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September Weather in Michigan City, United States

Last updated: June 24, 2025

In September, the average temperature in Michigan City, United States is a pleasant 20°C (68°F). Expect a comfortable range with minimums dipping to 10°C (50°F) and maximums reaching up to 29°C (84°F). While you enjoy the mild weather, be prepared for some rainfall, with an average precipitation of 75 mm (3.0 in) spread across 9 days. Humidity levels are typically around 78%, adding to the overall ambiance of this charming locale.

September Temperature in Michigan City

In September in Michigan City, the average temperature is 20°C (68°F). Maximums can reach 29°C (84°F), and minimums can be as low as 10°C (50°F). This pleasant climate makes Michigan City an ideal destination for travelers looking to enjoy mild weather and outdoor activities.

September Weather in Michigan City: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Michigan City, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Michigan City, September typically has an average temperature of 20°C (68°F), with highs reaching up to 29°C (84°F) and lows dropping to around 10°C (50°F).
JanFebMarAprMayJunJulAugSepOctNovDec293037445567737368564236
Data source: Temperature data for Michigan City 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 Michigan City

In Michigan City in September, the precipitation amount is 75 mm (3.0 in) distributed over 9 days.

September Precipitation Trends in Michigan City

The chart displays monthly precipitation patterns in Michigan City, 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 Michigan City, September typically receives around 75 mm (3.0 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec86811021161591298282751558279
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Michigan City

In Michigan City in September humidity is 78%. With an average temperature of 20°C (68°F), this humidity feels like a warm, enveloping blanket that makes exploring the sights a bit sticky, so travelers should stay hydrated and take frequent breaks in the shade.

September Average Humidity in Michigan City

This chart illustrates the average monthly humidity levels in Michigan City, 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 Michigan City is approximately 78%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec85%85%86%87%81%82%81%79%78%81%89%86%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Michigan City

In Michigan City 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 Michigan City.

Maximum UV Index Levels in Michigan City for September

The chart shows the monthly maximum UV Index (UVI) for Michigan City 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 Michigan City typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec35689101098642
Data source: Michigan City 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 Michigan City Compares to Other Months

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

This table compares monthly weather conditions in Michigan City, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-2°C (29°F)86 mm (3.4 inches)85%moderate
February Weather-1°C (30°F)81 mm (3.2 inches)85%moderate
March Weather3°C (37°F)102 mm (4.0 inches)86%high
April Weather7°C (44°F)116 mm (4.6 inches)87%very high
May Weather13°C (55°F)159 mm (6.3 inches)81%very high
June Weather19°C (67°F)129 mm (5.1 inches)82%very high
July Weather23°C (73°F)82 mm (3.2 inches)81%very high
August Weather23°C (73°F)82 mm (3.2 inches)79%very high
September Weather20°C (68°F)75 mm (3.0 inches)78%very high
October Weather13°C (57°F)155 mm (6.1 inches)81%high
November Weather5°C (42°F)82 mm (3.2 inches)89%moderate
December Weather2°C (36°F)79 mm (3.1 inches)86%low

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