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September Weather in Summersville, United States

Last updated: June 24, 2025

In September, the average temperature in Summersville, United States hovers around 22°C (72°F). Expect a range from a chilly 8°C (47°F) to a sweltering 36°C (97°F). During this time, precipitation totals 122 mm (4.8 in) over approximately 9 days, complemented by an average humidity of 71%. Stay prepared for a mix of sunny and rainy spells!

September Temperature in Summersville

In September in Summersville, the average temperature is 22°C (72°F), with maximums reaching 36°C (97°F) and minimums dropping as low as 8°C (47°F). This weather makes it an ideal time for outdoor activities and exploring the local attractions while enjoying comfortable temperatures.

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 22°C (72°F), with highs reaching up to 36°C (97°F) and lows dropping to around 8°C (47°F).
JanFebMarAprMayJunJulAugSepOctNovDec384350576875797772624643
Data source: Temperature data for Summersville generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

September Precipitation in Summersville

In Summersville in September, the precipitation amount is 122 mm (4.8 in) over a span of 9 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 122 mm (4.8 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec10017913914311516112411112212588144
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Summersville

In Summersville in September humidity is 71%. With an average temperature of 22°C (72°F), this humidity feels like the air is thick and slightly stifling, making outdoor activities require frequent breaks to stay hydrated and cool.

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 71%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec87%86%86%82%83%83%80%74%71%78%88%88%
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.
JanFebMarAprMayJunJulAugSepOctNovDec3679101111109753
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.
 TemperaturePrecipitationHumidityUV
January Weather3°C (38°F)100 mm (3.9 inches)87%moderate
February Weather6°C (43°F)179 mm (7.0 inches)86%high
March Weather10°C (50°F)139 mm (5.5 inches)86%high
April Weather14°C (58°F)143 mm (5.6 inches)82%very high
May Weather20°C (69°F)115 mm (4.5 inches)82%very high
June Weather24°C (75°F)161 mm (6.4 inches)83%extreme
July Weather26°C (79°F)124 mm (4.9 inches)80%extreme
August Weather25°C (77°F)111 mm (4.4 inches)74%very high
September Weather22°C (72°F)122 mm (4.8 inches)71%very high
October Weather16°C (62°F)125 mm (4.9 inches)78%high
November Weather8°C (47°F)88 mm (3.5 inches)88%moderate
December Weather6°C (43°F)144 mm (5.7 inches)88%moderate

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