September Weather in Lambert, United States

Last updated: June 24, 2025

In September, the average temperature in Lambert, United States hovers around 25°C (77°F), offering a pleasant climate. Expect a minimum of 11°C (52°F) and a maximum reaching up to 37°C (99°F), ideal for various outdoor activities. However, be prepared for some rain, as the region sees approximately 108 mm (4.3 in) of precipitation over 6 days. With an average humidity of 71%, it's a perfect blend of warmth and moisture!

September Temperature in Lambert

In September in Lambert, the average temperature is 25°C (77°F). Maximums can reach 37°C (99°F), and minimums can be as low as 11°C (52°F). This weather makes Lambert an ideal destination for travelers seeking warm and pleasant conditions.

September Weather in Lambert: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Lambert, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Lambert, September typically has an average temperature of 25°C (77°F), with highs reaching up to 37°C (99°F) and lows dropping to around 11°C (52°F).

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

September Precipitation in Lambert

In Lambert in September, the precipitation amount is 108 mm (4.3 in) over the course of 6 days.

September Precipitation Trends in Lambert

The chart displays monthly precipitation patterns in Lambert, 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 Lambert, September typically receives around 108 mm (4.3 inches) of precipitation spread over approximately 6 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 Lambert

In Lambert in September humidity is 71%. With an average temperature of 25°C (77°F), this humidity feels like a warm embrace, making outdoor exploration a bit sticky but still enjoyable, especially if you take breaks in shaded areas and stay hydrated.

September Average Humidity in Lambert

This chart illustrates the average monthly humidity levels in Lambert, 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 Lambert is approximately 71%, 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 Lambert

In Lambert 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 Lambert.

Maximum UV Index Levels in Lambert for September

The chart shows the monthly maximum UV Index (UVI) for Lambert 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 Lambert typically reaches 9, which falls under the very high exposure category.

Data source: Lambert 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 Lambert Compares to Other Months

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

This table compares monthly weather conditions in Lambert, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	7°C (45°F)	115 mm (4.5 inches)	84%	moderate
February Weather	9°C (48°F)	198 mm (7.8 inches)	83%	high
March Weather	14°C (57°F)	166 mm (6.5 inches)	81%	very high
April Weather	17°C (62°F)	146 mm (5.8 inches)	81%	very high
May Weather	22°C (73°F)	127 mm (5.0 inches)	83%	extreme
June Weather	26°C (79°F)	129 mm (5.1 inches)	83%	extreme
July Weather	28°C (82°F)	121 mm (4.7 inches)	81%	extreme
August Weather	27°C (81°F)	120 mm (4.7 inches)	74%	very high
September Weather	25°C (77°F)	108 mm (4.3 inches)	71%	very high
October Weather	19°C (66°F)	104 mm (4.1 inches)	76%	high
November Weather	11°C (52°F)	84 mm (3.3 inches)	84%	high
December Weather	9°C (49°F)	144 mm (5.7 inches)	88%	moderate