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September Weather in San Sebastiano al Vesuvio, Italy

Last updated: August 23, 2025

In San Sebastiano al Vesuvio, Italy, the average temperature in September is a pleasant 23°C (74°F). Expect a minimum of 15°C (59°F) and a maximum of 28°C (83°F), providing comfortable conditions for most outdoor activities. However, be prepared for some rain, as the area receives about 96 mm (3.8 in) of precipitation over 9 days, contributing to an average humidity of 65%.

September Temperature in San Sebastiano al Vesuvio

In September in San Sebastiano al Vesuvio, the average temperature is 23°C (74°F). Maximums can reach 28°C (83°F), while minimums can dip as low as 15°C (59°F). This pleasant temperature range makes it an ideal time for exploring the sights and enjoying outdoor activities.

September Weather in San Sebastiano al Vesuvio: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in San Sebastiano al Vesuvio, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In San Sebastiano al Vesuvio, September typically has an average temperature of 23°C (74°F), with highs reaching up to 28°C (83°F) and lows dropping to around 15°C (59°F).
JanFebMarAprMayJunJulAugSepOctNovDec525354586472777974676155
Data source: Temperature data for San Sebastiano al Vesuvio generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

September Precipitation in San Sebastiano al Vesuvio

In San Sebastiano al Vesuvio in September, the total precipitation amount is 96 mm (3.8 in) spread over a period of 9 days.

September Precipitation Trends in San Sebastiano al Vesuvio

The chart displays monthly precipitation patterns in San Sebastiano al Vesuvio, 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. In San Sebastiano al Vesuvio, September typically receives around 96 mm (3.8 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec11611388515721121296100285206
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in San Sebastiano al Vesuvio

In San Sebastiano al Vesuvio in September, humidity is 65%. With an average temperature of 23°C (74°F), this humidity feels like a warm, sticky embrace, making outdoor activities somewhat challenging but still enjoyable with the right planning.

September Average Humidity in San Sebastiano al Vesuvio

This chart illustrates the average monthly humidity levels in San Sebastiano al Vesuvio, with September’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In September, average humidity in San Sebastiano al Vesuvio is approximately 65%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec84%76%69%70%70%61%57%53%65%75%82%84%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in San Sebastiano al Vesuvio

In San Sebastiano al Vesuvio in September, the maximum UV index is 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more detailed information, you can refer to the Hourly UV Index in San Sebastiano al Vesuvio.

Maximum UV Index Levels in San Sebastiano al Vesuvio for September

The chart shows the monthly maximum UV Index (UVI) for San Sebastiano al Vesuvio 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. In September, the maximum UV index in San Sebastiano al Vesuvio typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec34679101098642
Data source: San Sebastiano al Vesuvio 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.

How September Weather in San Sebastiano al Vesuvio Compares to Other Months

Weather in San Sebastiano al Vesuvio varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in San Sebastiano al Vesuvio, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in San Sebastiano al Vesuvio, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather11°C (52°F)116 mm (4.6 inches)84%moderate
February Weather12°C (53°F)113 mm (4.5 inches)76%moderate
March Weather12°C (54°F)88 mm (3.4 inches)69%high
April Weather14°C (58°F)51 mm (2.0 inches)70%high
May Weather18°C (65°F)57 mm (2.2 inches)70%very high
June Weather22°C (73°F)21 mm (0.8 inches)61%very high
July Weather25°C (77°F)12 mm (0.5 inches)57%very high
August Weather26°C (79°F)12 mm (0.5 inches)53%very high
September Weather23°C (74°F)96 mm (3.8 inches)65%very high
October Weather19°C (67°F)100 mm (3.9 inches)75%high
November Weather16°C (62°F)285 mm (11.2 inches)81%moderate
December Weather13°C (56°F)206 mm (8.1 inches)84%low

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