nomadseason

September Weather in Fountain Inn, United States

Last updated: June 24, 2025

In Fountain Inn, United States, the average temperature in September is a pleasant 23°C (74°F). However, be prepared for temperature variations, with a minimum as low as 9°C (48°F) and soaring highs up to 35°C (95°F). During this month, expect about 131 mm (5.2 in) of precipitation spread over 9 days, and the air will be quite humid, with an average humidity of 75%.

September Temperature in Fountain Inn

In September in Fountain Inn, the average temperature is 23°C (74°F). Maximums can reach 35°C (95°F), and minimums can be as low as 9°C (48°F). This makes Fountain Inn a great destination for travelers seeking a comfortable climate to explore outdoor activities and enjoy the local scenery.

September Weather in Fountain Inn: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Fountain Inn, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Fountain Inn, September typically has an average temperature of 23°C (74°F), with highs reaching up to 35°C (95°F) and lows dropping to around 9°C (48°F).
JanFebMarAprMayJunJulAugSepOctNovDec444954627076807974655147
Data source: Temperature data for Fountain Inn generated using information from the Copernicus Climate Change Service.
Choose your preferred temperature unit
The average of daily temperatures (24 hours) calculated across all days in the month.

September Precipitation in Fountain Inn

In Fountain Inn in September, the precipitation amount is 131 mm (5.2 in) over the course of 9 days.

September Precipitation Trends in Fountain Inn

The chart displays monthly precipitation patterns in Fountain Inn, 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 Fountain Inn, September typically receives around 131 mm (5.2 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec931331051211378910212813111795123
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

September Humidity in Fountain Inn

In Fountain Inn in September, humidity is 75%. With an average temperature of 23°C (74°F), this humidity feels like a warm, heavy blanket wrapping around you, making it feel more sweltering than it actually is, which can be quite uncomfortable for traveling.

September Average Humidity in Fountain Inn

This chart illustrates the average monthly humidity levels in Fountain Inn, 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 Fountain Inn is approximately 75%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec86%85%84%82%83%82%80%74%75%79%87%87%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Fountain Inn

In Fountain Inn 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 Fountain Inn.

Maximum UV Index Levels in Fountain Inn for September

The chart shows the monthly maximum UV Index (UVI) for Fountain Inn 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 Fountain Inn typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec46810111111109864
Data source: Fountain Inn 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 Fountain Inn Compares to Other Months

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

This table compares monthly weather conditions in Fountain Inn, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather7°C (44°F)93 mm (3.7 inches)86%moderate
February Weather10°C (50°F)133 mm (5.2 inches)85%high
March Weather12°C (55°F)105 mm (4.1 inches)84%very high
April Weather17°C (62°F)121 mm (4.8 inches)82%very high
May Weather21°C (71°F)137 mm (5.4 inches)83%extreme
June Weather25°C (77°F)89 mm (3.5 inches)82%extreme
July Weather27°C (80°F)102 mm (4.0 inches)80%extreme
August Weather26°C (79°F)128 mm (5.0 inches)74%very high
September Weather23°C (74°F)131 mm (5.2 inches)75%very high
October Weather18°C (65°F)117 mm (4.6 inches)79%very high
November Weather11°C (51°F)95 mm (3.7 inches)87%high
December Weather8°C (47°F)123 mm (4.8 inches)87%moderate

Compare Fountain Inn's Climate with Cities Worldwide