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September Weather in Lexington, United States

Last updated: June 24, 2025

In September, the average temperature in Lexington, United States hovers around 24°C (75°F). However, you can expect a minimum of 9°C (49°F) and a maximum of 38°C (100°F). With 115 mm (4.5 in) of precipitation spread over 8 rainy days, the average humidity sits at a comfortable 70%. Prepare for a mix of warm sunshine and refreshing showers!

September Temperature in Lexington

In September, in Lexington, the average temperature is 24°C (75°F). Maximum temperatures can reach 38°C (100°F), while minimums can drop as low as 9°C (49°F). Be prepared for a comfortable climate with warm days and cooler nights, making it an ideal time for outdoor adventures.

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 38°C (100°F) and lows dropping to around 9°C (49°F).
JanFebMarAprMayJunJulAugSepOctNovDec414554597077817975634946
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 115 mm (4.5 in) over the course of 8 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 115 mm (4.5 inches) of precipitation spread over approximately 8 days.
JanFebMarAprMayJunJulAugSepOctNovDec10318017116711911113010911512687143
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 70%. With an average temperature of 24°C (75°F), this humidity feels like a warm, heavy blanket wrapping around you, making outdoor activities a bit sluggish and sticky, ideal for leisurely strolls but requiring plenty of hydration.

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 70%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec86%85%84%81%83%83%80%74%70%73%85%88%
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.
JanFebMarAprMayJunJulAugSepOctNovDec46710111111109753
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 Weather5°C (41°F)103 mm (4.1 inches)86%moderate
February Weather7°C (45°F)180 mm (7.1 inches)85%high
March Weather12°C (54°F)171 mm (6.7 inches)84%high
April Weather15°C (60°F)167 mm (6.6 inches)81%very high
May Weather21°C (71°F)119 mm (4.7 inches)83%extreme
June Weather25°C (78°F)111 mm (4.4 inches)83%extreme
July Weather27°C (81°F)130 mm (5.1 inches)80%extreme
August Weather26°C (79°F)109 mm (4.3 inches)73%very high
September Weather24°C (75°F)115 mm (4.5 inches)70%very high
October Weather17°C (64°F)126 mm (5.0 inches)73%high
November Weather9°C (49°F)87 mm (3.4 inches)85%moderate
December Weather8°C (46°F)143 mm (5.6 inches)88%moderate

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