Last updated: March 24, 2025
September in San Gimignano, Italy brings a delightful transition towards autumn, characterized by a maximum temperature reaching 32°C (90°F) and a more comfortable average of 20°C (69°F). However, the month can also see lows dipping to 6°C (44°F). Expect around 100 mm (3.9 inches) of rainfall over 10 days, contributing to a humidity level of 66% that enhances the lush landscapes. This combination of warm days and refreshing evenings makes September a perfect time to explore the enchanting medieval architecture and picturesque surroundings of this historic Tuscan town.
In September, San Gimignano experiences a delightful transition from the heat of summer to the mildness of autumn. With minimum temperatures around 6°C (44°F) and daytime highs peaking at a comfortable 32°C (90°F), visitors can enjoy pleasant weather for exploring the town's charming medieval architecture and stunning vineyards. The average temperature settles at a pleasant 20°C (69°F), making it an ideal time for outdoor activities and soaking up the local culture. As the month progresses, the warmth gradually gives way to cooler evenings, hinting at the approaching fall. This perfect balance of warmth and coolness creates an enchanting atmosphere that captivates both tourists and locals alike.
In September, San Gimignano experiences a notable increase in precipitation, with an average of 100 mm (3.9 in) falling over approximately 10 days. This marks a significant uptick from the drier summer months of June, July, and August, where rainfall was notably lower, averaging around 37 mm (1.5 in). As the region transitions into autumn, this surge not only revitalizes the landscape but also sets the stage for the wetter months ahead, including October and November, which bring an average of 93 mm (3.6 in) and 141 mm (5.6 in), respectively. Thus, September acts as an essential bridge, ushering in the changing seasons with a refreshing wave of rainfall that nurtures the lush Tuscan hills.
In September, San Gimignano experiences a moderate rise in humidity, with levels reaching 66%. This slight increase follows a trend of steadily decreasing moisture levels throughout the summer months, where July and August boast the lowest humidity at 57% and 55% respectively. As autumn approaches, the humidity begins to climb again, reflecting the transition from the drier summer to the wetter fall months. By October, humidity spikes back up to 79%, indicating a return to the more humid conditions typical of San Gimignano's winter months. This seasonal fluctuation emphasizes the region's dynamic climate, where summer warmth gives way to the refreshing embrace of autumn's moisture.
As September arrives in San Gimignano, the UV Index reflects a transition towards milder sun exposure, registering a 7, which falls into the high exposure category. This shift allows for a burn time of around 25 minutes, offering a noticeable reprieve from the intense rays experienced during the peak summer months of June and July, where values soared to 10 and 9 respectively. While the days begin to shorten and the warmth of summer lingers, it remains essential to stay sun-smart, particularly as early autumn sunlight can still pose risks. Embracing the beauty of the Tuscan landscape, visitors should remain aware of the UV Index trends to enjoy their time safely outdoors. For more information, explore the detailed San Gimignano UV Index.
UV Risk Categories
As summer gracefully transitions into autumn, September in San Gimignano continues to bask in a warm embrace of sunshine, boasting an impressive 340 hours of daylight. This abundant sunlight reflects a gradual decline from the peak luminosity observed in the sun-soaked months of June and July, which recorded 420 and 433 hours respectively. Despite this decrease, September still shines brightly compared to the quieter months that follow, showcasing the region's charm as vineyards and olive groves prepare for harvest under the gentle warmth of early fall. With the crispness of October just around the corner, September offers the perfect backdrop for exploration and appreciation of Italy's enchanting landscapes.
In September, San Gimignano enjoys a relatively bright and sunny climate, boasting a 56% chance of sunshine. This marks a slight decline from the sun-drenched peak of August, which enjoys a robust 66% likelihood of clear skies. As summer transitions into fall, the sunny days gradually make way for cooler temperatures, reflecting a typical seasonal shift. This pattern emphasizes that while September continues to provide delightful weather for visitors, it’s a gentle reminder that autumn is on the horizon. Those planning a trip will appreciate the blend of warmth and sunshine, making it a charming time to explore this historic town.
