September Weather in La Grange, United States

Last updated: June 24, 2025

In September, the average temperature in La Grange, United States is a warm 27°C (81°F), making it an inviting destination. Expect minimums as low as 11°C (52°F) and highs reaching up to 39°C (102°F). Over the month, there's typically 120 mm (4.7 in) of precipitation spread across 11 days, contributing to an average humidity of 73%. Enjoy your time in this diverse climate!

September Temperature in La Grange

In September in La Grange, the average temperature is 27°C (81°F). Maximum temperatures can reach 39°C (102°F), while minimums can drop as low as 11°C (52°F). This diverse temperature range makes La Grange an ideal destination for travelers looking to experience both warm days and cooler evenings.

September Weather in La Grange: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in La Grange, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In La Grange, 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 11°C (52°F).

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

September Precipitation in La Grange

In La Grange in September, the precipitation amount is 120 mm (4.7 in) during a span of 11 days.

September Precipitation Trends in La Grange

The chart displays monthly precipitation patterns in La Grange, 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 La Grange, September typically receives around 120 mm (4.7 inches) of precipitation spread over approximately 11 days.

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

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Millimeters (mm) Inches (in)

September Humidity in La Grange

In La Grange in September, humidity is 73%. With an average temperature of 27°C (81°F), this humidity feels like a warm blanket enveloping you, making outdoor activities feel sticky and heavy, while also requiring frequent hydration breaks to stay comfortable during your travels.

September Average Humidity in La Grange

This chart illustrates the average monthly humidity levels in La Grange, 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 La Grange is approximately 73%, 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 La Grange

In La Grange 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 La Grange.

Maximum UV Index Levels in La Grange for September

The chart shows the monthly maximum UV Index (UVI) for La Grange 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 La Grange typically reaches 10, which falls under the very high exposure category.

Data source: La Grange 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 La Grange Compares to Other Months

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

This table compares monthly weather conditions in La Grange, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	12°C (53°F)	62 mm (2.4 inches)	78%	moderate
February Weather	13°C (55°F)	71 mm (2.8 inches)	81%	very high
March Weather	18°C (65°F)	73 mm (2.9 inches)	76%	very high
April Weather	21°C (70°F)	105 mm (4.1 inches)	79%	very high
May Weather	25°C (78°F)	145 mm (5.7 inches)	79%	extreme
June Weather	28°C (83°F)	112 mm (4.4 inches)	74%	extreme
July Weather	29°C (85°F)	94 mm (3.7 inches)	71%	extreme
August Weather	30°C (86°F)	138 mm (5.4 inches)	68%	extreme
September Weather	27°C (81°F)	120 mm (4.7 inches)	73%	very high
October Weather	22°C (72°F)	83 mm (3.3 inches)	75%	very high
November Weather	16°C (61°F)	67 mm (2.6 inches)	78%	high
December Weather	13°C (56°F)	86 mm (3.4 inches)	84%	moderate