Last updated: March 24, 2025
September in San Leo, Italy is characterized by warm temperatures with a maximum reaching 32°C (90°F) and an average of 19°C (67°F), creating a pleasant atmosphere for outdoor activities. The month experiences occasional rainfall, accumulating around 96 mm (3.8 in) over approximately 10 days, adding a refreshing touch to the landscape. Humidity levels hover around 66%, contributing to a comfortable climate, ideal for exploring this historic town. Whether you're wandering through the medieval streets or enjoying the picturesque views, September offers a delightful blend of warmth and occasional breezes in San Leo.
As September unfolds in San Leo, Italy, temperatures begin to signal the transition from the sweltering summer months to the crispness of autumn. With a minimum of 6°C (43°F) and a comfortable average of 19°C (67°F), the town experiences a delightful warmth that's perfect for exploring its stunning landscapes. By day, you can expect highs reaching 32°C (90°F), inviting leisurely strolls through its historic streets and vibrant scenery. As autumn approaches, the weather becomes increasingly mild, offering a charming blend of summer's warmth and the refreshing hints of fall. This month beautifully encapsulates the fading heat of summer while laying the groundwork for the cooler months ahead.
In September, San Leo experiences a notable uptick in rainfall, recording 96 mm (3.8 in) over approximately 10 days of precipitation. This increase reflects a transition into the wetter fall season, as the month sees a significant rise from the drier summer months, where August brought only 57 mm. With sporadic showers and increased cloud cover, September's weather sets the stage for the lush greenery that follows. This pattern of higher precipitation is consistent with the trend observed in the preceding months, suggesting that while summer may linger, autumn's embrace is just around the corner, promising rejuvenation for the landscape.
In September, San Leo, Italy experiences a notable shift as humidity rises to 66%, marking a transition from the drier summer months of June, July, and August. This increase reflects a gradual return to the more humid conditions typical of the fall season, where the humidity levels consistently climb again, peaking in October at 79%. The trend shows that while summer brings comfortable warmth with lower humidity, autumn ushers in a dampness that can invigorate the landscape, preparing it for the cooler months ahead. Overall, the humidity pattern in San Leo illustrates a clear seasonal rhythm, with heightened moisture content as the year draws to a close.
In September, San Leo, Italy, experiences a high UV Index of 7, indicating that while the sun's rays can be intense, the burn time is a more manageable 25 minutes. This marks a transition from the peak summer months, where the UV Index reached a maximum of 9 in July and June, emphasizing the need for skin protection even as temperatures begin to cool. As autumn approaches, the UV Index subsequently decreases in October to a moderate 5, but September’s notable level still calls for caution, especially during midday outings. Visitors and residents should remain mindful of the sun’s strength during this time, underscoring the necessity to stay protected while enjoying the beautiful early fall days. For more detailed information, check out San Leo UV Index.
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In September, San Leo basks in a delightful 339 hours of sunshine, signaling the gentle transition from the vibrant summer months. This anticipated dip follows the sun-drenched peak of July and August, where residents and visitors enjoyed an impressive 429 and 400 hours respectively. The trend shows a steady buildup of brightness from the dismal days of January at just 184 hours to the glorious hours of May and June, averaging over 400 hours. As autumn approaches, although sunshine begins to diminish, September still offers a generous slice of summer warmth before the cooler October days, reflecting a season that gracefully blends the vitality of summer with the tranquility of fall.
In September, San Leo, Italy, enjoys a comforting 54% chance of sunny weather, marking a lovely transition from the summer months. This slight dip from the peak August sunshine, which boasts a 62% chance, aligns with a gradual cool-down as autumn approaches. The trend reveals that while early fall offers ample sunshine, it is still moderated compared to the sun-drenched heights of June and July. As residents and visitors take in the mild weather, September presents a splendid opportunity to explore the picturesque landscapes of this historic town, bathed in soft sunlight as the vibrant colors of fall begin to emerge.
