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September Weather in Munster, United States

Last updated: June 24, 2025

In Munster, United States, the average temperature in September is a pleasant 20°C (68°F). However, don't be caught off guard! Temperatures can drop as low as 5°C (42°F) and soar to a high of 33°C (92°F). During this month, expect around 74 mm (2.9 in) of precipitation over approximately 8 days. With an average humidity of 80%, be prepared for a bit of a muggy feel in the air.

September Temperature in Munster

In September in Munster, the average temperature is 20°C (68°F). Maximum temperatures can reach 33°C (92°F), while minimums can drop to as low as 5°C (42°F). This makes Munster an ideal destination for travelers looking to enjoy a mix of warm days and cool nights.

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

The chart illustrates September temperature patterns in Munster, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Munster, September typically has an average temperature of 20°C (68°F), with highs reaching up to 33°C (92°F) and lows dropping to around 5°C (42°F).
JanFebMarAprMayJunJulAugSepOctNovDec272939486071757368554034
Data source: Temperature data for Munster 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 Munster

In Munster in September, the precipitation amount is 74 mm (2.9 in) over a period of 8 days.

September Precipitation Trends in Munster

The chart displays monthly precipitation patterns in Munster, 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 Munster, September typically receives around 74 mm (2.9 inches) of precipitation spread over approximately 8 days.
JanFebMarAprMayJunJulAugSepOctNovDec70719911916213010392741426960
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Munster

In Munster in September, humidity is 80%. With an average temperature of 20°C (68°F), this humidity feels like traveling through a warm, dense blanket that clings to your skin, making you feel both sticky and lethargic as you explore the sights.

September Average Humidity in Munster

This chart illustrates the average monthly humidity levels in Munster, 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 Munster is approximately 80%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec82%83%84%85%79%82%80%81%80%82%88%84%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Munster

In Munster 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 Munster.

Maximum UV Index Levels in Munster for September

The chart shows the monthly maximum UV Index (UVI) for Munster 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 Munster typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec34689101098642
Data source: Munster 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 Munster Compares to Other Months

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

This table compares monthly weather conditions in Munster, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-3°C (27°F)70 mm (2.7 inches)82%moderate
February Weather-2°C (29°F)71 mm (2.8 inches)83%moderate
March Weather4°C (39°F)99 mm (3.9 inches)84%high
April Weather9°C (48°F)119 mm (4.7 inches)85%very high
May Weather16°C (60°F)162 mm (6.4 inches)79%very high
June Weather22°C (71°F)130 mm (5.1 inches)82%very high
July Weather24°C (75°F)103 mm (4.1 inches)80%very high
August Weather23°C (73°F)92 mm (3.6 inches)81%very high
September Weather20°C (68°F)74 mm (2.9 inches)80%very high
October Weather13°C (56°F)142 mm (5.6 inches)82%high
November Weather5°C (40°F)68 mm (2.7 inches)88%moderate
December Weather1°C (34°F)60 mm (2.4 inches)84%low

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