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September Weather in Evansville, United States

Last updated: June 24, 2025

In September, the average temperature in Evansville, United States is a pleasant 23°C (73°F), with nightly lows dipping to 9°C (48°F) and daytime highs soaring up to 35°C (95°F). Expect about 83 mm (3.3 inches) of precipitation spread over 8 days, contributing to an average humidity level of 75%.

September Temperature in Evansville

In September in Evansville, the average temperature is 23°C (73°F). The maximum can reach 35°C (95°F), while the minimum can drop to as low as 9°C (48°F). This variety in temperatures makes Evansville an ideal destination for travelers seeking a mix of warm days and cooler evenings.

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

The chart illustrates September temperature patterns in Evansville, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Evansville, September typically has an average temperature of 23°C (73°F), with highs reaching up to 35°C (95°F) and lows dropping to around 9°C (48°F).
JanFebMarAprMayJunJulAugSepOctNovDec363949576977807873614641
Data source: Temperature data for Evansville 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 Evansville

In Evansville in September, the precipitation amount reaches 83 mm (3.3 in) over the course of 8 days.

September Precipitation Trends in Evansville

The chart displays monthly precipitation patterns in Evansville, 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 Evansville, September typically receives around 83 mm (3.3 inches) of precipitation spread over approximately 8 days.
JanFebMarAprMayJunJulAugSepOctNovDec9612214012013311579858411792101
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Evansville

In Evansville in September, humidity is 75%. With an average temperature of 23°C (73°F), this humidity feels like a warm embrace, making travel slightly uncomfortable yet invigorating as the air wraps around you, creating a sense of walking through a lush, tropical paradise.

September Average Humidity in Evansville

This chart illustrates the average monthly humidity levels in Evansville, 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 Evansville is approximately 75%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec86%84%84%80%82%83%80%76%75%75%85%88%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Evansville

In Evansville 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 Evansville.

Maximum UV Index Levels in Evansville for September

The chart shows the monthly maximum UV Index (UVI) for Evansville 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 Evansville typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec35710101110109753
Data source: Evansville 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 Evansville Compares to Other Months

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

This table compares monthly weather conditions in Evansville, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather2°C (36°F)96 mm (3.8 inches)86%moderate
February Weather4°C (39°F)122 mm (4.8 inches)84%moderate
March Weather9°C (49°F)140 mm (5.5 inches)84%high
April Weather14°C (57°F)119 mm (4.7 inches)80%very high
May Weather21°C (69°F)133 mm (5.2 inches)82%very high
June Weather25°C (77°F)115 mm (4.5 inches)83%extreme
July Weather27°C (80°F)79 mm (3.1 inches)79%very high
August Weather25°C (78°F)85 mm (3.4 inches)76%very high
September Weather23°C (73°F)83 mm (3.3 inches)75%very high
October Weather16°C (62°F)117 mm (4.6 inches)74%high
November Weather8°C (46°F)92 mm (3.6 inches)85%moderate
December Weather5°C (42°F)101 mm (4.0 inches)88%moderate

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