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September Weather in Jeffersonville, United States

Last updated: June 24, 2025

In Jeffersonville, United States, the average temperature in September is a comfortable 20°C (69°F). However, be prepared for variations, as temperatures can dip as low as 5°C (42°F) and soar to a maximum of 34°C (94°F). Expect around 93 mm (3.7 in) of precipitation spread over 8 days, contributing to an average humidity level of 73%.

September Temperature in Jeffersonville

In September in Jeffersonville, the average temperature is 20°C (69°F). Maximum temperatures can reach 34°C (94°F), while minimums can drop to as low as 5°C (42°F). Be sure to pack for a range of weather conditions, from warm days to cooler evenings, as you explore Jeffersonville.

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

The chart illustrates September temperature patterns in Jeffersonville, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Jeffersonville, September typically has an average temperature of 20°C (69°F), with highs reaching up to 34°C (94°F) and lows dropping to around 5°C (42°F).
JanFebMarAprMayJunJulAugSepOctNovDec313443526472767369584237
Data source: Temperature data for Jeffersonville 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 Jeffersonville

In Jeffersonville in September, the total precipitation amount is 93 mm (3.7 in) over the course of 8 days.

September Precipitation Trends in Jeffersonville

The chart displays monthly precipitation patterns in Jeffersonville, 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 Jeffersonville, September typically receives around 93 mm (3.7 inches) of precipitation spread over approximately 8 days.
JanFebMarAprMayJunJulAugSepOctNovDec7811011711512714011892939697102
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Jeffersonville

In Jeffersonville in September humidity is 73%. With an average temperature of 20°C (69°F), this humidity feels like a warm embrace, making travel slightly sticky but ultimately comfortable as long as you stay hydrated and take breaks in the shade.

September Average Humidity in Jeffersonville

This chart illustrates the average monthly humidity levels in Jeffersonville, 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 Jeffersonville is approximately 73%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec88%88%87%85%81%82%81%73%73%78%89%87%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Jeffersonville

In Jeffersonville 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 Jeffersonville.

Maximum UV Index Levels in Jeffersonville for September

The chart shows the monthly maximum UV Index (UVI) for Jeffersonville 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 Jeffersonville typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec356910101098643
Data source: Jeffersonville 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 Jeffersonville Compares to Other Months

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

This table compares monthly weather conditions in Jeffersonville, 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)88%moderate
February Weather1°C (35°F)110 mm (4.3 inches)88%moderate
March Weather6°C (43°F)117 mm (4.6 inches)87%high
April Weather11°C (53°F)115 mm (4.5 inches)85%very high
May Weather18°C (64°F)127 mm (5.0 inches)81%very high
June Weather22°C (72°F)140 mm (5.5 inches)82%very high
July Weather24°C (76°F)118 mm (4.6 inches)81%very high
August Weather23°C (74°F)92 mm (3.6 inches)73%very high
September Weather20°C (69°F)93 mm (3.7 inches)73%very high
October Weather14°C (58°F)96 mm (3.8 inches)78%high
November Weather6°C (42°F)96 mm (3.8 inches)89%moderate
December Weather3°C (37°F)102 mm (4.0 inches)87%moderate

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