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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 18°C (65°F). Expect a range that dips to a minimum of 8°C (47°F) and peaks at a warm 29°C (85°F). The area sees about 78 mm (3.1 in) of precipitation spread over 11 days, contributing to an average humidity of 80%. Enjoy the mild weather, but don't forget to carry an umbrella!

September Temperature in Lexington

In September in Lexington, the average temperature is 18°C (65°F), with maximums reaching 29°C (85°F) and minimums dropping as low as 8°C (47°F). This climate makes it an ideal time for travelers to enjoy pleasant outdoor activities.

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 18°C (65°F), with highs reaching up to 29°C (85°F) and lows dropping to around 8°C (47°F).
JanFebMarAprMayJunJulAugSepOctNovDec272733415163717165544033
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 78 mm (3.1 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 78 mm (3.1 inches) of precipitation spread over approximately 11 days.
JanFebMarAprMayJunJulAugSepOctNovDec72757010696776981781208365
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 80%. With an average temperature of 18°C (65°F), this humidity feels like wandering through a warm, damp blanket, making every step slightly heavy and resulting in a constant sheen of sweat, which can be both refreshing and exhausting for travelers.

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 80%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec88%87%85%86%80%80%80%81%80%84%90%86%
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 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 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 7, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec2458910997532
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 Weather-3°C (27°F)71 mm (2.8 inches)88%low
February Weather-3°C (27°F)75 mm (3.0 inches)87%moderate
March Weather0°C (33°F)70 mm (2.8 inches)85%moderate
April Weather5°C (41°F)106 mm (4.2 inches)86%very high
May Weather11°C (51°F)96 mm (3.8 inches)80%very high
June Weather17°C (63°F)77 mm (3.0 inches)80%very high
July Weather22°C (71°F)69 mm (2.7 inches)80%very high
August Weather22°C (71°F)81 mm (3.2 inches)80%very high
September Weather18°C (65°F)78 mm (3.1 inches)80%high
October Weather12°C (55°F)120 mm (4.7 inches)84%moderate
November Weather5°C (41°F)83 mm (3.3 inches)89%moderate
December Weather1°C (33°F)65 mm (2.5 inches)86%low

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