September Weather in Russellville, United States

Last updated: June 24, 2025

In Russellville, United States, the average temperature in September hovers around 21°C (70°F), offering a pleasant climate for outdoor activities. Expect fluctuations, as temperatures can dip to a cool 7°C (45°F) or soar up to a hot 35°C (96°F). Precipitation is also a factor, with approximately 113 mm (4.5 in) of rain spread over 8 days, contributing to the region's lush greenery. The average humidity levels sit at a comfortable 73%, making the air feel both refreshing and invigorating.

September Temperature in Russellville

In September in Russellville the average temperature is 21°C (70°F). The maximum can reach 35°C (96°F) and the minimum can be as low as 7°C (45°F). Overall, it's a perfect time for travelers to enjoy a variety of outdoor activities while being prepared for some temperature fluctuations.

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

The chart illustrates September temperature patterns in Russellville, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Russellville, September typically has an average temperature of 21°C (70°F), with highs reaching up to 35°C (96°F) and lows dropping to around 7°C (45°F).

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

September Precipitation in Russellville

In Russellville in September, the precipitation amount is 113 mm (4.5 in) over the course of 8 days.

September Precipitation Trends in Russellville

The chart displays monthly precipitation patterns in Russellville, 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 Russellville, September typically receives around 113 mm (4.5 inches) of precipitation spread over approximately 8 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 Russellville

In Russellville in September, humidity is 73%. With an average temperature of 21°C (70°F), this humidity feels like a warm embrace that can make outdoor activities feel sweltering, so it's essential to stay hydrated and take breaks in the shade while exploring.

September Average Humidity in Russellville

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

In Russellville 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 Russellville.

Maximum UV Index Levels in Russellville for September

The chart shows the monthly maximum UV Index (UVI) for Russellville 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 Russellville typically reaches 8, which falls under the very high exposure category.

Data source: Russellville 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 Russellville Compares to Other Months

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

This table compares monthly weather conditions in Russellville, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	1°C (35°F)	91 mm (3.6 inches)	88%	moderate
February Weather	4°C (39°F)	128 mm (5.1 inches)	88%	moderate
March Weather	8°C (46°F)	122 mm (4.8 inches)	87%	high
April Weather	13°C (55°F)	136 mm (5.4 inches)	85%	very high
May Weather	19°C (66°F)	130 mm (5.1 inches)	81%	very high
June Weather	23°C (73°F)	165 mm (6.5 inches)	82%	very high
July Weather	25°C (77°F)	119 mm (4.7 inches)	81%	very high
August Weather	24°C (75°F)	87 mm (3.4 inches)	73%	very high
September Weather	21°C (70°F)	113 mm (4.5 inches)	73%	very high
October Weather	15°C (60°F)	107 mm (4.2 inches)	78%	high
November Weather	7°C (45°F)	88 mm (3.5 inches)	89%	moderate
December Weather	4°C (40°F)	120 mm (4.7 inches)	87%	moderate