Last updated: March 24, 2025
In September, Florence, Italy experiences a delightful transition into autumn, with average temperatures hovering around 20°C (68°F). The month can bring maximum highs of 31°C (88°F), offering plenty of warm days, while cooler evenings dip to a refreshing 6°C (43°F). Rainfall is moderate, with 76 mm (3.0 in) spread across approximately 9 days, and humidity sits at a comfortable 66%. This combination makes September an ideal time to explore the city's rich history and vibrant culture, all while enjoying the mild, inviting weather.
As September unfolds in Florence, Italy, the city enjoys a delightful transition from the summer heat to the gentler embrace of autumn. With minimum temperatures around 6°C (43°F), the cooler evenings invite cozy gatherings, while daytime averages climb to a comfortable 20°C (68°F), perfect for exploring the rich history and stunning architecture. The maximum temperatures can still reach a warm 31°C (88°F), offering plenty of sunshine for outdoor adventures. This month strikes a harmonious balance, showcasing a gradual decline in the sweltering summer days of August and providing a refreshing backdrop for both locals and visitors to relish in Florence's vibrant atmosphere.
September in Florence marks a transition into the heart of autumn, with precipitation levels averaging 76 mm (3.0 in) across about 9 rainy days. This moderate rainfall signals a shift from the drier summer months, where July and August record merely 37 mm (1.5 in) and 31 mm (1.2 in) respectively. The increase in precipitation not only replenishes the landscape but also prepares it for the wetter months ahead. As the city experiences this subtle uptick, the shifting seasons paint a picturesque backdrop for visitors, combining the charm of Florence with the refreshing scent of rain, hinting at the more robust rains of October and November.
As September arrives in Florence, Italy, the summer's dry spell begins to wane, with humidity levels creeping up to 66%. This marks a slight increase from August's more arid 55%, signaling a transition into the more humid months of autumn. The steady rise in humidity from the peak summer months is accompanied by the vibrant colors of early fall, creating a picturesque backdrop for leisurely strolls through the city's historic streets. Looking ahead, humidity will continue to climb, reaching 79% in October, as the cooler temperatures of winter approach. This trend reflects Florence's seasonal rhythm, where the air retains lingering warmth while gradually inviting the crispness of fall.
In September, Florence experiences a UV Index of 7, placing it in the high exposure category. This means that while the sun's rays are still intense, the burn time extends to 25 minutes, offering a bit more leeway compared to the peak summer months. Following the exceptionally high indices of May through August, where the UV levels soared up to 10 and 9, September marks a notable decrease, but caution is still advised, especially around midday. As the seasons transition towards autumn, it's essential to remain mindful of the sun's potency during outdoor activities. For more details on the UV Index throughout the year, visit Florence UV Index.
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As summer wanes and autumn approaches, September in Florence still enjoys a generous 338 hours of sunshine, offering a beautiful transition from the sun-drenched days of July and August. While daylight hours decrease from the peak summer months, September retains a vibrant warmth that invites leisurely strolls through its historic streets and picturesque piazzas. This gradual decline continues into October, indicating that while the peak of summer may have passed, the charm of the Tuscan city remains bathed in golden light. With each passing month, visitors can witness the lovely balance of fading summer brilliance and the beginnings of fall, making Florence a captivating destination year-round.
September in Florence, Italy, shows a healthy likelihood of sunny weather, with a 56% chance of sunshine gracing the city. This month marks a transition as summer gives way to autumn, maintaining a relatively high chance of clear skies, especially when compared to the preceding months. After the warmth of July and August, which boast percentages of 60% and 63% respectively, September retains some of that sunny charm, offering a favorable environment for outdoor exploration. As the city prepares for the cooler October days with only a 44% chance of sun, September serves as a delightful bridge, inviting visitors to enjoy its historical beauty bathed in golden light.
