Last updated: March 24, 2025
Siena, Italy, in October offers a mild and charming climate, characterized by an impressive maximum temperature of 27°C (81°F) and a refreshing average temperature of 15°C (59°F). As the month progresses, temperatures can dip as low as 5°C (40°F) during the nights, making it perfect for cozy evenings. While visitors can expect some rainfall, with a total of 91 mm (3.6 in) spread over approximately 8 days, the air is filled with a delightful 79% humidity that enhances the vibrant autumn atmosphere. This combination of pleasant temperatures and scenic beauty invites exploration of the city’s rich history and stunning landscapes.
In October, Siena experiences a pleasant transition into autumn, with temperatures showcasing a gentle decline as the month progresses. The minimum temperature hovers around 5°C (40°F), while the average climbs to a comfortable 15°C (59°F), peaking at a delightful 27°C (81°F) on warmer days. This period marks a shift from the summer's lingering warmth, inviting visitors to enjoy the city's stunning fall foliage and cultural events without the crowds of peak tourist season. As evenings draw in, the crisp air hints at the forthcoming winter, making October an ideal time to savor Siena’s rich history and culinary delights amidst a backdrop of vibrant autumnal hues.
In October, Siena experiences a notable shift in precipitation, with an average of 91 mm (3.6 in), mirroring the rainiest months like May and surpassing the average of the preceding summer months. This trend marks October as a time of transition, where the gentle autumn rains begin to set the stage for the wetter winter ahead. Over an average of 8 rainy days, the city welcomes the change in weather, contributing to the vibrant hues of fall foliage that adorn the Tuscan landscape. As the rainfall increases, so does the beauty of Siena, enveloping the historic city in a serene, refreshing atmosphere that prepares it for the chillier months to come.
In October, Siena experiences a noticeable uptick in humidity, rising to 79% after a relatively dry summer. This shift marks a transition from the warm, arid months of July and August, where humidity levels were at their lowest, hovering around 55%. As autumn descends, October offers a refreshing change, bringing wetter conditions that invigorate the landscape. This pattern continues into the winter months, with humidity peaking again at 84% in November, suggesting a cyclical rhythm in Siena's climate. The rising humidity not only enhances the town's picturesque charm but also prepares the environment for the seasonal rains that are characteristic of the region.
As October rolls into Siena, Italy, the UV Index sits at a moderate 5, signaling a shift from the high peaks of summer. This decline reflects the transition from the sweltering heights of summer’s 10, experienced in June and July, and the very high exposure levels that dominated the previous months. With a burn time of 30 minutes, it's still important to be mindful of sun exposure. This trend makes October an ideal time for outdoor exploration, as the weather remains pleasant, but protective measures should still be considered. For a detailed understanding of UV exposure throughout the year, visit Siena UV Index.
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As autumn unfolds in Siena, Italy, October enjoys a splendid transition, showcasing 304 hours of sunshine—a delightful glow that encapsulates the essence of the season. Following the sun-drenched summer months that peak in July with an impressive 432 hours, daylight begins to wane, but not without charm. September continues to bask in warmth with 335 hours, hinting at the lingering beauty of the late summer. Despite the decrease, October's radiant afternoons linger, offering enough light for strolls through the historic streets and the vibrant autumnal colors that blanket the landscape. This gradual dimming leads into the lower sunlit days of November, standing as a reminder of the vibrant energy that filled the summer, making October a charming prelude to the upcoming winter months.
In Siena, Italy, October presents a moderate chance of sunny weather with a likelihood of 43%. As the autumn season unfolds, this marks a decline from the peak summer months, where sunshine probabilities soar to 66% in August and 64% in July. Interestingly, October's sunshine potential aligns closely with the transitional September, which enjoys a still respectable 55% chance. While the days grow shorter and cooler, October maintains a gentle balance of sunny intervals, making it a delightful time for exploring the city's historic charm amid the vibrant autumn foliage. However, as the month progresses, it becomes wise to prepare for the possibility of cloudier skies, especially with November's forecast dipping to 32%.
