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September Weather in Danville, United States

Last updated: June 24, 2025

The average temperature in Danville, United States during September is a pleasant 19°C (67°F). However, temperatures can vary significantly, with minimums dropping to 2°C (36°F) and maximums soaring to 33°C (91°F). Expect approximately 111 mm (4.4 in) of precipitation over 9 days, contributing to an average humidity of 66%.

September Temperature in Danville

In September in Danville, the average temperature is 19°C (67°F), with maximums reaching 33°C (91°F) and minimums dropping as low as 2°C (36°F). This wide range of temperatures makes Danville a versatile destination for travelers, so be sure to pack for both warm and cool conditions.

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

The chart illustrates September temperature patterns in Danville, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Danville, 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 2°C (36°F).
JanFebMarAprMayJunJulAugSepOctNovDec303339506170757367574235
Data source: Temperature data for Danville 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 Danville

In Danville in September, the precipitation amount is 111 mm (4.4 in) over the course of 9 days.

September Precipitation Trends in Danville

The chart displays monthly precipitation patterns in Danville, 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 Danville, September typically receives around 111 mm (4.4 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec7310190105126941301241111159488
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Danville

In Danville in September humidity is 66%. With an average temperature of 19°C (67°F), this humidity feels like a warm blanket wrapping around you, making it mildly uncomfortable for traveling, as you may find yourself needing to frequently stop for hydration and to seek shade from the sun.

September Average Humidity in Danville

This chart illustrates the average monthly humidity levels in Danville, 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 Danville is approximately 66%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec87%85%85%83%75%74%65%62%66%79%87%85%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Danville

In Danville 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 Danville.

Maximum UV Index Levels in Danville for September

The chart shows the monthly maximum UV Index (UVI) for Danville 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 Danville typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec356910101098642
Data source: Danville 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 Danville Compares to Other Months

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

This table compares monthly weather conditions in Danville, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-1°C (30°F)72 mm (2.9 inches)87%moderate
February Weather1°C (33°F)101 mm (4.0 inches)85%moderate
March Weather4°C (40°F)90 mm (3.5 inches)85%high
April Weather10°C (50°F)105 mm (4.1 inches)83%very high
May Weather16°C (61°F)126 mm (4.9 inches)75%very high
June Weather21°C (70°F)94 mm (3.7 inches)73%very high
July Weather24°C (75°F)130 mm (5.1 inches)65%very high
August Weather23°C (73°F)124 mm (4.9 inches)62%very high
September Weather19°C (67°F)111 mm (4.4 inches)66%very high
October Weather14°C (57°F)115 mm (4.5 inches)79%high
November Weather5°C (42°F)94 mm (3.7 inches)87%moderate
December Weather2°C (35°F)88 mm (3.5 inches)85%low

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