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September Weather in Milan, United States

Last updated: June 24, 2025

The average temperature in Milan, United States during September hovers around 21°C (70°F). Expect minimums around 7°C (44°F) and highs that can soar up to 34°C (94°F). Be prepared for some rain, with a precipitation amount of approximately 90 mm (3.5 in) over about 8 days. Additionally, the average humidity sits at a comfortable 69%, making it a pleasant time to experience the locale.

September Temperature in Milan

In September in Milan, the average temperature is 21°C (70°F). Maximums can reach 34°C (94°F), and minimums can be as low as 7°C (44°F). This makes it an ideal time for travelers to enjoy mild weather and a variety of outdoor activities.

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 21°C (70°F), with highs reaching up to 34°C (94°F) and lows dropping to around 7°C (44°F).
JanFebMarAprMayJunJulAugSepOctNovDec333745546673777570594338
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 90 mm (3.5 in) spread over 8 days, indicating a relatively wet period for the region.

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 90 mm (3.5 inches) of precipitation spread over approximately 8 days.
JanFebMarAprMayJunJulAugSepOctNovDec8611714012712714811110390100102109
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 69%. With an average temperature of 21°C (70°F), this humidity feels like a warm embrace, making outdoor activities enjoyable but requiring occasional breaks for hydration and shade during your travels.

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 69%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec87%85%86%84%79%82%79%70%69%76%88%87%
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 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 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 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec357910101098643
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 Weather0°C (33°F)86 mm (3.4 inches)87%moderate
February Weather3°C (37°F)117 mm (4.6 inches)85%moderate
March Weather7°C (45°F)140 mm (5.5 inches)86%high
April Weather12°C (54°F)127 mm (5.0 inches)84%very high
May Weather19°C (66°F)127 mm (5.0 inches)79%very high
June Weather23°C (73°F)148 mm (5.8 inches)82%very high
July Weather25°C (77°F)111 mm (4.4 inches)79%very high
August Weather24°C (75°F)103 mm (4.1 inches)70%very high
September Weather21°C (70°F)90 mm (3.5 inches)69%very high
October Weather15°C (59°F)100 mm (3.9 inches)76%high
November Weather6°C (44°F)102 mm (4.0 inches)88%moderate
December Weather4°C (39°F)109 mm (4.3 inches)87%moderate

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