As September graces Florence, the city experiences a gentle transition in daylight, basking in 12 hours of sunlight each day. This marks a gradual decrease from the sun-drenched 15 hours of July, reflecting the onset of autumn. While daylight begins to wane, it still offers a vibrant ambience for exploring the city's historic charm and picturesque landscapes. The rhythm of light and dark throughout the year highlights a clear pattern; as the summer months fade, Florence gracefully accommodates the changing season, inviting locals and visitors alike to savor its beauty in the golden hour glow that lingers a bit longer before the colder months ahead.
As September unfolds in Florence, Italy, the gentle whispers of the wind reflect a transition from the warmth of summer to the crispness of autumn. With an average wind speed of 1.8 m/s (4 mph), September stands out as one of the calmer months, especially following the mild breezes of August at 2.1 m/s (5 mph). This slight lull in the wind doesn’t diminish the charm of the city; rather, it enhances the experience of wandering through its historic streets, allowing visitors to savor the fading sunlight and vibrant foliage without the distractions of stronger gusts. As the city prepares for the cooler months ahead, the wind speeds begin to pick up again in October, hinting at the dynamic shifts that characterize Florence's seasons.
The weather in Florence 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 Florence and find detailed weather information for every month.
September and January present strikingly different weather patterns. In September, temperatures range from a mild 6°C (43°F) at night to a warm average of 20°C (68°F) and peaking at 31°C (88°F) during the day. This month sees about 76 mm (3.0 in) of precipitation over 9 days, with a moderate humidity level of 66%. In contrast, January is much colder, with temperatures dipping to a minimum of -6°C (21°F), averaging just 5°C (41°F), and reaching a maximum of 15°C (59°F). The overall precipitation is slightly lower at 59 mm (2.3 in), occurring over 8 days, but the humidity rises to a notable 84%. For more details about January's weather, you can check Florence weather in January.
September and February present stark contrasts in weather. September boasts a more temperate climate, with average temperatures ranging from a pleasant 6°C (43°F) to a warm 31°C (88°F) and a lower precipitation rate of 76 mm (3.0 in) over about nine days. The humidity level sits at 66%, making for relatively comfortable conditions.
In contrast, February experiences much cooler temperatures, with averages between -7°C (21°F) and 20°C (69°F). This month sees higher precipitation at 98 mm (3.9 in) over approximately twelve days, accompanied by increased humidity at 76%. For those interested in learning more about February weather, you can explore Florence weather in February.
September and March present a striking contrast in weather patterns. In September, temperatures range from a mild 6°C (43°F) at night to a warm 31°C (88°F) during the day, with an average temperature of 20°C (68°F). The month sees approximately 76 mm (3.0 in) of precipitation over about 9 days, while humidity hovers around 66%. In contrast, March experiences colder conditions, with temperatures dipping as low as -12°C (11°F) and peaking at 23°C (74°F), averaging 9°C (48°F). The precipitation levels are slightly higher, totaling 77 mm (3.0 in) over about 10 days, accompanied by a marginal increase in humidity at 68%. For more detailed insights on March weather, you can visit Florence weather in March.
In comparing the weather patterns of September and April, notable differences emerge. September tends to be warmer, with average temperatures ranging from a minimum of 6°C (43°F) to a maximum of 31°C (88°F), while April starts much cooler, experiencing minimums as low as -3°C (27°F) and maximums reaching 26°C (78°F). However, April has slightly higher precipitation, totaling 84 mm (3.3 in) over 10 days, compared to September’s 76 mm (3.0 in) across 9 days. Additionally, April has a higher humidity level at 70% versus September's 66%. For more detailed insights, you might explore Florence weather in April.
When comparing the weather in September and May, we see notable differences in temperature and precipitation patterns. September enjoys warmer average temperatures, ranging from a minimum of 6°C (43°F) to a maximum of 31°C (88°F), while May presents slightly cooler conditions, with temperatures from 4°C (40°F) to a maximum of 30°C (87°F). In terms of precipitation, May is wetter, receiving 99 mm (3.9 in) over 15 days compared to September's 76 mm (3.0 in) over just 9 days. Additionally, humidity levels are quite similar, with September averaging 66% and May slightly higher at 69%. For more specific details about the weather during this time, you can check Florence weather in May.