In September, San Leo experiences a gentle transition in daylight duration, offering about 12 hours of sunlight—slightly less than the vibrant 13 hours of August. This gradual decline marks the beginning of autumn, as daylight hours steadily decrease from the high of 15 hours in the peak summer months of June and July. The evolving light patterns reflect the changing season, making September a beautiful time to enjoy the soft glow of the setting sun against the picturesque landscapes of this charming Italian town. As the days shorten, the allure of San Leo’s historic sites under the warm September sun invites both locals and visitors to relish the last vestiges of summer before the cooler months settle in.
As summer gives way to autumn in San Leo, September greets us with a gentle whisper of 1.8 m/s (4 mph) winds, marking the calmest month of the year. This delightful drop in wind speed contrasts sharply with the early summer months, where a slight uptick was felt. From a high of 3.2 m/s (7 mph) in May, the winds gradually eased, creating an almost serene atmosphere ideal for leisurely strolls through the charming streets. Following September, the wind picks up again in October, returning to a more moderate 2.5 m/s (6 mph). This trend of fluctuating wind speeds not only creates a pleasant climate but also adds to the enchanting ambiance of San Leo, inviting both locals and visitors to revel in the beauty of the changing seasons.
The weather in San Leo 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 Leo and find detailed weather information for every month.
September weather is characterized by warmer temperatures, with average highs reaching 32°C (90°F) and low humidity at 66%. The month sees a mix of sunny days with occasional rainfall, with about 96 mm (3.8 in) of precipitation over approximately 10 days. In contrast, January experiences much colder temperatures, with averages hovering around 4°C (40°F) and nighttime lows dipping to -7°C (20°F). The winter month is drier, with only 42 mm (1.7 in) of precipitation over about 6 days, but the humidity is higher at 84%. For more detailed insights on January weather, you can visit San Leo weather in January.
September and February showcase distinctly different weather patterns. In September, temperatures range from a mild 6°C (43°F) at night to a warm 32°C (90°F) during the day, with an average of 19°C (67°F). The month sees around 96 mm (3.8 in) of precipitation over approximately 10 days, accompanied by a humidity level of 66%. In contrast, February experiences much colder conditions, with nighttime lows plunging to -9°C (17°F) and daytime highs reaching only 18°C (65°F), averaging 7°C (45°F). Precipitation is slightly lower at 85 mm (3.3 in) over 9 days, and the humidity increases to 76%. For more detailed insights on February weather, you can refer to San Leo weather in February.
In comparing the weather of September and March, a stark contrast emerges in both temperature and conditions. September boasts a warm average temperature of 19°C (67°F) with maximums reaching up to 32°C (90°F), while March experiences much cooler averages, peaking at only 21°C (70°F) and dipping to a minimum of -12°C (11°F). Additionally, September typically sees higher precipitation levels at 96 mm (3.8 in) over about 10 days, compared to March’s 64 mm (2.5 in) across 8 days. Both months have similar humidity levels, with September at 66% and March slightly higher at 68%. For more detailed insights into March’s weather, check out San Leo weather in March.
September and April present contrasting weather patterns, showcasing the transition from summer to autumn and winter to spring, respectively. In September, temperatures range from a cool 6°C (43°F) at night to a warm 32°C (90°F) during the day, with an average of 19°C (67°F). This month sees a higher level of humidity at 66% and experiences around 96 mm (3.8 in) of precipitation over 10 days. In comparison, April features a lower temperature range, with nighttime lows dropping to -2°C (28°F) and daytime highs reaching 26°C (78°F), averaging 12°C (54°F). It is also characterized by slightly less rainfall, totaling 65 mm (2.5 in) over 9 days, and a higher humidity level of 70%. For more details, you can explore San Leo weather in April.
In September, temperatures range from a minimum of 6°C (43°F) to a maximum of 32°C (90°F), with an average of 19°C (67°F). The month experiences about 96 mm (3.8 in) of precipitation over 10 days and has a relative humidity of 66%. In contrast, May sees slightly cooler temperatures, with a minimum of 5°C (41°F) and a maximum of 29°C (85°F), averaging around 17°C (62°F). This month also tends to be wetter, receiving 106 mm (4.2 in) of precipitation across 14 days, with a higher humidity level of 69%. For more details on May weather, you can explore San Leo weather in May.
