September Weather in Pisa, Italy

Last updated: March 24, 2025

Pisa in September offers a delightful mix of warm temperatures and occasional rain, making it an ideal time to explore this historic city. Visitors can expect maximum temperatures peaking at 32°C (91°F) and an average of 21°C (70°F), providing a comfortable climate for sightseeing. However, as the month progresses, nighttime temperatures can drop to a refreshing 7°C (44°F). Rainfall is moderate, with a total precipitation of 97 mm (3.8 in) spread over 10 days, and humidity levels hover around 66%, adding a hint of autumn in the air. This balance of warmth and moisture enhances the beauty of Pisa's landscapes, inviting travelers to enjoy both its rich cultural heritage and picturesque scenery.

September Temperature in Pisa

In September, Pisa enjoys a delightful transition towards autumn, with temperatures offering a comfortable blend of warmth and coolness. The minimum temperature hovers around 7°C (44°F), providing a refreshing start to the day, while the average temperature reaches a pleasant 21°C (70°F), perfect for outdoor exploration. As the days progress, highs can soar up to 32°C (91°F), reminiscent of the lingering summer heat. This month seamlessly bridges the intense warmth of August and the cooler air that October brings, making it an ideal time for visitors to experience the stunning architecture and vibrant culture without the sweltering summer crowds.

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

The chart illustrates September temperature patterns in Pisa, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends.
JanFebMarAprMayJunJulAugSepOctNovDec434750566372767770615345
Data source: Temperature data for Pisa generated using information from the Copernicus Climate Change Service.
Choose your preferred temperature unit
The average of daily temperatures (24 hours) calculated across all days in the month.

September Precipitation in Pisa

In September, Pisa experiences a notable increase in precipitation, with 97 mm (3.8 in) of rain spread over 10 days. This marks a significant uptick from the drier summer months, where rainfall was considerably lower, with only 32 mm (1.2 in) in August. As the city transitions into autumn, the combination of moderate rainfall and cooler temperatures not only invigorates the landscape but also contributes to the vibrant colors of the season. This trend of increased rainfall continues into October, suggesting that the early fall months are characterized by a shift towards wetter weather patterns, paving the way for the heavier rains of later autumn.

September Precipitation Trends in Pisa

The chart displays monthly precipitation patterns in Pisa, 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.
JanFebMarAprMayJunJulAugSepOctNovDec70968210410449353297116153173
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

September Humidity in Pisa

In September, Pisa experiences a notable shift in humidity, averaging around 66%. This marks a slight increase from the drier summer months of July and August, which see their lowest levels at 57% and 55%, respectively. As the vibrant hues of autumn begin to replace the summer warmth, the return of moisture in the air signals the transition from the hot season to the cooler months ahead. Following September, humidity levels rise significantly in October to 79%, before peaking again in the winter months, underscoring a consistent pattern of higher humidity as the year draws to a close. Overall, September offers a pleasant balance where remnants of summer linger, blending with the refreshing embrace of fall, making it an inviting time to explore the beauty of Pisa.

September Average Humidity in Pisa

This chart illustrates the average monthly humidity levels in Pisa, 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 Pisa

In September, Pisa experiences a UV Index of 7, indicating a high exposure category that suggests caution for sun-seekers. This month marks a slight decrease from the peak values seen in July and August, but still calls for vigilance, with a burn time of just 25 minutes for unprotected skin. As summer lingers, the UV levels remain significant, highlighting the importance of sun protection even as the temperatures begin to cool. Transitioning into October, the index further drops to 5, leading into more moderate conditions. For more insights on sun safety in this beautiful city, check out the detailed guide on the Pisa UV Index.

Maximum UV Index Levels in Pisa for September

The chart shows the monthly maximum UV Index (UVI) for Pisa 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.
JanFebMarAprMayJunJulAugSepOctNovDec2467810987532
Data source: Pisa 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 Pisa

As summer gracefully fades into autumn, September in Pisa, Italy, offers a delightful balance of warmth and light, with 341 hours of sunshine illuminating the iconic landscapes. This month captures a noticeable shift compared to the sun-soaked heights of July, which basks in 434 hours of sunshine, while still retaining a significant glow compared to the chillier days of October, which dips to 312 hours. September's sunshine sets a serene backdrop for leisurely strolls by the Leaning Tower or vibrant market days, as it gracefully bridges the energy of summer and the tranquil allure of autumn. Overall, this month remains a cherished time, with just enough sunlight to enjoy the remnants of the warm season before the cooler days ahead.

Monthly Sunshine Duration in Pisa: September Highlighted

The September sunshine duration represents the total number of hours Pisa 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.
JanFebMarAprMayJunJulAugSepOctNovDec194h250h322h354h398h420h434h404h341h312h241h222h
Data source: Pisa September Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Pisa During September

In September, Pisa, Italy enjoys a 57% chance of sunny weather, making it a delightful time to explore the city's historic sites and beautiful landscapes. This figure reflects a slight dip from the previous months, where August hits a peak at 65%, but still offers a favorable forecast for outdoor activities. As summer transitions to autumn, the likelihood of sunshine remains relatively high compared to the cooler months ahead, such as October at 47% and November at 36%. Travelers can expect warm, inviting days, ideal for leisurely strolls along the Arno River or enjoying a gelato in the Piazza dei Miracoli.