In June, the weather tends to be warmer, with average temperatures ranging from a minimum of 10°C (50°F) to a maximum of 35°C (96°F), and average humidity at 62%. By contrast, September sees a slight decrease in temperatures, with averages between 6°C (43°F) and 31°C (88°F) and an increase in humidity to 66%. Additionally, June experiences less precipitation, accumulating around 41 mm (1.6 in) over approximately 6 days, compared to September's 76 mm (3.0 in) spread over 9 days. For more information about the weather in Florence during June, you can visit Florence weather in June.
September weather shows a wider temperature range compared to July, with minimums dropping to 6°C (43°F) and maximums reaching 31°C (88°F). The average temperature in September is around 20°C (68°F), significantly cooler than July's average of 24°C (75°F), where temperatures can soar as high as 37°C (98°F). Additionally, September experiences more rainfall, with 76 mm (3.0 in) over 9 days, while July is relatively drier with only 37 mm (1.5 in) over 4 days. The humidity level is higher in September at 66%, compared to July's 57%. For more detailed insights into July's weather, you can visit Florence weather in July.
In comparing the weather of September and August, it is evident that September tends to experience cooler temperatures, with a minimum of 6°C (43°F) and an average of 20°C (68°F), contrasting sharply with August’s warmer minimum of 12°C (53°F) and an average of 24°C (76°F). The maximum temperatures also show a notable difference; September peaks at 31°C (88°F), while August can soar to a high of 36°C (96°F). Additionally, September receives more precipitation with 76 mm (3.0 in) over 9 days, compared to August's significantly lower 31 mm (1.2 in) over just 5 days. Humidity levels further distinguish the two months, with September averaging 66%, higher than August's 55%. For more details on August weather patterns, you can visit Florence weather in August.
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), making it a warmer month overall. The precipitation levels are moderate at 76 mm (3.0 in) over 9 days, with humidity sitting at 66%.
Conversely, October sees a drop in average temperatures, with a minimum of 4°C (39°F), an average of 15°C (59°F), and a maximum of 26°C (79°F). It also experiences slightly higher precipitation at 93 mm (3.7 in) over the same number of rainy days, coupled with increased humidity at 79%. For more detailed insights into October's weather, you can visit Florence weather in October.
September typically offers warmer weather compared to November, with temperatures ranging from a minimum of 6°C (43°F) to a maximum of 31°C (88°F), resulting in an average of 20°C (68°F). The month experiences moderate precipitation of 76 mm (3.0 in) over about 9 days and a humidity level of 66%. In contrast, November sees significantly cooler conditions, with temperatures dropping to a minimum of -1°C (30°F) and averaging just 10°C (51°F), peaking at 20°C (68°F). This month is also wetter, with 141 mm (5.5 in) of rain expected across approximately 12 days and higher humidity at 84%. For more details on the November weather in Florence, visit Florence weather in November.
When comparing the weather of September and December, significant contrasts emerge. September features warmer temperatures, with averages around 20°C (68°F) and maximums reaching 31°C (88°F), while December experiences much chillier conditions, with average temperatures dropping to 6°C (44°F) and maximums only reaching 16°C (61°F). Additionally, September has less precipitation, totaling 76 mm (3.0 in) over 9 rainy days, compared to December's 130 mm (5.1 in) spread over 14 days, indicating a wetter month. The humidity also increases from 66% in September to 83% in December, contributing to the overall damp and colder feel of the latter month. For more detailed insights, you can check this resource: Florence weather in December.
As summer gradually yields to autumn, September in Florence showcases a delightful transition in weather. While the month still enjoys warm temperatures, with highs reaching up to 31°C, the evenings cool down, offering a refreshing respite from the summer heat. With an average temperature of 20°C, this month strikes a lovely balance, allowing visitors to explore the city comfortably. Although rain is more common, with about 9 days of precipitation, the lush humidity at 66% adds to the city's enchanting atmosphere. September provides a unique blend of summer's warmth and autumn's crispness, making it an ideal time to experience the charm of Florence. For more detailed insights, check out Florence Climate.