September Weather in Clinton, United States

Last updated: June 24, 2025

In Clinton, United States, the average temperature in September hovers around 26°C (79°F). Expect a minimum of 12°C (54°F) and a maximum that can soar to 37°C (99°F). During this month, precipitation typically reaches 126 mm (5.0 in) over 13 days, contributing to an average humidity of 79%. Stay prepared for a mix of warmth and occasional showers!

September Temperature in Clinton

In September in Clinton, the average temperature is 26°C (79°F). Maximums can reach 37°C (99°F), and minimums can be as low as 12°C (54°F). This makes Clinton an ideal destination for travelers seeking warm weather while still having the option for cooler evenings.

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 26°C (79°F), with highs reaching up to 37°C (99°F) and lows dropping to around 12°C (54°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 126 mm (5.0 in) over the course of 13 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 126 mm (5.0 inches) of precipitation spread over approximately 13 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 79%. With an average temperature of 26°C (79°F), this humidity feels like a warm, sticky embrace that can make outdoor activities feel exhausting. Travelers should be prepared for a heavy air that clings to the skin, making hydration essential while navigating the sights and sounds of the city.

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 79%, 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 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 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 10, which falls under the very 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	11°C (52°F)	121 mm (4.8 inches)	83%	moderate
February Weather	14°C (57°F)	126 mm (4.9 inches)	83%	very high
March Weather	17°C (64°F)	96 mm (3.8 inches)	80%	very high
April Weather	19°C (67°F)	162 mm (6.4 inches)	81%	extreme
May Weather	24°C (75°F)	160 mm (6.3 inches)	81%	extreme
June Weather	26°C (80°F)	168 mm (6.6 inches)	78%	extreme
July Weather	27°C (82°F)	176 mm (6.9 inches)	79%	extreme
August Weather	27°C (81°F)	158 mm (6.2 inches)	79%	extreme
September Weather	26°C (79°F)	126 mm (5.0 inches)	79%	very high
October Weather	22°C (71°F)	115 mm (4.5 inches)	77%	very high
November Weather	15°C (59°F)	86 mm (3.4 inches)	85%	high
December Weather	13°C (55°F)	128 mm (5.0 inches)	88%	moderate