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September Weather in Milan, United States

Last updated: June 24, 2025

In Milan, United States, the average temperature in September hovers around 14°C (57°F). Expect minimums to dip as low as -4°C (25°F) and a warm maximum of 29°C (84°F). During this month, precipitation amounts to 66 mm (2.6 in) over approximately 9 days, while the average humidity lingers at a comfortable 77%.

September Temperature in Milan

In September in Milan, the average temperature is 14°C (57°F), with maximums reaching 29°C (84°F) and minimums dipping as low as -4°C (25°F). Travelers should be prepared for a wide range of temperatures and pack accordingly for their visit.

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

The chart illustrates September temperature patterns in Milan, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Milan, September typically has an average temperature of 14°C (57°F), with highs reaching up to 29°C (84°F) and lows dropping to around -4°C (25°F).
JanFebMarAprMayJunJulAugSepOctNovDec151825385161666457453020
Data source: Temperature data for Milan 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 Milan

In Milan in September, the precipitation amount is 66 mm (2.6 in) over the course of 9 days.

September Precipitation Trends in Milan

The chart displays monthly precipitation patterns in Milan, 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 Milan, September typically receives around 66 mm (2.6 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec8587751219710612111066124109100
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Milan

In Milan in September, humidity is 77%. With an average temperature of 14°C (57°F), this humidity feels like a heavy blanket wrapping around you, making outdoor exploration feel muggy and leaving you craving the shade while you travel.

September Average Humidity in Milan

This chart illustrates the average monthly humidity levels in Milan, 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 Milan is approximately 77%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec91%89%85%84%78%72%75%74%77%85%86%85%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Milan

In Milan 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 Milan.

Maximum UV Index Levels in Milan for September

The chart shows the monthly maximum UV Index (UVI) for Milan 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 Milan typically reaches 7, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec2468910997532
Data source: Milan 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 Milan Compares to Other Months

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

This table compares monthly weather conditions in Milan, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-9°C (16°F)85 mm (3.3 inches)91%low
February Weather-8°C (19°F)87 mm (3.4 inches)89%moderate
March Weather-4°C (25°F)75 mm (3.0 inches)85%high
April Weather3°C (38°F)121 mm (4.8 inches)84%very high
May Weather11°C (52°F)97 mm (3.8 inches)78%very high
June Weather16°C (61°F)106 mm (4.2 inches)72%very high
July Weather19°C (66°F)121 mm (4.8 inches)75%very high
August Weather18°C (64°F)110 mm (4.3 inches)74%very high
September Weather14°C (57°F)66 mm (2.6 inches)77%high
October Weather7°C (45°F)124 mm (4.9 inches)85%moderate
November Weather-1°C (31°F)109 mm (4.3 inches)86%moderate
December Weather-7°C (21°F)100 mm (4.0 inches)85%low

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