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September Weather in Brookville, United States

Last updated: June 24, 2025

In September, the average temperature in Brookville, United States is a pleasant 21°C (69°F). Expect minimums as low as 6°C (42°F) and maximums soaring to 33°C (92°F). Be prepared for a bit of moisture, as the region receives about 87 mm (3.4 in) of precipitation over approximately 7 days, with an average humidity level of 69%.

September Temperature in Brookville

In September in Brookville, the average temperature is 21°C (69°F). Maximum temperatures can reach up to 33°C (92°F), while the minimum can drop as low as 6°C (42°F). This makes Brookville an ideal destination for travelers seeking pleasant, mild weather for outdoor activities.

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

The chart illustrates September temperature patterns in Brookville, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Brookville, September typically has an average temperature of 21°C (69°F), with highs reaching up to 33°C (92°F) and lows dropping to around 6°C (42°F).
JanFebMarAprMayJunJulAugSepOctNovDec313543526472767469584237
Data source: Temperature data for Brookville 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 Brookville

In Brookville in September, the precipitation amount is 87 mm (3.4 in) over a span of 7 days.

September Precipitation Trends in Brookville

The chart displays monthly precipitation patterns in Brookville, 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 Brookville, September typically receives around 87 mm (3.4 inches) of precipitation spread over approximately 7 days.
JanFebMarAprMayJunJulAugSepOctNovDec78105130109135133130101871009596
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Brookville

In Brookville in September, humidity is 69%. With an average temperature of 21°C (69°F), this humidity feels like a warm embrace, making travel somewhat uncomfortable as the air clings around you, urging you to seek shade and refreshment along your journey.

September Average Humidity in Brookville

This chart illustrates the average monthly humidity levels in Brookville, 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 Brookville 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 Brookville

In Brookville 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 Brookville.

Maximum UV Index Levels in Brookville for September

The chart shows the monthly maximum UV Index (UVI) for Brookville 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 Brookville typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec357910111098643
Data source: Brookville 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 Brookville Compares to Other Months

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

This table compares monthly weather conditions in Brookville, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-1°C (31°F)78 mm (3.1 inches)87%moderate
February Weather1°C (35°F)105 mm (4.1 inches)85%moderate
March Weather6°C (43°F)130 mm (5.1 inches)86%high
April Weather11°C (53°F)109 mm (4.3 inches)84%very high
May Weather18°C (65°F)135 mm (5.3 inches)79%very high
June Weather22°C (73°F)133 mm (5.2 inches)82%extreme
July Weather25°C (76°F)130 mm (5.1 inches)79%very high
August Weather23°C (74°F)101 mm (4.0 inches)70%very high
September Weather21°C (69°F)87 mm (3.4 inches)69%very high
October Weather14°C (58°F)100 mm (3.9 inches)76%high
November Weather6°C (42°F)95 mm (3.7 inches)88%moderate
December Weather3°C (37°F)95 mm (3.8 inches)87%moderate

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