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September Weather in Lexington, United States

Last updated: June 24, 2025

In Lexington, United States, the average temperature in September hovers around 27°C (81°F), making it quite a warm escape. However, be prepared for temperature fluctuations, as the minimum can dip to 10°C (51°F), while the maximum can soar to 39°C (102°F). Rain lovers might note that 124 mm (4.9 in) of precipitation spreads over 11 days, contributing to an average humidity of 69%. Whether you're seeking sunshine or a refreshing shower, September in Lexington offers a bit of everything!

September Temperature in Lexington

In September in Lexington, the average temperature is 27°C (81°F). Maximums can reach 39°C (102°F), and minimums can be as low as 10°C (51°F). Be prepared for warm days and cooler nights when traveling during this month.

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 27°C (81°F), with highs reaching up to 39°C (102°F) and lows dropping to around 10°C (51°F).
JanFebMarAprMayJunJulAugSepOctNovDec525464687782858781716055
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 124 mm (4.9 in) over the course of 11 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 124 mm (4.9 inches) of precipitation spread over approximately 11 days.
JanFebMarAprMayJunJulAugSepOctNovDec646972118155100821181251006890
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 69%. With an average temperature of 27°C (81°F), this humidity feels like a warm blanket wrapped around you, making it essential to stay hydrated and take frequent breaks during your travels.

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 69%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec80%80%78%79%81%77%71%67%69%73%82%87%
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 reaches 10, which corresponds to a very high Exposure Category. With a time to burn of just 15 minutes, it's crucial to take precautions. For more 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 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec589111112121110865
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 Weather11°C (52°F)64 mm (2.5 inches)79%moderate
February Weather12°C (54°F)69 mm (2.7 inches)80%very high
March Weather18°C (64°F)72 mm (2.8 inches)78%very high
April Weather20°C (69°F)118 mm (4.7 inches)79%extreme
May Weather25°C (77°F)155 mm (6.1 inches)81%extreme
June Weather28°C (83°F)100 mm (3.9 inches)77%extreme
July Weather30°C (85°F)82 mm (3.2 inches)71%extreme
August Weather30°C (87°F)118 mm (4.6 inches)67%extreme
September Weather27°C (81°F)124 mm (4.9 inches)69%very high
October Weather22°C (71°F)100 mm (3.9 inches)73%very high
November Weather16°C (60°F)68 mm (2.7 inches)82%high
December Weather13°C (56°F)90 mm (3.5 inches)87%moderate

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