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September Weather in Milan, United States

Last updated: June 24, 2025

In September, the average temperature in Milan, United States hovers around 24°C (75°F). This pleasant climate can experience a minimum drop to 9°C (49°F) and a maximum peak of 37°C (98°F). Travelers should be prepared for some rain, as precipitation amounts can reach 108 mm (4.3 in) over the span of 7 days. Don’t forget to account for the average humidity level of 70% to ensure a comfortable and enjoyable visit!

September Temperature in Milan

In September in Milan, the average temperature is 24°C (75°F). Maximums can reach 37°C (98°F), and minimums can be as low as 9°C (49°F). This range of temperatures makes Milan an ideal destination for travelers seeking warm weather with the option for cooler evenings.

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 24°C (75°F), with highs reaching up to 37°C (98°F) and lows dropping to around 9°C (49°F).
JanFebMarAprMayJunJulAugSepOctNovDec404453597177817875634945
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 total precipitation amount is 108 mm (4.3 in) over the course of 7 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 108 mm (4.3 inches) of precipitation spread over approximately 7 days.
JanFebMarAprMayJunJulAugSepOctNovDec10016717015311211213011410812394139
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 70%. With an average temperature of 24°C (75°F), this humidity feels like a warm, heavy blanket wrapping around you, making outdoor activities a bit sluggish and sticky, ideal for leisurely strolls but requiring plenty of hydration.

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 70%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec86%85%84%81%83%83%80%74%70%73%85%88%
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 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For 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 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec36710111111109753
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 Weather5°C (41°F)100 mm (3.9 inches)86%moderate
February Weather7°C (44°F)167 mm (6.6 inches)85%high
March Weather12°C (53°F)170 mm (6.7 inches)84%high
April Weather15°C (60°F)153 mm (6.0 inches)81%very high
May Weather21°C (71°F)112 mm (4.4 inches)83%extreme
June Weather25°C (78°F)112 mm (4.4 inches)83%extreme
July Weather27°C (81°F)130 mm (5.1 inches)80%extreme
August Weather26°C (79°F)114 mm (4.5 inches)73%very high
September Weather24°C (75°F)108 mm (4.3 inches)70%very high
October Weather17°C (64°F)123 mm (4.8 inches)73%high
November Weather9°C (49°F)93 mm (3.7 inches)85%moderate
December Weather7°C (46°F)139 mm (5.5 inches)88%moderate

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