Percentage of Sunny Days in September in Pisa

The chart illustrates the percentage of sunny days in Pisa 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 Pisa experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec33%45%63%48%43%57%60%65%57%47%36%44%
Data source: Pisa September chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Pisa in September

As summer fades into autumn in Pisa, Italy, **September greets visitors with a pleasant 12 hours of daylight. This month marks a gentle decline from the longer days of July and August, which basked in 15 hours of sunshine. The shift in daylight hours reflects the gradual transition into fall, where daylight continues to wane, dropping to 10 hours in October and further to 9 hours in November. Throughout the year, Pisa experiences an ebb and flow in daylight, peaking in the summer months and retreating as the colder seasons approach. This rhythmic pattern not only influences the city’s atmosphere but also sets the stage for a captivating tapestry of seasonal change, making each September day a delightful experience under the crisp autumn sky.

Average Daylight Hours in Pisa for September

The chart illustrates the variation in daylight duration in Pisa throughout the year, with September highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec9h 20m10h 29m11h 57m13h 26m14h 43m15h 21m15h 1m13h 53m12h 27m10h 58m9h 39m8h 58m
Data source: Pisa daylight hours, calculated by summing the hours between sunrise and sunset for each day.

September Winds in Pisa

As September unfolds in Pisa, Italy, the city experiences a gentle breeze with an average wind speed of 1.6 m/s (4 mph), marking a gradual decline from the summer's mild winds. This subtle shift hints at the transition into autumn, contrasting sharply with the peak of 2.3 m/s (5 mph) in May and the lingering warmth of the summer months. The wind calms down from the previously higher speeds, reflecting a broader trend of dwindling breezes that continues into the quieter months of October and November. As visitors stroll through Pisa’s historic streets, the soft September winds create an atmosphere of serenity, inviting leisurely exploration of its stunning architecture and picturesque landscapes.

Average September Wind Speed in Pisa

The chart displays monthly wind speed patterns in Pisa, 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.
JanFebMarAprMayJunJulAugSepOctNovDec2.22.12.12.12.31.51.81.81.6 m/s2.12.41.7
Data source: Pisa September wind data, generated using information from the Copernicus Climate Change Service.

How September Weather in Pisa Compares to Other Months

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

September and January present a stark contrast in weather conditions. September boasts warmer temperatures, with averages around 21°C (70°F) and a maximum of 32°C (91°F), making it a much more pleasant month for outdoor activities. In contrast, January temperatures drop significantly, averaging only 6°C (43°F) and reaching a maximum of 16°C (61°F), which may necessitate heavier clothing. Additionally, while September has a higher humidity level of 66% and experiences 97 mm (3.8 in) of precipitation over approximately 10 days, January sees increased humidity at 84%, but less total precipitation at 70 mm (2.8 in) over 8 days. For more details, you can check Pisa weather in January.

September and February showcase markedly different weather patterns. In September, temperatures are generally warmer, ranging from a minimum of 7°C (44°F) to a maximum of 32°C (91°F), with an average of 21°C (70°F). The month also experiences a moderate amount of rainfall, totaling 97 mm (3.8 in) over about 10 days, and humidity levels average around 66%. In contrast, February brings significantly cooler temperatures, with a minimum of -5°C (23°F) and a maximum of 18°C (65°F), averaging only 8°C (47°F). Like September, February also sees a similar amount of precipitation at 96 mm (3.8 in) across roughly 10 days, but with higher humidity at 76%. For a more detailed look at February weather in a specific location, you can refer to Pisa weather in February.

September and March present contrasting weather patterns, marking the transition from summer to autumn and winter to spring, respectively. In September, temperatures range from a pleasant 21°C (70°F) on average, peaking at 32°C (91°F), with a relatively high humidity of 66% and 97 mm of precipitation over about 10 days. In contrast, March experiences cooler weather, with average temperatures around 10°C (50°F) and maximums reaching only 23°C (73°F). This month has a slightly lower total precipitation of 82 mm (3.2 in) across 9 days and a slightly higher humidity level of 68%. For a closer look at what to expect in March, check outPisa weather in March.

September and April weather contrasts significantly in terms of temperature and conditions. September experiences warmer temperatures with a minimum of 7°C (44°F) and an average of 21°C (70°F), peaking at a high of 32°C (91°F). In contrast, April is much cooler, having a minimum of -1°C (31°F) and an average temperature of 13°C (56°F), with a maximum of 27°C (81°F). While both months see substantial precipitation—97 mm (3.8 in) in September and 104 mm (4.1 in) in April—April has slightly fewer days of rain, totaling just 9 days compared to September's 10. Humidity levels are also comparable, with September at 66% and April slightly higher at 70%. For more specific details about April weather, you can check out Pisa weather in April.

