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September Weather in Lexington, United States

Last updated: June 24, 2025

In September, the average temperature in Lexington, United States is a pleasant 24°C (75°F). However, temperatures can vary significantly, with a minimum of 9°C (48°F) and a maximum reaching up to 36°C (97°F). Expect some rain, as 108 mm (4.2 in) of precipitation typically falls over 9 days, accompanied by an average humidity of 64%.

September Temperature in Lexington

In September in Lexington, the average temperature is 24°C (75°F). Maximums can reach 36°C (97°F), and minimums can be as low as 9°C (48°F). It's a great time to visit for those who enjoy warm weather, but be prepared for occasional temperature fluctuations.

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

The chart illustrates September temperature patterns in Lexington, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Lexington, September typically has an average temperature of 24°C (75°F), with highs reaching up to 36°C (97°F) and lows dropping to around 9°C (48°F).
JanFebMarAprMayJunJulAugSepOctNovDec434755617177807975645047
Data source: Temperature data for Lexington 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 Lexington

In Lexington in September, the precipitation amount is 108 mm (4.2 in) spread over 9 days.

September Precipitation Trends in Lexington

The chart displays monthly precipitation patterns in Lexington, 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 Lexington, September typically receives around 108 mm (4.2 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec12619419515811412312210710811476159
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Lexington

In Lexington in September humidity is 64%. With average temperature 24°C (75°F), this humidity feels like a warm blanket enveloping you, making outdoor exploration both refreshing and a little sticky, perfect for leisurely strolls and shaded cafes but with a need for frequent water breaks.

September Average Humidity in Lexington

This chart illustrates the average monthly humidity levels in Lexington, 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 Lexington is approximately 64%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec87%87%85%82%83%82%78%67%64%75%87%89%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Lexington

In Lexington 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 Lexington.

Maximum UV Index Levels in Lexington for September

The chart shows the monthly maximum UV Index (UVI) for Lexington 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 Lexington typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec46810101111109753
Data source: Lexington 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 Lexington Compares to Other Months

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

This table compares monthly weather conditions in Lexington, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather6°C (43°F)126 mm (5.0 inches)87%moderate
February Weather9°C (48°F)194 mm (7.6 inches)87%high
March Weather13°C (55°F)195 mm (7.7 inches)85%very high
April Weather16°C (61°F)158 mm (6.2 inches)82%very high
May Weather21°C (71°F)114 mm (4.5 inches)83%very high
June Weather25°C (77°F)123 mm (4.8 inches)82%extreme
July Weather27°C (80°F)122 mm (4.8 inches)78%extreme
August Weather26°C (79°F)107 mm (4.2 inches)67%very high
September Weather24°C (75°F)108 mm (4.2 inches)64%very high
October Weather18°C (65°F)114 mm (4.5 inches)74%high
November Weather10°C (50°F)76 mm (3.0 inches)87%moderate
December Weather8°C (47°F)159 mm (6.3 inches)88%moderate

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