In September, daylight in San Gimignano begins its gentle decline, offering approximately 12 hours of sunlight. This month marks a transition from the summer's peak, where July and August basked in 15 and 13 hours of daylight, respectively. As the vibrant hues of autumn approach, you can feel the shift as daylight starts tapering off towards the shorter days of fall. Following the long, sun-soaked days of summer, September still gifts visitors ample sunlight to explore the captivating beauty of the medieval town, while hinting at the cozy nights to come.
As summer gives way to autumn in San Gimignano, September brings a gentle shift in the atmosphere, with the average wind speed at a mild 1.9 m/s (4 mph). This slight decrease in breeze, compared to the slightly more active months of May through August, sets a tranquil scene in this enchanting Tuscan town. The winds, once more vigorous in earlier months, now carry a whisper of the changing season, hinting at the crispness that will soon arrive in October, where winds pick back up to 2.5 m/s (6 mph). Overall, September’s softer winds invite both locals and visitors to bask in the serene beauty of San Gimignano, making it an ideal time for leisurely strolls amidst its historic charm.
The weather in San Gimignano 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 Gimignano and find detailed weather information for every month.
September and January present vastly different weather patterns. In September, temperatures range from a mild 6°C (44°F) to a warm 32°C (90°F), with an average of 20°C (69°F). This month experiences about 100 mm (3.9 in) of rainfall over 10 days, while humidity sits at a comfortable 66%. In contrast, January is much colder, with temperatures dropping to a minimum of -6°C (22°F) and peaking at 15°C (59°F), averaging around 5°C (42°F). Precipitation decreases to 51 mm (2.0 in) over just 7 days, but the humidity rises significantly to 84%. For more detailed information, you can check the San Gimignano weather in January.
In September, temperatures are generally much warmer, with average highs reaching 32°C (90°F) and lows around 6°C (44°F), creating a pleasant summer atmosphere. The month sees about 100 mm (3.9 in) of precipitation over approximately 10 days, resulting in moderate humidity levels of 66%. In contrast, February presents a cooler climate with average temperatures ranging from a low of -5°C (24°F) to a high of 20°C (67°F). Here, the total precipitation is slightly lower at 76 mm (3.0 in) over 8 days, but the humidity is higher at 76%. For more detailed insights on February weather, you can visit San Gimignano weather in February.
In comparing the weather between September and March, notable differences in temperature and precipitation emerge. September enjoys a more temperate climate with average highs reaching 20°C (69°F) and a maximum of 32°C (90°F), while March is cooler, with an average temperature of 9°C (49°F) and maximums of 24°C (75°F). Precipitation is also lighter in March, totaling 64 mm (2.5 in) over 8 days compared to September's 100 mm (3.9 in) across 10 days. Both months experience similar humidity levels, with September at 66% and March slightly higher at 68%. For those interested in learning more about the weather specifics in March, you can explore San Gimignano weather in March.
When comparing the weather in September and April, there are notable differences in temperature and overall climate. September enjoys warmer conditions, with average highs reaching 32°C (90°F) compared to April's maximum of 26°C (79°F). While both months experience similar levels of precipitation—100 mm (3.9 in) in September and 86 mm (3.4 in) in April—September tends to be slightly wetter. April starts off cooler, with minimum temperatures dipping to -3°C (28°F) while maintaining higher humidity at 70% compared to September's 66%. For more detailed information, you can check out San Gimignano weather in April.
When comparing the weather in September and May, both months showcase mild temperatures, but September tends to be slightly warmer on average and can reach higher maximum temperatures. In September, temperatures range from a minimum of 6°C (44°F) to a maximum of 32°C (90°F), with an average of 20°C (69°F) and a humidity of 66%. In contrast, May sees slightly cooler temperatures, ranging from a minimum of 4°C (40°F) to a maximum of 31°C (89°F), with an average of 17°C (63°F) and a higher humidity of 69%. Precipitation is relatively close between the two months, with September experiencing 100 mm (3.9 in) over 10 days and May recording 93 mm (3.7 in) over 14 days. For more details, you can check San Gimignano weather in May.
