precipitation, totaling 149 mm (5.9 in) over 12 days, which can contribute to a damp, chilly atmosphere. For more detailed insights, you can refer to Monza weather in November.

September weather is characterized by warmer temperatures, with averages around 20°C (69°F) and highs reaching up to 32°C (89°F). This month experiences a fair amount of rainfall, totaling 131 mm (5.2 in) across approximately 10 days, and the humidity is relatively comfortable at 74%. In contrast, December brings a significant drop in temperatures, with averages around 5°C (41°F) and maximums capping at 15°C (59°F), while lows can plummet to -5°C (23°F). Precipitation decreases to 87 mm (3.4 in) over about 8 days, but the humidity climbs to 85%, making the air feel quite chilly. For more specific details on what to expect, you can refer to Monza weather in December.

Compare Monza's Climate with Cities Worldwide

Conclusion: What to Expect From September Weather in Monza

As summer transitions to autumn, September in Monza offers a delightful mix of warmth and mildness. With temperatures that can soar up to 32°C (89°F) during the day, the month showcases a striking contrast to the cooler, crisper days that follow. However, as nighttime sets in, a notable dip can bring temperatures down to a brisk 8°C (46°F), reminding visitors of the approaching fall season. Humidity levels remain relatively balanced at 74%, and rainfall is not uncommon, with about 10 days experiencing precipitation, totaling 131 mm (5.2 in). This blend of warmth, occasional rain, and fluctuating temperatures makes September a unique and vibrant time to explore Monza. For a deeper look at what to expect throughout the year, visit Monza Climate.