September Weather in Clinton, United States

Last updated: June 24, 2025

In September, the average temperature in Clinton, United States hovers around 16°C (62°F). Expect fluctuations, with minimums dipping to 1°C (33°F) and maximums soaring to 32°C (89°F). With an average precipitation of 69 mm (2.7 in) spread over 7 days, don't forget your umbrella! The humidity level is generally high at 77%, making for a vibrant, lush atmosphere.

September Temperature in Clinton

In September in Clinton, the average temperature is 16°C (62°F). Maximums can reach 32°C (89°F) and minimums can be as low as 1°C (33°F). It's a great time to visit Clinton, as you can experience mild weather with the possibility of both warm and cooler days.

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

The chart illustrates September temperature patterns in Clinton, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Clinton, September typically has an average temperature of 16°C (62°F), with highs reaching up to 32°C (89°F) and lows dropping to around 1°C (33°F).

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

September Precipitation in Clinton

In Clinton in September, the precipitation amount is 69 mm (2.7 in) over the course of 7 days.

September Precipitation Trends in Clinton

The chart displays monthly precipitation patterns in Clinton, 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 Clinton, September typically receives around 69 mm (2.7 inches) of precipitation spread over approximately 7 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 Clinton

In Clinton in September, humidity is 77%. With an average temperature of 16°C (62°F), this humidity feels like a warm, enveloping blanket that can make outdoor activities feel heavy and draining, so travelers may want to plan for breaks in shaded areas and stay hydrated.

September Average Humidity in Clinton

This chart illustrates the average monthly humidity levels in Clinton, 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 Clinton 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 Clinton

In Clinton 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 Clinton.

Maximum UV Index Levels in Clinton for September

The chart shows the monthly maximum UV Index (UVI) for Clinton 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 Clinton typically reaches 7, which falls under the high exposure category.

Data source: Clinton 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 Clinton Compares to Other Months

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

This table compares monthly weather conditions in Clinton, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-6°C (21°F)	84 mm (3.3 inches)	88%	low
February Weather	-5°C (23°F)	80 mm (3.2 inches)	88%	moderate
March Weather	-1°C (31°F)	72 mm (2.8 inches)	85%	moderate
April Weather	6°C (43°F)	119 mm (4.7 inches)	81%	high
May Weather	12°C (55°F)	89 mm (3.5 inches)	76%	very high
June Weather	18°C (65°F)	73 mm (2.9 inches)	74%	very high
July Weather	21°C (70°F)	110 mm (4.3 inches)	74%	very high
August Weather	21°C (69°F)	72 mm (2.8 inches)	74%	very high
September Weather	16°C (62°F)	69 mm (2.7 inches)	77%	high
October Weather	10°C (50°F)	119 mm (4.7 inches)	82%	moderate
November Weather	2°C (36°F)	108 mm (4.3 inches)	85%	moderate
December Weather	-4°C (25°F)	109 mm (4.3 inches)	84%	low