September Weather in Summersville, United States

Last updated: June 24, 2025

In September, the average temperature in Summersville, United States hovers around 19°C (66°F), creating a pleasant atmosphere for visitors. Expect minimums of 3°C (39°F) and maximums of 31°C (88°F), providing a wide range of experiences throughout the day. Be prepared for approximately 110 mm (4.3 in) of precipitation over 11 days, accompanied by an average humidity of 73%, ensuring a lush and vibrant landscape.

September Temperature in Summersville

In September in Summersville, the average temperature is 19°C (66°F). Maximums can reach 31°C (88°F), while minimums can be as low as 3°C (39°F). This variation in temperature makes Summersville an ideal destination for travelers seeking both warm days and cooler evenings.

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

The chart illustrates September temperature patterns in Summersville, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Summersville, September typically has an average temperature of 19°C (66°F), with highs reaching up to 31°C (88°F) and lows dropping to around 3°C (39°F).

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

September Precipitation in Summersville

In Summersville in September, the precipitation amount is 110 mm (4.3 in) spread over 11 days.

September Precipitation Trends in Summersville

The chart displays monthly precipitation patterns in Summersville, 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 Summersville, September typically receives around 110 mm (4.3 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 Summersville

In Summersville in September humidity is 73%. With an average temperature of 19°C (66°F), this humidity feels like a warm embrace, making travel enjoyable yet slightly sticky, as you find yourself seeking shade and refreshing drinks while exploring.

September Average Humidity in Summersville

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

In Summersville 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 Summersville.

Maximum UV Index Levels in Summersville for September

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

Data source: Summersville 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 Summersville Compares to Other Months

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

This table compares monthly weather conditions in Summersville, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	0°C (32°F)	110 mm (4.3 inches)	88%	moderate
February Weather	3°C (38°F)	171 mm (6.7 inches)	88%	moderate
March Weather	6°C (43°F)	133 mm (5.2 inches)	88%	high
April Weather	11°C (52°F)	158 mm (6.2 inches)	86%	very high
May Weather	16°C (62°F)	177 mm (7.0 inches)	82%	very high
June Weather	20°C (68°F)	150 mm (5.9 inches)	84%	extreme
July Weather	22°C (72°F)	129 mm (5.1 inches)	82%	extreme
August Weather	21°C (70°F)	133 mm (5.3 inches)	73%	very high
September Weather	19°C (66°F)	110 mm (4.3 inches)	73%	very high
October Weather	13°C (56°F)	131 mm (5.2 inches)	81%	high
November Weather	6°C (42°F)	90 mm (3.5 inches)	89%	moderate
December Weather	3°C (38°F)	134 mm (5.3 inches)	86%	moderate