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September Weather in Piedmont, United States

Last updated: June 24, 2025

In September, the average temperature in Piedmont, United States hovers around 19°C (67°F). Expect minimum temperatures as low as 3°C (38°F) and delightful highs of 33°C (91°F). With 93 mm (3.7 in) of precipitation spread over 10 days, and an average humidity of 68%, this month offers a refreshing yet varied climate, perfect for exploration and adventure!

September Temperature in Piedmont

In September in Piedmont, the average temperature is 19°C (67°F). Maximums can reach 33°C (91°F), and minimums can be as low as 3°C (38°F). This makes Piedmont a great destination for travelers seeking mild weather and a chance to enjoy a variety of outdoor activities.

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

The chart illustrates September temperature patterns in Piedmont, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Piedmont, September typically has an average temperature of 19°C (67°F), with highs reaching up to 33°C (91°F) and lows dropping to around 3°C (38°F).
JanFebMarAprMayJunJulAugSepOctNovDec344045536268727166574339
Data source: Temperature data for Piedmont 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 Piedmont

In Piedmont in September, the precipitation amount is 93 mm (3.7 in) over the course of 10 days.

September Precipitation Trends in Piedmont

The chart displays monthly precipitation patterns in Piedmont, 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 Piedmont, September typically receives around 93 mm (3.7 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec97153122130149123811019312477116
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Piedmont

In Piedmont in September, humidity is 68%. With an average temperature of 19°C (67°F), this humidity feels like a warm, enveloping blanket, making travel pleasant yet slightly muggy, which can be refreshing while exploring but may require occasional breaks to stay comfortable.

September Average Humidity in Piedmont

This chart illustrates the average monthly humidity levels in Piedmont, 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 Piedmont is approximately 68%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec87%87%86%84%83%83%79%66%68%78%89%86%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Piedmont

In Piedmont 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 Piedmont.

Maximum UV Index Levels in Piedmont for September

The chart shows the monthly maximum UV Index (UVI) for Piedmont 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 Piedmont typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec36810111111109753
Data source: Piedmont 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 Piedmont Compares to Other Months

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

This table compares monthly weather conditions in Piedmont, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather1°C (34°F)97 mm (3.8 inches)87%moderate
February Weather4°C (40°F)153 mm (6.0 inches)87%high
March Weather7°C (45°F)122 mm (4.8 inches)86%very high
April Weather11°C (53°F)130 mm (5.1 inches)84%very high
May Weather17°C (62°F)149 mm (5.9 inches)83%extreme
June Weather20°C (68°F)123 mm (4.8 inches)83%extreme
July Weather22°C (73°F)81 mm (3.2 inches)79%extreme
August Weather21°C (71°F)101 mm (4.0 inches)66%very high
September Weather19°C (67°F)93 mm (3.7 inches)68%very high
October Weather14°C (57°F)124 mm (4.9 inches)78%high
November Weather6°C (43°F)77 mm (3.0 inches)89%moderate
December Weather4°C (39°F)116 mm (4.5 inches)86%moderate

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