September Weather in Danville, United States

Last updated: June 24, 2025

In September, the average temperature in Danville, United States hovers around 20°C (68°F), offering a pleasant climate for outdoor activities. However, temperatures can fluctuate, with a minimum of 5°C (41°F) and a maximum of 34°C (93°F). Be prepared for some rain, as precipitation amounts to 90 mm (3.6 in) over approximately 10 days. With an average humidity of 77%, the air can feel quite muggy, making it a great time to enjoy refreshing drinks and breezy settings!

September Temperature in Danville

In September in Danville, the average temperature is 20°C (68°F). Maximums can reach 34°C (93°F) and minimums can be as low as 5°C (41°F). Travelers should be prepared for warm days and cool nights, making layering essentials for this time of year.

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 20°C (68°F), with highs reaching up to 34°C (93°F) and lows dropping to around 5°C (41°F).

Data source: Temperature data for Danville generated using information from the Copernicus Climate Change Service.

September Precipitation in Danville

In Danville in September, the precipitation amount is 90 mm (3.6 in) spread over the course of 10 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 90 mm (3.6 inches) of precipitation spread over approximately 10 days.

Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

September Humidity in Danville

In Danville in September, humidity is 77%. With an average temperature of 20°C (68°F), this humidity feels like a warm, sticky embrace, making it essential for travelers to stay hydrated and take breaks in shaded areas to avoid feeling sluggish in the heat.

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 77%, offering insight into how humid the weather typically is during this month.

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.

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.
	Temperature	Precipitation	Humidity	UV
January Weather	-1°C (30°F)	82 mm (3.2 inches)	88%	moderate
February Weather	1°C (33°F)	100 mm (3.9 inches)	88%	moderate
March Weather	5°C (41°F)	105 mm (4.1 inches)	87%	high
April Weather	11°C (51°F)	132 mm (5.2 inches)	87%	very high
May Weather	17°C (63°F)	120 mm (4.7 inches)	81%	very high
June Weather	22°C (71°F)	126 mm (5.0 inches)	83%	very high
July Weather	24°C (75°F)	113 mm (4.5 inches)	82%	very high
August Weather	23°C (73°F)	80 mm (3.1 inches)	76%	very high
September Weather	20°C (68°F)	90 mm (3.6 inches)	77%	very high
October Weather	14°C (57°F)	102 mm (4.0 inches)	82%	high
November Weather	5°C (42°F)	93 mm (3.7 inches)	89%	moderate
December Weather	2°C (36°F)	95 mm (3.7 inches)	86%	low