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September Weather in Brown City, United States

Last updated: June 24, 2025

In September, the average temperature in Brown City, United States is a comfortable 18°C (64°F). However, be prepared for a range of temperatures, with minimums dropping to 0°C (33°F) and maximums reaching 34°C (94°F). Expect some rain, as the area typically sees 81 mm (3.2 in) of precipitation over about 10 days. With an average humidity of 80%, it’s a month that feels both lush and warm.

September Temperature in Brown City

In September in Brown City, the average temperature is 18°C (64°F), with maximums reaching up to 34°C (94°F) and minimums dropping as low as 0°C (33°F). This varied climate makes it essential for travelers to pack for both warm and cool conditions.

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

The chart illustrates September temperature patterns in Brown City, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Brown City, September typically has an average temperature of 18°C (64°F), with highs reaching up to 34°C (94°F) and lows dropping to around 0°C (33°F).
JanFebMarAprMayJunJulAugSepOctNovDec252635455868737064523831
Data source: Temperature data for Brown 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 Brown City

In Brown City in September, the precipitation amount is 81 mm (3.2 in) over a span of 10 days.

September Precipitation Trends in Brown City

The chart displays monthly precipitation patterns in Brown 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 Brown City, September typically receives around 81 mm (3.2 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec616664961001028490811086753
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Brown City

In Brown City in September humidity is 80%. With an average temperature of 18°C (64°F), this humidity feels like a warm, damp blanket wrapping around you, making travel a bit more exhausting as the air thickens and the heat clings to your skin.

September Average Humidity in Brown City

This chart illustrates the average monthly humidity levels in Brown 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 Brown City is approximately 80%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec88%87%85%86%80%80%80%81%80%84%90%86%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Brown City

In Brown City 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 Brown City.

Maximum UV Index Levels in Brown City for September

The chart shows the monthly maximum UV Index (UVI) for Brown 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 Brown City typically reaches 7, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec2458910997532
Data source: Brown 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 Brown City Compares to Other Months

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

This table compares monthly weather conditions in Brown City, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-4°C (25°F)61 mm (2.4 inches)88%low
February Weather-3°C (26°F)66 mm (2.6 inches)87%moderate
March Weather2°C (35°F)64 mm (2.5 inches)85%moderate
April Weather7°C (45°F)96 mm (3.8 inches)86%very high
May Weather14°C (58°F)100 mm (3.9 inches)80%very high
June Weather20°C (68°F)102 mm (4.0 inches)80%very high
July Weather23°C (73°F)84 mm (3.3 inches)80%very high
August Weather21°C (71°F)90 mm (3.5 inches)80%very high
September Weather18°C (64°F)81 mm (3.2 inches)80%high
October Weather11°C (53°F)108 mm (4.3 inches)84%moderate
November Weather3°C (38°F)67 mm (2.6 inches)89%moderate
December Weather-1°C (31°F)53 mm (2.1 inches)86%low

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