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September Weather in Bastia, Italy

Last updated: August 23, 2025

In September, the average temperature in Bastia, Italy hovers around 21°C (71°F), with a comfortable range from a minimum of 15°C (59°F) to a maximum of 27°C (80°F). Visitors can expect 40 mm (1.6 in) of precipitation spread over about 7 days, contributing to an average humidity of 70%. This blend of warmth and moisture creates a pleasantly mild climate, perfect for exploring!

September Temperature in Bastia

In September in Bastia, the average temperature is 21°C (71°F), with maximums reaching 27°C (80°F) and minimums dipping as low as 15°C (59°F). This pleasant weather makes Bastia an ideal destination for outdoor activities and exploration.

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

The chart illustrates September temperature patterns in Bastia, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Bastia, September typically has an average temperature of 21°C (71°F), with highs reaching up to 27°C (80°F) and lows dropping to around 15°C (59°F).
JanFebMarAprMayJunJulAugSepOctNovDec505152566270747671645751
Data source: Temperature data for Bastia 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 Bastia

In Bastia in September, the precipitation amount is 40 mm (1.6 in) over a span of 7 days.

September Precipitation Trends in Bastia

The chart displays monthly precipitation patterns in Bastia, 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 Bastia, September typically receives around 40 mm (1.6 inches) of precipitation spread over approximately 7 days.
JanFebMarAprMayJunJulAugSepOctNovDec60517677662436134012217499
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Bastia

In Bastia in September humidity is 70%. With an average temperature of 21°C (71°F), this humidity feels like a warm, enveloping blanket, making travel feel both comfortable and slightly sticky, requiring frequent breaks to stay refreshed.

September Average Humidity in Bastia

This chart illustrates the average monthly humidity levels in Bastia, 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 Bastia is approximately 70%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec80%72%69%74%75%72%69%68%70%77%80%76%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Bastia

In Bastia in September, the maximum UV index is 7, which corresponds to the high Exposure Category. This means that the time to burn is approximately 25 minutes. For more detailed information, you can check the Hourly UV Index in Bastia.

Maximum UV Index Levels in Bastia for September

The chart shows the monthly maximum UV Index (UVI) for Bastia 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 Bastia typically reaches 7, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec246789987532
Data source: Bastia 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 Bastia Compares to Other Months

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

This table compares monthly weather conditions in Bastia, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather10°C (50°F)60 mm (2.4 inches)80%low
February Weather10°C (51°F)51 mm (2.0 inches)72%moderate
March Weather11°C (53°F)76 mm (3.0 inches)69%high
April Weather14°C (57°F)77 mm (3.0 inches)74%high
May Weather17°C (62°F)66 mm (2.6 inches)75%very high
June Weather21°C (70°F)24 mm (0.9 inches)72%very high
July Weather23°C (74°F)36 mm (1.4 inches)69%very high
August Weather24°C (76°F)13 mm (0.5 inches)68%very high
September Weather21°C (71°F)40 mm (1.6 inches)70%high
October Weather18°C (64°F)122 mm (4.8 inches)77%moderate
November Weather14°C (57°F)174 mm (6.8 inches)80%moderate
December Weather11°C (52°F)99 mm (3.9 inches)76%low

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