In comparing the weather of September and June, September tends to feature a broader temperature range, with minimums dropping to 6°C (43°F) and maximums reaching up to 32°C (90°F), while June maintains a milder temperature profile, with lows of 10°C (50°F) and highs of 35°C (94°F). The average temperature in June is slightly higher at 22°C (72°F) compared to September's 19°C (67°F). Additionally, September experiences more precipitation, totaling 96 mm (3.8 in) over 10 days, compared to June's 51 mm (2.0 in) over just 7 days. Humidity levels are also a bit higher in September at 66%, compared to June's 62%. For more details, check out San Leo weather in June.
When comparing the weather in July and September, notable differences emerge. July typically boasts warmer temperatures, with a minimum of 14°C (57°F) and an average of 24°C (76°F), reaching a peak of 35°C (95°F). In contrast, September experiences a broader temperature range, starting from 6°C (43°F) and averaging 19°C (67°F), while maxing out at 32°C (90°F). Precipitation is more frequent in September, with 96 mm (3.8 in) of rain over 10 days compared to July's 63 mm (2.5 in) over just 8 days. Additionally, the humidity in September is higher at 66%, compared to July's 57%. For further insights, you can check San Leo 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 (43°F) to a maximum of 32°C (90°F), while August is significantly warmer, with average temperatures ranging from a minimum of 12°C (53°F) to a maximum of 38°C (101°F). Additionally, September sees more precipitation, totaling 96 mm (3.8 in) across approximately 10 days, compared to August's 57 mm (2.2 in) over 8 days. Furthermore, September's humidity is higher at 66%, while August experiences a lower humidity level of 55%. For more detailed information, you can check San Leo weather in August.
In September, temperatures range from a minimum of 6°C (43°F) to a maximum of 32°C (90°F), with an average of 19°C (67°F). The month sees about 96 mm (3.8 in) of precipitation over 10 days, accompanied by a humidity level of 66%. In contrast, October experiences cooler temperatures, with a minimum of 5°C (41°F), an average of 14°C (58°F), and a maximum of 27°C (81°F). Precipitation decreases slightly to 85 mm (3.4 in) over 8 days, but humidity rises to 79%. For more detailed information, check San Leo weather in October.
In September, the weather is warm and relatively pleasant, with temperatures ranging from a minimum of 6°C (43°F) to a maximum of 32°C (90°F). The average temperature sits at a comfortable 19°C (67°F), accompanied by moderate rainfall of 96 mm (3.8 in) over about 10 days. Humidity is at 66%, making for a vibrant early autumn atmosphere.
In contrast, November brings a significant chill, with temperatures dipping to a minimum of -1°C (30°F) and an average of 10°C (51°F). The maximum in November reaches 20°C (67°F), but the overall feel is much cooler. Precipitation slightly increases to 104 mm (4.1 in) over 12 days, and humidity rises to 84%, giving November its characteristic damp and chilly climate. For more insights, you can check San Leo weather in November.
In September, the weather is warm and variable, with temperatures ranging from a minimum of 6°C (43°F) to a maximum of 32°C (90°F) and an average of 19°C (67°F). The month sees about 96 mm (3.8 in) of precipitation spread over 10 days, with humidity levels at 66%. In contrast, December brings much cooler temperatures, with a minimum of -5°C (23°F), an average of 6°C (43°F), and a maximum of 17°C (62°F). While precipitation decreases slightly to 78 mm (3.1 in) over 11 days, humidity rises to 83%. For more specific details on December's climate, you can visit San Leo weather in December.
As September unfolds in San Leo, the weather begins to transition from the warm embrace of summer to the cooler caress of autumn. With an average temperature that hovers around a comfortable 19°C, the days offer a pleasant respite from the peak summer heat, contrasting sharply with the high temperatures of July and August. However, September also brings about a noticeable uptick in precipitation, with rain gracing the landscape on approximately 10 days throughout the month. This increased moisture, combined with a humidity level of 66%, creates a lush environment that sets the stage for stunning fall colors. To learn more about the unique climate of this enchanting Italian town, visit San Leo Climate.