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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 15°C (59°F), with fluctuations ranging from a brisk -4°C (25°F) to a sizzling 36°C (98°F). Expect about 53 mm (2.1 in) of precipitation spread over 7 days, contributing to an average humidity level of 77%. This blend of temperature and moisture makes for a unique climate experience!

September Temperature in Piedmont

In September in Piedmont, the average temperature is 15°C (59°F). Maximum temperatures can reach 36°C (98°F), while minimums can drop as low as -4°C (25°F). Be prepared for a wide range of temperatures and pack accordingly for your travels!

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 15°C (59°F), with highs reaching up to 36°C (98°F) and lows dropping to around -4°C (25°F).
JanFebMarAprMayJunJulAugSepOctNovDec272134395064696659433629
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 53 mm (2.1 in) spread over a period of 7 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 53 mm (2.1 inches) of precipitation spread over approximately 7 days.
JanFebMarAprMayJunJulAugSepOctNovDec203449881301081308253652132
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 77%. With an average temperature of 15°C (59°F), this humidity feels like a warm blanket enveloping you, making it essential to stay hydrated and choose light, breathable clothing for comfortable travel.

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 77%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec78%80%70%70%76%84%85%85%77%73%74%79%
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 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more detailed information, you can refer to 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 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec346991111108532
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 Weather-3°C (27°F)20 mm (0.8 inches)77%moderate
February Weather-6°C (21°F)34 mm (1.3 inches)80%moderate
March Weather1°C (35°F)49 mm (1.9 inches)70%high
April Weather4°C (39°F)88 mm (3.5 inches)70%very high
May Weather10°C (50°F)130 mm (5.1 inches)76%very high
June Weather18°C (64°F)108 mm (4.2 inches)84%extreme
July Weather21°C (70°F)130 mm (5.1 inches)85%extreme
August Weather19°C (67°F)82 mm (3.2 inches)84%very high
September Weather15°C (59°F)53 mm (2.1 inches)77%very high
October Weather6°C (43°F)65 mm (2.6 inches)73%moderate
November Weather2°C (36°F)21 mm (0.8 inches)74%moderate
December Weather-1°C (30°F)32 mm (1.3 inches)79%low

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