As October unfolds in Siena, Italy, the days begin to shorten, offering a blend of autumn's crispness and lingering light. With an average of 10 hours of daylight, October reflects a gradual descent from the summer's long, sun-drenched days, peaking at 15 hours in June, to the more muted light of winter. This month's daylight mirrors the rhythms of nature, following a consistent trend where daylight increases from January through June, peaks mid-year, and then gently wanes into the colder months. As Siena prepares for the cozy embrace of November, the shifting light invites residents and visitors alike to savor the rich hues of the season, embracing the beauty of shorter days intertwined with leisurely evenings.
As October unfolds in Siena, Italy, the landscape dances to the rhythm of a brisk average wind speed of 2.7 m/s (6 mph), mirroring the winds of January and bringing a refreshing embrace to the autumn air. Following a trend of decreasing winds throughout the hotter months, the return to a slightly heightened breeze in October signifies a transition into the cooler seasons. This invigorating wind complements the vibrant hues of autumn foliage, making it a splendid time for leisurely strolls through the historic streets. As the year draws to a close, the winds remain consistently pleasant, reminding locals and visitors alike of the enchanting atmosphere that defines this charming Tuscan city.
The weather in Siena changes throughout the year, offering a unique experience in each season. Below is a month-by-month comparison of October's weather with other months, highlighting differences in temperature, precipitation, and other key factors. Click on each section to discover seasonal trends in Siena and find detailed weather information for every month.
October and January present markedly different weather patterns. In October, temperatures range from a mild 5°C (40°F) at night to a warm 27°C (81°F) during the day, with an average of 15°C (59°F) and higher humidity at 79%. Precipitation is also higher in October, with 91 mm (3.6 in) spread over approximately eight days. In contrast, January experiences much colder conditions, with minimum temperatures dropping to -5°C (23°F) and an average of only 5°C (41°F). The maximum temperature of 15°C (59°F) is significantly lower than October's highs, while precipitation decreases to 44 mm (1.7 in) over about seven days, with humidity slightly higher at 84%. For those seeking detailed insights into January weather, you can find more information here: Siena weather in January.
October and February present notably contrasting weather conditions. In October, temperatures range from a minimum of 5°C (40°F) to a pleasant average of 15°C (59°F), peaking at 27°C (81°F), while February features cooler temperatures, with a minimum of -5°C (23°F) and an average of only 7°C (46°F), reaching a maximum of 20°C (68°F). Precipitation is more abundant in October, totaling 91 mm (3.6 in) over about 8 days, compared to February's 68 mm (2.7 in) across the same number of days. Additionally, October has a slightly higher humidity level at 79%, while February maintains a more crisp humidity of 76%. For a closer look at February's weather, you can check out Siena weather in February.
October and March present distinct weather patterns, showcasing the transition between summer and winter. October, with average temperatures ranging from a minimum of 5°C (40°F) to a maximum of 27°C (81°F), offers a mild climate with higher humidity at 79% and more precipitation, totaling 91 mm (3.6 in) over 8 days. In contrast, March experiences cooler temperatures, peaking at a maximum of 23°C (73°F) but dipping down to -11°C (12°F) at night, and lower humidity at 68%. Additionally, February sees less rainfall, with 61 mm (2.4 in) also spread over 8 days. For more insights into March weather, you can visit Siena weather in March.
In October, the weather brings milder temperatures, with an average of 15°C (59°F) and maximums reaching up to 27°C (81°F), creating a comfortable atmosphere for outdoor activities. In contrast, April sees cooler conditions, with average temperatures at 12°C (55°F) and minimums dipping to -3°C (27°F), making it feel quite brisk. Both months experience a notable amount of precipitation, with October receiving 91 mm (3.6 in) and April a slightly lower 81 mm (3.2 in), though April has a higher number of rainy days at 10 compared to October's 8. The humidity levels are also higher in October at 79%, compared to April's 70%, which may contribute to a more refreshing feel during the spring month. For more detailed insights, check out Siena weather in April.
October and May both feature similar levels of precipitation, each receiving about 91 mm (3.6 in), but the distribution of rain and overall temperatures differ significantly. October tends to have milder temperatures, with a minimum of 5°C (40°F), an average of 15°C (59°F), and a maximum of 27°C (81°F). In contrast, May starts off slightly cooler with a minimum of 3°C (37°F) but can warm up significantly, reaching a maximum of 31°C (89°F). Additionally, October experiences higher humidity at 79%, while May has a more comfortable humidity level of 69%, making the latter month generally feel more pleasant. For a detailed look at May's weather, check out Siena weather in May.
