nomadseason

September Weather in Frankfort, United States

Last updated: June 24, 2025

In September, the average temperature in Frankfort, United States hovers around 17°C (63°F). Expect a minimum of 8°C (47°F) and a maximum of 23°C (74°F), providing a pleasant range for outdoor activities. Be prepared for some rain, as 93 mm (3.6 in) of precipitation typically falls over about 11 days. The average humidity sits at a comfortable 79%, lending a fresh feel to the air.

September Temperature in Frankfort

In September in Frankfort, the average temperature is 17°C (63°F). Maximum temperatures can reach up to 23°C (74°F), while the minimum can drop as low as 8°C (47°F). This pleasant climate makes Frankfort an ideal destination for travelers seeking mild weather and outdoor activities.

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

The chart illustrates September temperature patterns in Frankfort, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Frankfort, September typically has an average temperature of 17°C (63°F), with highs reaching up to 23°C (74°F) and lows dropping to around 8°C (47°F).
JanFebMarAprMayJunJulAugSepOctNovDec272632374555666863533932
Data source: Temperature data for Frankfort generated using information from the Copernicus Climate Change Service.
Choose your preferred temperature unit
The average of daily temperatures (24 hours) calculated across all days in the month.

September Precipitation in Frankfort

In Frankfort in September, the precipitation amount is 93 mm (3.6 in) over the course of 11 days.

September Precipitation Trends in Frankfort

The chart displays monthly precipitation patterns in Frankfort, 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 Frankfort, September typically receives around 93 mm (3.6 inches) of precipitation spread over approximately 11 days.
JanFebMarAprMayJunJulAugSepOctNovDec6972699811810910397931439587
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

September Humidity in Frankfort

In Frankfort in September, humidity is 79%. With an average temperature of 17°C (63°F), this humidity feels like a warm, muggy embrace, making outdoor activities less comfortable and prompting travelers to seek shaded areas or cool refreshments more frequently.

September Average Humidity in Frankfort

This chart illustrates the average monthly humidity levels in Frankfort, 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 Frankfort is approximately 79%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec91%91%87%87%82%79%76%76%79%83%86%87%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Frankfort

In Frankfort 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 Frankfort.

Maximum UV Index Levels in Frankfort for September

The chart shows the monthly maximum UV Index (UVI) for Frankfort 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 Frankfort typically reaches 7, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec2457910987532
Data source: Frankfort 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 Frankfort Compares to Other Months

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

This table compares monthly weather conditions in Frankfort, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-3°C (27°F)68 mm (2.7 inches)91%low
February Weather-3°C (27°F)72 mm (2.8 inches)91%moderate
March Weather0°C (32°F)69 mm (2.7 inches)87%moderate
April Weather3°C (38°F)98 mm (3.9 inches)87%high
May Weather7°C (45°F)118 mm (4.7 inches)82%very high
June Weather13°C (55°F)109 mm (4.3 inches)79%very high
July Weather19°C (66°F)103 mm (4.1 inches)75%very high
August Weather20°C (68°F)97 mm (3.8 inches)76%very high
September Weather17°C (63°F)93 mm (3.6 inches)79%high
October Weather11°C (53°F)142 mm (5.6 inches)83%moderate
November Weather4°C (40°F)94 mm (3.7 inches)86%moderate
December Weather0°C (32°F)87 mm (3.4 inches)87%low

Compare Frankfort's Climate with Cities Worldwide