September Weather in Fiesole, Italy

Last updated: March 24, 2025

In September, Fiesole, Italy experiences a delightful mix of summer warmth and early autumn chill. With maximum temperatures reaching 31°C (88°F) and an average around 20°C (68°F), it’s a perfect time for outdoor exploration. However, cooler nights can dip as low as 6°C (43°F), reminding visitors of the season's transition. Rainfall totals approximately 76 mm (3.0 in) over 9 days, adding a refreshing touch to the landscape. The humidity sits at a comfortable 66%, contributing to the vibrant beauty of this historic hillside town as it moves into fall.

September Temperature in Fiesole

As September arrives in Fiesole, Italy, the temperatures begin to mellow, offering a gentle transition from the summer heat. With minimums around 6°C (43°F) and averages settling at a comfortable 20°C (68°F), the month presents ideal conditions for exploration. The days, warmed by a maximum of 31°C (88°F), are still reminiscent of summer's warmth, inviting leisurely strolls through the picturesque landscapes. This comforting climate makes September one of the most delightful times to visit, showcasing the charm of Fiesole while avoiding the sweltering peaks of July and August. As autumn approaches, the temperatures will gradually dip, but for now, this month encapsulates a sweet spot of pleasant weather.

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

The chart illustrates September temperature patterns in Fiesole, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends.
JanFebMarAprMayJunJulAugSepOctNovDec414548546171757668595143
Data source: Temperature data for Fiesole generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

September Precipitation in Fiesole

September in Fiesole, Italy, unveils a transition into the autumn season, marked by a precipitation total of 76 mm (3.0 in) spread over 9 days. This rise in rainfall indicates a shift from the drier summer months of June, July, and August, which collectively averaged less than 38 mm (1.5 in) per month. As the landscape begins to change colors, September serves as a crucial link to October, which typically sees even more rainfall at 93 mm (3.7 in). This pattern reflects a noticeable increase in moisture as the year progresses, setting the stage for the lush, green vistas Fiesole is renowned for in the fall. With temperatures cooling and the frequent drizzles, September offers a refreshing contrast to the warmth of summer, making it an ideal time for picturesque strolls amidst the emerging autumn foliage.

September Precipitation Trends in Fiesole

The chart displays monthly precipitation patterns in Fiesole, 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.
JanFebMarAprMayJunJulAugSepOctNovDec599877841004137317693141130
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Fiesole

In September, Fiesole, Italy, experiences a notable shift in humidity levels, averaging 66%. This increase marks a transition from the low of 55% seen in August, as the summer heat begins to wane. While still relatively comfortable compared to the wetter winter months—such as January and November, which soar to 84%—September's humidity provides a refreshing balance that complements the mild weather. As the region heads toward autumn, this slight uptick hints at the cozy, cooler months ahead, setting the stage for a pleasant climate infused with the rich aromas of seasonal changes.

September Average Humidity in Fiesole

This chart illustrates the average monthly humidity levels in Fiesole, 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.
JanFebMarAprMayJunJulAugSepOctNovDec84%76%68%70%69%62%57%55%66%79%84%83%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Fiesole

As September rolls into Fiesole, Italy, the UV Index sees a notable decrease from the peak summer months, settling at 7, which places it in the high exposure category. This means sun seekers should be cautious, with a burn time of approximately 25 minutes without protection. Following the intense sunshine of July and August, September provides a slightly more temperate sun, yet the potential for skin damage remains significant. As the month progresses and autumn approaches, the UV Index will continue to decline, but for now, it's crucial to remain vigilant. For more details on UV trends throughout the year, visit Fiesole UV Index.

Maximum UV Index Levels in Fiesole for September

The chart shows the monthly maximum UV Index (UVI) for Fiesole 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.
JanFebMarAprMayJunJulAugSepOctNovDec2467810997532
Data source: Fiesole 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 Fiesole

As summer gracefully gives way to autumn, September in Fiesole, Italy, continues to bask in a generous 338 hours of sunshine. This robust figure reflects a slight decrease from the sun-drenched days of July and August, which boast peak hours at 432 and 401, respectively. Yet, September still holds its charm, providing an inviting atmosphere for visitors to explore the breathtaking Tuscan landscape. As the warmth lingers in the air, the daylight hours transition smoothly into October, marking the onset of cooler temperatures with 302 hours of sunlight. This seasonal shift not only enriches the scenery with vibrant fall colors but also extends the perfect opportunity for outdoor adventures, making September a delightful blend of summer's warmth and autumn's beauty.

Monthly Sunshine Duration in Fiesole: September Highlighted

The September sunshine duration represents the total number of hours Fiesole 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.
JanFebMarAprMayJunJulAugSepOctNovDec183h228h311h342h380h419h432h401h338h302h223h214h
Data source: Fiesole September Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Fiesole During September

In Fiesole, Italy, the likelihood of sunny weather in September is notably promising, with a 56% chance of sunshine. This positions September as one of the brighter months of the year, following the peak summer months of July and August, which boast chances of 60% and 63%, respectively. As the region transitions from the heat of summer to the cooler embrace of autumn, September maintains a respectable probability of clear skies, making it an inviting time for outdoor activities and exploration. This trend reflects a gradual decrease in sunshine as the year progresses, with the likelihood dipping in the subsequent months, emphasizing September as a delightful window for enjoying the Tuscan landscape bathed in sunlight.