September and May both exhibit mild temperatures, but there are some notable differences in their weather patterns. In September, the temperatures range from a minimum of 7°C (44°F) to a maximum of 32°C (91°F), with an average of 21°C (70°F). This month usually experiences around 97 mm (3.8 in) of precipitation over about 10 days, accompanied by a humidity level of 66%. In contrast, May features slightly cooler temperatures, with a minimum of 6°C (43°F) and an average of 17°C (63°F), while still reaching a maximum of 32°C (89°F). Additionally, May has higher precipitation levels at 104 mm (4.1 in) over 14 days and a humidity of 69%. If you're looking for more details, check out the Pisa weather in May for a deeper dive into the specific conditions of that month.

In September, temperatures range from a cool minimum of 7°C (44°F) to a warm average of 21°C (70°F), peaking at a hot 32°C (91°F). This month typically experiences more rainfall, with about 97 mm (3.8 in) of precipitation over approximately 10 days, resulting in a humidity level of around 66%. In contrast, June showcases milder weather with minimum temperatures of 12°C (53°F) and an average of 22°C (72°F), reaching a maximum of 35°C (95°F). Precipitation is lighter in June, totaling about 49 mm (1.9 in) over just 6 days, and humidity stands slightly lower at 62%. For more details, check out Pisa weather in June.

In comparing the weather of September and July, we see notable differences in temperature and precipitation. September tends to have milder temperatures, with a minimum of 7°C (44°F) and an average of 21°C (70°F), while July is warmer, starting at a minimum of 14°C (58°F) and averaging 24°C (76°F). July records higher maximum temperatures as well, reaching up to 35°C (95°F) compared to September's 32°C (91°F). Additionally, July experiences less precipitation, totaling only 35 mm (1.4 in) over 6 days, whereas September sees more rain—97 mm (3.8 in) over 10 days and a higher humidity level at 66% compared to July's 57%. For more details on how the temperatures vary, you can check out this link: Pisa weather in July.

In comparing the weather between August and September, there are notable differences in temperature and precipitation. August typically enjoys warmer temperatures, with a minimum of 13°C (55°F), an average of 25°C (77°F), and a maximum of 35°C (95°F). In contrast, September sees cooler temperatures, with a minimum of 7°C (44°F), an average of 21°C (70°F), and a maximum of 32°C (91°F). Additionally, September experiences more rainfall, totaling 97 mm (3.8 in) over about 10 days, compared to August’s modest 32 mm (1.2 in) over just 5 days. Humidity levels are also higher in September at 66%, while August maintains a lower humidity of 55%. For more details on the August weather, you can visit Pisa weather in August.

September and October exhibit notable differences in weather patterns. September typically experiences warmer temperatures, with a minimum of 7°C (44°F) and an average high of 32°C (91°F), making it feel quite warm overall, averaging around 21°C (70°F). In contrast, October sees a significant drop in temperature, with a minimum of 5°C (41°F) and an average high of 26°C (79°F), resulting in a cooler average of 16°C (61°F).

Precipitation also increases slightly from September to October, rising from 97 mm (3.8 in) over 10 days to 116 mm (4.6 in) across 11 days, which contributes to a higher humidity level of 79% in October compared to September's 66%. For more detailed information on October weather, you can visit Pisa weather in October.

September weather in Pisa tends to be much warmer and drier compared to November. With average temperatures reaching 21°C (70°F) and highs of 32°C (91°F), September offers a pleasant late-summer warmth, complemented by relatively low humidity at 66%. However, as the month progresses into November, temperatures drop significantly, with an average of 11°C (53°F) and nighttime lows falling to -1°C (31°F). November also sees increased precipitation, totaling 153 mm (6.0 in) over 14 days, and a higher humidity level of 84%. For more detailed information about November conditions in Pisa, you can check out Pisa weather in November.

September and December present contrasting weather conditions. In September, temperatures range from a comfortable minimum of 7°C (44°F) to a pleasant maximum of 32°C (91°F), with an average of 21°C (70°F). The month experiences 97 mm (3.8 in) of precipitation over approximately 10 days and boasts a humidity level of 66%. In stark contrast, December sees much chillier temperatures, with a minimum of -3°C (27°F) and an average of only 7°C (46°F), peaking at 17°C (62°F). The month is notably wetter, receiving 173 mm (6.8 in) of rainfall over 15 days, accompanied by higher humidity at 83%. For those interested in more details, you can check Pisa weather in December.

Compare Pisa's Climate with Cities Worldwide

Conclusion: What to Expect From September Weather in Pisa

As summer bids farewell, September in Pisa ushers in a delightful transition, offering a mix of warm days and cooler nights that set it apart from the peak summer months. With average temperatures hovering around a comfortable 21°C (70°F), visitors can enjoy pleasant outdoor experiences, while the occasional rainfall—amounting to 97 mm (3.8 in) over approximately 10 days—brings much-needed hydration to the surrounding landscapes. The humidity level at 66% adds a refreshing touch, making this month particularly inviting for those looking to explore the rich culture and history of the city without the intense heat of July and August. For more detailed insights, visit Pisa Climate.