September brings a more varied temperature range compared to June, with minimums dipping to 6°C (44°F) and maximums reaching up to 32°C (90°F). While the average temperature in September is 20°C (69°F), it is slightly lower than June's average of 22°C (71°F). Additionally, September experiences nearly double the precipitation, with 100 mm (3.9 in) over approximately 10 days, compared to June's 45 mm (1.8 in) across just 6 days, indicating a wetter month. Humidity levels are also slightly higher in September at 66%, compared to June's 62%. For a more detailed overview, you can check San Gimignano weather in June.
When comparing the weather in September to that of July, we can see distinct differences. September experiences a broader temperature range, with minimums dropping to 6°C (44°F) and maximums reaching 32°C (90°F), resulting in an average temperature of 20°C (69°F). In contrast, July has consistently warmer temperatures, with minimums of 14°C (57°F) and maximums soaring to 36°C (97°F), yielding an average of 24°C (76°F). Additionally, September is wetter, receiving 100 mm (3.9 in) of precipitation over 10 days compared to July's 41 mm (1.6 in) over just 6 days. The humidity in September is also higher at 66%, while July enjoys lower humidity levels at 57%. For more specifics about July's weather, you can check San Gimignano weather in July.
In comparing the weather of September and August, September tends to be cooler, with average temperatures ranging from a minimum of 6°C (44°F) to a maximum of 32°C (90°F), while August boasts warmer temperatures with a minimum of 12°C (55°F) and a peak of 36°C (98°F). September also experiences more precipitation, receiving about 100 mm (3.9 in) over 10 days, compared to August's lighter rainfall of 37 mm (1.5 in) across just 6 days. Additionally, humidity levels are higher in September at 66%, compared to 55% in August. For detailed weather insights, you can check San Gimignano weather in August.
September and October present a noticeable shift in weather patterns. In September, temperatures are generally warmer, with a minimum of 6°C (44°F) and an average high of 32°C (90°F), while October sees cooler temperatures, reaching a minimum of 4°C (39°F) and a maximum of 27°C (80°F). Additionally, the average temperature in October drops to 15°C (60°F), marking a significant transition to autumn. Precipitation levels are relatively similar, with September receiving 100 mm (3.9 in) over about 10 days compared to October's 93 mm (3.6 in) across 9 days, though October's increased humidity at 79% contributes to a different feel in the air. For more detailed insights, you can check San Gimignano weather in October.
September typically offers warmer temperatures, with an average of 20°C (68°F) and highs reaching up to 32°C (90°F), creating a pleasant environment for outdoor activities. In contrast, November brings cooler weather, with average temperatures dipping to 11°C (52°F) and nighttime lows dropping as low as -2°C (29°F). Additionally, November experiences higher precipitation levels, averaging 141 mm (5.6 in) over 15 days, compared to September's 100 mm (3.9 in) over 10 days. The humidity also rises in November, reaching 84%, making the air feel heavier. For more detailed information on November weather in the region, check out San Gimignano weather in November.
In September, the weather is characterized by warm temperatures, with an average of 20°C (69°F) and highs reaching up to 32°C (90°F), making it a pleasant month for outdoor activities. However, it also experiences moderate rainfall, averaging about 100 mm over 10 days, with humidity levels around 66%. In contrast, December brings a significant drop in temperature, with an average of just 7°C (44°F) and maximums capping at 16°C (62°F). This month is also marked by higher humidity at 83% and slightly more precipitation, totaling 117 mm over 13 days. For more details on the specific conditions, check out San Gimignano weather in December.
As summer gracefully transitions into autumn, September in San Gimignano offers a delightful blend of warmth and refreshment. The month typically showcases mild temperatures, with sunny days that can still reach around 32°C, creating an inviting atmosphere for visitors. Compared to the blistering heat of July and August, September’s average temperature of 20°C is much more comfortable. However, potential travelers should prepare for occasional rain, as the region experiences around 10 days of precipitation this month. The humidity, while still present, lingers at a moderate level, making it a perfect time to explore the town's renowned medieval architecture and stunning landscapes. For a comprehensive understanding of what to expect throughout the year, delve into the details in our article on San Gimignano Climate.