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September Weather in Graniteville, United States

Last updated: June 24, 2025

In September, the average temperature in Graniteville, United States hovers around 15°C (59°F), with daily extremes ranging from a chilly -4°C (24°F) to a warm 30°C (87°F). Expect 72 mm (2.8 in) of precipitation spread over 8 days, adding to the average humidity of 78% in this vibrant locale. Stay prepared for a mix of weather as you explore!

September Temperature in Graniteville

In September in Graniteville, the average temperature is 15°C (59°F). Maximums can reach 30°C (87°F), while minima can drop as low as -4°C (24°F). Be prepared for a diverse range of weather conditions during your travels, so pack accordingly!

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

The chart illustrates September temperature patterns in Graniteville, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Graniteville, September typically has an average temperature of 15°C (59°F), with highs reaching up to 30°C (87°F) and lows dropping to around -4°C (24°F).
JanFebMarAprMayJunJulAugSepOctNovDec182128415463686659483323
Data source: Temperature data for Graniteville 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 Graniteville

In Graniteville in September, the precipitation amount is 72 mm (2.8 in) over the course of 8 days.

September Precipitation Trends in Graniteville

The chart displays monthly precipitation patterns in Graniteville, 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 Graniteville, September typically receives around 72 mm (2.8 inches) of precipitation spread over approximately 8 days.
JanFebMarAprMayJunJulAugSepOctNovDec798174118100108136997214510786
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Graniteville

In Graniteville in September, humidity is 78%. With an average temperature of 15°C (59°F), this humidity feels like a warm, enveloping blanket that clings to your skin, making outdoor activities a bit more tiring and requiring frequent breaks for hydration as you explore the area.

September Average Humidity in Graniteville

This chart illustrates the average monthly humidity levels in Graniteville, 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 Graniteville is approximately 78%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec93%92%86%85%80%74%76%75%78%86%89%89%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Graniteville

In Graniteville in September, the maximum UV index is 7, which corresponds to the high Exposure Category. This means that the time to burn is approximately 25 minutes. For more detailed information, you can check the Hourly UV Index in Graniteville.

Maximum UV Index Levels in Graniteville for September

The chart shows the monthly maximum UV Index (UVI) for Graniteville 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 Graniteville typically reaches 7, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec2458910997532
Data source: Graniteville 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 Graniteville Compares to Other Months

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

This table compares monthly weather conditions in Graniteville, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-8°C (18°F)79 mm (3.1 inches)93%low
February Weather-6°C (21°F)81 mm (3.2 inches)92%moderate
March Weather-2°C (29°F)74 mm (2.9 inches)86%moderate
April Weather5°C (42°F)118 mm (4.6 inches)85%very high
May Weather12°C (54°F)100 mm (4.0 inches)80%very high
June Weather17°C (63°F)108 mm (4.3 inches)74%very high
July Weather20°C (68°F)136 mm (5.3 inches)76%very high
August Weather19°C (66°F)99 mm (3.9 inches)75%very high
September Weather15°C (59°F)72 mm (2.8 inches)78%high
October Weather9°C (48°F)145 mm (5.7 inches)86%moderate
November Weather0°C (33°F)107 mm (4.2 inches)88%moderate
December Weather-5°C (23°F)86 mm (3.4 inches)89%low

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