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September Weather in San Giuliano, Italy

Last updated: August 23, 2025

In September, the average temperature in San Giuliano, Italy hovers around 21°C (69°F). The weather can be quite variable, with minimum temperatures dropping to 7°C (46°F) and soaring to a maximum of 33°C (92°F). During this month, expect about 102 mm (4.0 in) of precipitation spread over 10 days, contributing to an average humidity of 74%.

September Temperature in San Giuliano

In September in San Giuliano, the average temperature is 21°C (69°F). Maximums can reach 33°C (92°F), while minimums can be as low as 7°C (46°F). This makes San Giuliano a great destination for travelers seeking pleasant weather with a mix of warm and cooler days.

September Weather in San Giuliano: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in San Giuliano, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In San Giuliano, September typically has an average temperature of 21°C (69°F), with highs reaching up to 33°C (92°F) and lows dropping to around 7°C (46°F).
JanFebMarAprMayJunJulAugSepOctNovDec384449576575787869595040
Data source: Temperature data for San Giuliano 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 Giuliano

In San Giuliano in September, the total precipitation amount is 102 mm (4.0 in) falling over the course of 10 days.

September Precipitation Trends in San Giuliano

The chart displays monthly precipitation patterns in San Giuliano, 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 Giuliano, September typically receives around 102 mm (4.0 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec265752721045478691027512291
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in San Giuliano

In San Giuliano in September, humidity is 74%. With an average temperature of 21°C (69°F), this humidity feels like a warm embrace that clings to your skin, making every excursion feel slightly more intense and requiring a bit more effort with every step.

September Average Humidity in San Giuliano

This chart illustrates the average monthly humidity levels in San Giuliano, 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 Giuliano is approximately 74%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec88%81%76%77%74%71%67%64%74%87%88%85%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in San Giuliano

In San Giuliano in September, the maximum UV index is 6, which corresponds to a high Exposure Category. The time to burn is approximately 25 minutes. To find the hourly UV index in San Giuliano, you can refer to this Hourly UV Index in San Giuliano.

Maximum UV Index Levels in San Giuliano for September

The chart shows the monthly maximum UV Index (UVI) for San Giuliano 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 Giuliano typically reaches 6, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec235689986532
Data source: San Giuliano 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 Giuliano Compares to Other Months

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

This table compares monthly weather conditions in San Giuliano, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather4°C (39°F)26 mm (1.0 inches)88%low
February Weather7°C (44°F)57 mm (2.2 inches)81%moderate
March Weather10°C (50°F)52 mm (2.1 inches)76%moderate
April Weather14°C (57°F)72 mm (2.8 inches)77%high
May Weather18°C (65°F)104 mm (4.1 inches)74%very high
June Weather24°C (75°F)54 mm (2.1 inches)71%very high
July Weather26°C (78°F)78 mm (3.1 inches)67%very high
August Weather26°C (79°F)69 mm (2.7 inches)64%very high
September Weather21°C (69°F)102 mm (4.0 inches)74%high
October Weather15°C (59°F)75 mm (2.9 inches)87%moderate
November Weather10°C (50°F)122 mm (4.8 inches)88%moderate
December Weather5°C (40°F)91 mm (3.6 inches)85%low

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