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September Weather in Piedmont, United States

Last updated: June 24, 2025

In Piedmont, United States, the average temperature in September hovers around 23°C (74°F). Expect a minimum drop to 9°C (48°F) and peaks reaching 35°C (95°F). This month sees 132 mm (5.2 in) of precipitation spread over 9 days, contributing to an average humidity level of 76%.

September Temperature in Piedmont

In September in Piedmont, 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 Piedmont a great destination for travelers seeking a comfortable climate to explore outdoor activities and enjoy the local scenery.

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 23°C (74°F), with highs reaching up to 35°C (95°F) and lows dropping to around 9°C (48°F).
JanFebMarAprMayJunJulAugSepOctNovDec444954617076807874655147
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 total precipitation amount is 132 mm (5.2 in) over a span of 9 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 132 mm (5.2 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec99144109125138889312113213095130
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 76%. With an average temperature of 23°C (74°F), this humidity feels like a warm, thick blanket wrapping around you, making outdoor exploration feel a bit sluggish and requiring frequent breaks for hydration and respite from the heat.

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 76%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec86%86%86%82%85%85%83%76%76%80%88%88%
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.
JanFebMarAprMayJunJulAugSepOctNovDec46810111111109864
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 Weather7°C (44°F)99 mm (3.9 inches)86%moderate
February Weather10°C (50°F)144 mm (5.7 inches)86%high
March Weather12°C (54°F)109 mm (4.3 inches)86%very high
April Weather16°C (62°F)125 mm (4.9 inches)82%very high
May Weather21°C (70°F)137 mm (5.4 inches)85%extreme
June Weather24°C (76°F)87 mm (3.4 inches)85%extreme
July Weather26°C (80°F)93 mm (3.7 inches)83%extreme
August Weather26°C (79°F)121 mm (4.8 inches)76%very high
September Weather23°C (74°F)132 mm (5.2 inches)76%very high
October Weather18°C (65°F)129 mm (5.1 inches)80%very high
November Weather11°C (51°F)95 mm (3.7 inches)88%high
December Weather8°C (47°F)130 mm (5.1 inches)88%moderate

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