September Weather in Lexington, United States

Last updated: June 24, 2025

In Lexington, United States, the average temperature during September hovers around 20°C (68°F). However, brace yourself for temperature fluctuations, as it can dip to a brisk 3°C (37°F) and soar to a sweltering 35°C (96°F). Precipitation is moderate, with an average of 52 mm (2.1 in) spread over 5 days, and the air tends to be quite humid, with levels around 77%.

September Temperature in Lexington

In September in Lexington, the average temperature is 20°C (68°F). Maximum temperatures can reach 35°C (96°F), while minimums can drop as low as 3°C (37°F). This range makes it a perfect time for travelers to enjoy a variety of outdoor activities, from warm afternoons to cooler evenings.

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 20°C (68°F), with highs reaching up to 35°C (96°F) and lows dropping to around 3°C (37°F).

Data source: Temperature data for Lexington generated using information from the Copernicus Climate Change Service.

September Precipitation in Lexington

In Lexington in September, the precipitation amount is 52 mm (2.1 in) over a period of 5 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 52 mm (2.1 inches) of precipitation spread over approximately 5 days.

Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

September Humidity in Lexington

In Lexington in September, humidity is 77%. With an average temperature of 20°C (68°F), this humidity feels like a warm, sticky embrace, making it essential for travelers to stay hydrated and take breaks in shaded areas to avoid feeling sluggish in the heat.

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 77%, offering insight into how humid the weather typically is during this month.

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 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more detailed information, you can refer to 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 8, which falls under the very high exposure category.

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.
	Temperature	Precipitation	Humidity	UV
January Weather	-3°C (27°F)	20 mm (0.8 inches)	73%	moderate
February Weather	-3°C (26°F)	22 mm (0.9 inches)	81%	moderate
March Weather	4°C (40°F)	74 mm (2.9 inches)	69%	high
April Weather	9°C (49°F)	44 mm (1.7 inches)	71%	very high
May Weather	15°C (60°F)	147 mm (5.8 inches)	80%	very high
June Weather	23°C (74°F)	64 mm (2.5 inches)	83%	extreme
July Weather	25°C (77°F)	72 mm (2.8 inches)	84%	extreme
August Weather	23°C (74°F)	71 mm (2.8 inches)	84%	very high
September Weather	20°C (68°F)	52 mm (2.1 inches)	77%	very high
October Weather	10°C (51°F)	67 mm (2.6 inches)	72%	high
November Weather	4°C (40°F)	17 mm (0.7 inches)	80%	moderate
December Weather	-1°C (31°F)	35 mm (1.4 inches)	79%	moderate