Percentage of Sunny Days in September in Fiesole

The chart illustrates the percentage of sunny days in Fiesole 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 Fiesole experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec28%42%65%46%40%58%61%63%56%44%33%41%
Data source: Fiesole September chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Fiesole in September

As September graces Fiesole, Italy, the daylight begins to wane, offering 12 hours of sunshine—a gentle transition from the sun-drenched days of summer. Following the peak of 15 hours in June and July, the daylight gradually diminishes, reflecting the approach of autumn. While the days are still longer than in the chill of winter, with only 10 hours in October and descending to just 8 hours by December, September serves as a beautiful farewell to the warmth of summer. This month captures a delicate balance, where the golden hues of early autumn mingle with the lingering warmth of the sun, making it a delightful time for outdoor exploration and appreciation of Fiesole's picturesque landscape.

Average Daylight Hours in Fiesole for September

The chart illustrates the variation in daylight duration in Fiesole throughout the year, with September highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec9h 19m10h 29m11h 57m13h 27m14h 43m15h 22m15h 2m13h 54m12h 27m10h 58m9h 38m8h 58m
Data source: Fiesole daylight hours, calculated by summing the hours between sunrise and sunset for each day.

September Winds in Fiesole

As September unfolds in Fiesole, Italy, the gentle caress of the wind carries the whispers of summer fading into autumn. With an average wind speed of 1.8 m/s (4 mph), this month marks a notable dip from the breezier late spring and early summer months, where winds flirted at 2.6 m/s (6 mph). The decrease reflects a transition, where warm days gradually yield to cooler evenings. This softening of the breeze invites locals and visitors alike to savor the changing landscape, framed by the golden hues of fall, while the winds of October promise a revival as they pick up once more. The rhythm of Fiesole's climate showcases the subtle beauty of nature in transition, making September a perfect time for contemplation amidst the picturesque scenery.

Average September Wind Speed in Fiesole

The chart displays monthly wind speed patterns in Fiesole, 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.
JanFebMarAprMayJunJulAugSepOctNovDec2.52.32.32.32.61.72.02.11.8 m/s2.62.62.0
Data source: Fiesole September wind data, generated using information from the Copernicus Climate Change Service.

How September Weather in Fiesole Compares to Other Months

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

September and January present contrasting weather conditions. In September, temperatures typically range from a minimum of 6°C (43°F) to a maximum of 31°C (88°F), with an average of 20°C (68°F). The month sees about 76 mm (3.0 in) of precipitation over approximately 9 days, alongside a moderate humidity level of 66%. In contrast, January experiences much colder weather, with temperatures ranging from a low of -6°C (21°F) to a high of 15°C (59°F), averaging just 5°C (41°F). This winter month has slightly less precipitation at 59 mm (2.3 in) over about 8 days, but the humidity is noticeably higher at 84%. For a detailed look at the weather in January, check out Fiesole weather in January.

September and February present quite contrasting weather conditions. In September, temperatures range from a pleasant minimum of 6°C (43°F) to a warm maximum of 31°C (88°F), with an average of 20°C (68°F), creating a comfortable atmosphere for outdoor activities. The month experiences about 76 mm (3.0 in) of precipitation over 9 days, accompanied by a humidity level of 66%. Conversely, February brings much colder temperatures, with a minimum of -7°C (21°F) and a maximum of 20°C (69°F), averaging only 7°C (45°F). This winter month sees more rainfall, totaling 98 mm (3.9 in) over 12 days, and higher humidity at 76%. For a closer look at February weather, you can check Fiesole weather in February.

September and March present contrasting weather patterns. In September, the temperatures range from a cool 6°C (43°F) to a warm 31°C (88°F), with an average of 20°C (68°F). This month sees around 76 mm (3.0 in) of precipitation across approximately 9 days, contributing to a moderate humidity level of 66%. In contrast, March experiences a colder climate, with temperatures fluctuating from a chilly -12°C (11°F) to a mild 23°C (74°F) and an average of only 9°C (48°F). Similar to September, it also receives about 77 mm (3.0 in) of precipitation over 10 days, but the humidity is slightly higher at 68%. For more details on March weather specifics, visit Fiesole weather in March.

In comparing the weather of September and April, we see distinct contrasts in temperature and precipitation. September enjoys warmer averages, with minimums around 6°C and highs peaking at 31°C, while April experiences cooler temperatures, ranging from a low of -3°C to a maximum of 26°C. In terms of precipitation, September has slightly less rainfall at 76 mm over 9 days compared to April's 84 mm over 10 days, highlighting that April is typically a wetter month. Despite this, both months feature moderate humidity levels of around 66% in September and 70% in April. For those interested in more specifics about April's climate, you can check Fiesole weather in April.