In comparing the weather in October and June, October experiences a broader range of temperatures, with minimums around 5°C (40°F) and maximums reaching up to 27°C (81°F). The average temperature is cooler at 15°C (59°F) compared to June, where minimums are higher at 9°C (49°F) and maximums soaring to 36°C (96°F), giving an average of 22°C (71°F). Precipitation is also more pronounced in October, with 91 mm (3.6 in) over roughly 8 days, as opposed to June's lighter rainfall of 38 mm (1.5 in) occurring over 6 days. Additionally, October's humidity is significantly higher at 79%, while June maintains a more comfortable 62%. For a closer look at June's weather, you can refer to Siena weather in June.
The weather in October presents a more temperate experience compared to the warmer July months. In October, temperatures range from a minimum of 5°C (40°F) to a maximum of 27°C (81°F), with an average of 15°C (59°F). This month sees about 91 mm (3.6 in) of precipitation over roughly 8 days, along with higher humidity at 79%. In contrast, July boasts warmer conditions, with temperatures ranging from a minimum of 13°C (56°F) to a scorching maximum of 36°C (97°F), averaging 24°C (76°F). This month experiences only 38 mm (1.5 in) of rain spread over 6 days and lower humidity at 57%. For more detailed insights, refer to Siena weather in July.
In October, the weather tends to be much cooler compared to August, with average temperatures ranging from a minimum of 5°C (40°F) to a maximum of 27°C (81°F), while August boasts a warmer climate with average temperatures between 12°C (53°F) and 37°C (99°F). Additionally, October experiences higher humidity levels at 79%, compared to August's more comfortable 55%. Precipitation also differs significantly; October sees about 91 mm (3.6 in) over 8 days, while August has lighter rainfall, with only 34 mm (1.3 in) spread over approximately 5 days. For more insights on the weather in August, you can check out Siena weather in August.
In comparing the weather of October to September, October presents cooler temperatures overall, with a minimum of 5°C (40°F) and an average of 15°C (59°F), compared to September's minimum of 7°C (45°F) and an average of 20°C (69°F). The maximum temperatures also drop significantly, from September's high of 32°C (90°F) to October's peak of 27°C (81°F). While precipitation levels are slightly higher in October at 91 mm (3.6 in) over 8 days, September records a comparable amount of 84 mm (3.3 in) over 9 days, accompanied by a lower humidity level of 66% versus October's 79%. This shift indicates a transition into a more autumnal climate. For more detailed information, please refer to Siena weather in September.
October and November offer a noticeable shift in weather patterns as autumn progresses. In October, temperatures range from a minimum of 5°C (40°F) to a comfortable average of 15°C (59°F) and can peak at 27°C (81°F), making it a relatively warm month with 91 mm (3.6 in) of precipitation over about 8 days. By contrast, November brings cooler conditions, with temperatures dipping as low as -3°C (27°F) and averaging around 11°C (51°F), while highs reach only 19°C (66°F). The month is also wetter, receiving 148 mm (5.8 in) of rain spread over approximately 15 days, alongside slightly higher humidity at 84%. For a closer look at what to expect, check out Siena weather in November.
October and December present quite contrasting weather conditions. In October, temperatures range from a minimum of 5°C (40°F) to a maximum of 27°C (81°F), with an average of 15°C (59°F). The month experiences 91 mm (3.6 in) of precipitation over approximately 8 days, accompanied by a humidity level of 79%. In stark contrast, December sees colder temperatures, with a minimum of -4°C (25°F) and a maximum of 16°C (61°F), averaging around 7°C (44°F). Precipitation increases slightly to 98 mm (3.8 in) over about 11 days, with humidity climbing to 83%. For more details on what to expect in December, check out Siena weather in December.
As October settles in Siena, the weather transforms, offering a delightful blend of mild temperatures and increased humidity. With maximums reaching around 27°C (81°F), the warmth still lingers, contrasting with the cooler evenings that can dip to 5°C (40°F). The month also experiences a noticeable rise in precipitation, bringing along 91 mm (3.6 in) of rain over just eight days, a significant change from the drier summer months. Such conditions herald a shift in the landscape, painting the city with vibrant autumn hues. For those interested in what to expect from Siena's weather throughout the year, the details can be further explored at Siena Climate.