When comparing the weather in September and May, notable differences emerge in temperature, precipitation, and humidity levels. September tends to feature warmer temperatures, with an average of 20°C (68°F) and maximum highs reaching 31°C (88°F), while May is cooler, averaging 16°C (62°F) and peaking at 30°C (87°F). In terms of precipitation, May experiences more rainfall, with 99 mm (3.9 in) over 15 days compared to September's 76 mm (3.0 in) over 9 days. Additionally, the humidity levels are slightly higher in May at 69%, compared to September's 66%. For more details on the weather patterns, you can visit Fiesole weather in May.

In comparing the weather of September and June, we see some distinct differences. September experiences a broader temperature range, with minimums dipping to 6°C (43°F) and maximums reaching up to 31°C (88°F), while the average temperature is slightly lower at 20°C (68°F). In contrast, June generally enjoys milder conditions with minimum temperatures of 10°C (50°F) and maximums soaring to 35°C (96°F), averaging around 22°C (71°F). Additionally, September tends to be wetter, with 76 mm (3.0 in) of rainfall over 9 days compared to June's 41 mm (1.6 in) over just 6 days. Humidity levels also vary slightly, with September at 66% and June at 62%. For more detailed information about June weather, you can check Fiesole weather in June.

In comparing the weather of September and July, we find notable differences in temperature and precipitation. July typically enjoys warmer temperatures, with a minimum of 12°C (54°F), an average of 24°C (75°F), and a maximum reaching 37°C (98°F). In contrast, September features a wider range, with minimums dipping to 6°C (43°F) and maximums peaking at 31°C (88°F), averaging around 20°C (68°F). Additionally, September experiences more rainfall, with 76 mm (3.0 in) over 9 days, compared to July's 37 mm (1.5 in) over just 4 days. The humidity also varies, being higher in September at 66% versus July's 57%. For more detailed information on July weather in Fiesole, you can check Fiesole weather in July.

When comparing the weather in September to August, it is evident that September experiences cooler temperatures and slightly higher humidity levels. In September, the minimum temperature drops to 6°C (43°F), with an average of 20°C (68°F) and a maximum of 31°C (88°F), while August boasts warmer conditions with a minimum of 12°C (53°F), averaging 24°C (76°F) and peaking at 36°C (96°F). Additionally, September records more precipitation, totaling 76 mm (3.0 in) over 9 days, compared to August's 31 mm (1.2 in) spread over just 5 days. For more details, you can check Fiesole weather in August.

September and October exhibit notable differences in weather patterns. In September, temperatures range from a minimum of 6°C (43°F) to a maximum of 31°C (88°F), with an average of 20°C (68°F), making it generally warmer. However, by October, the temperatures drop, presenting a minimum of 4°C (39°F) and a maximum of 26°C (79°F), resulting in a cooler average of 15°C (59°F). Precipitation also increases slightly from 76 mm (3.0 in) over 9 days in September to 93 mm (3.7 in) across the same number of days in October, accompanied by a rise in humidity from 66% to 79%. For more detailed information, visit Fiesole weather in October.

September and November offer distinctly different weather experiences. In September, temperatures are warm with a minimum of 6°C (43°F) and an average of 20°C (68°F), reaching a maximum of 31°C (88°F). The month typically sees 76 mm (3.0 in) of precipitation over about 9 days, with humidity at 66%. In contrast, November brings cooler conditions, with temperatures ranging from a minimum of -1°C (30°F) to an average of 10°C (51°F), and a maximum of 20°C (68°F). This month is also wetter, featuring 141 mm (5.5 in) of rain across 12 days and a higher humidity level of 84%. For more detailed information, you can check out Fiesole weather in November.

In September, the weather is noticeably warmer, with average temperatures around 20°C (68°F) and daytime highs reaching up to 31°C (88°F). With 76 mm (3.0 in) of precipitation over 9 days and a humidity level of 66%, it still feels quite pleasant, though a few rainy days can be expected. By contrast, December brings a significant drop in temperatures, with average temperatures falling to around 6°C (44°F) and maximums of only 16°C (61°F). The month experiences heavier rainfall, totaling 130 mm (5.1 in) over 14 days, along with increased humidity at 83%. For more details about the weather during this winter month, you can visit Fiesole weather in December.

Compare Fiesole's Climate with Cities Worldwide

Conclusion: What to Expect From September Weather in Fiesole

As summer transitions to fall, September in Fiesole offers a delightful mix of warmth and cooler breezes, distinguishing it from the hotter months that precede it. With temperatures reaching a pleasant maximum of 31°C (88°F) and an average comfortable 20°C (68°F), visitors can enjoy the outdoors without the sweltering heat of July and August. While the month does bring a bit more rain, with 76 mm (3.0 in) spread across nine days, this contributes to the lush landscapes that characterize the region. The 66% humidity adds a layer of mildness that ensures a refreshing experience. For those considering a visit, September's unique climate makes it an ideal time to explore Fiesole's historical charm and breathtaking views. For more insights, visit Fiesole Climate.