September Weather in Richmond, United States

Last updated: June 24, 2025

In September, the average temperature in Richmond, United States is a warm 27°C (80°F), with temperatures ranging from a minimum of 12°C (55°F) to a sizzling maximum of 37°C (99°F). Expect about 168 mm (6.6 in) of precipitation spread over 15 days, contributing to an average humidity of 73%. Plan your activities accordingly to make the most of this vibrant climate!

September Temperature in Richmond

In September in Richmond, the average temperature is 27°C (80°F). Maximums can reach 37°C (99°F), while minimums can drop to as low as 12°C (55°F). It's advisable to pack a mix of lightweight clothing for the warm days and some layers for the cooler evenings when traveling to Richmond.

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

The chart illustrates September temperature patterns in Richmond, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Richmond, September typically has an average temperature of 27°C (80°F), with highs reaching up to 37°C (99°F) and lows dropping to around 12°C (55°F).

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

September Precipitation in Richmond

In Richmond in September, the total precipitation amount is 168 mm (6.6 in) collected over a period of 15 days.

September Precipitation Trends in Richmond

The chart displays monthly precipitation patterns in Richmond, 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 Richmond, September typically receives around 168 mm (6.6 inches) of precipitation spread over approximately 15 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 Richmond

In Richmond in September humidity is 73%. With an average temperature of 27°C (80°F), this humidity feels like a warm, enveloping blanket that can make traveling feel sticky and slightly uncomfortable, prompting frequent breaks in the shade and plenty of hydration.

September Average Humidity in Richmond

This chart illustrates the average monthly humidity levels in Richmond, 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 Richmond is approximately 73%, 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 Richmond

In Richmond in September, the maximum UV index reaches 10, which corresponds to a very high Exposure Category. With a time to burn of just 15 minutes, it's crucial to take precautions. For more detailed information, you can check the Hourly UV Index in Richmond.

Maximum UV Index Levels in Richmond for September

The chart shows the monthly maximum UV Index (UVI) for Richmond 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 Richmond typically reaches 10, which falls under the very high exposure category.

Data source: Richmond 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 Richmond Compares to Other Months

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

This table compares monthly weather conditions in Richmond, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	13°C (55°F)	79 mm (3.1 inches)	78%	moderate
February Weather	15°C (59°F)	81 mm (3.2 inches)	81%	very high
March Weather	19°C (66°F)	72 mm (2.8 inches)	76%	very high
April Weather	21°C (71°F)	76 mm (3.0 inches)	79%	extreme
May Weather	26°C (78°F)	156 mm (6.1 inches)	79%	extreme
June Weather	28°C (83°F)	153 mm (6.0 inches)	74%	extreme
July Weather	29°C (84°F)	139 mm (5.5 inches)	71%	extreme
August Weather	29°C (85°F)	177 mm (7.0 inches)	68%	extreme
September Weather	27°C (80°F)	168 mm (6.6 inches)	73%	very high
October Weather	23°C (73°F)	86 mm (3.4 inches)	75%	very high
November Weather	17°C (63°F)	78 mm (3.1 inches)	78%	high
December Weather	15°C (59°F)	103 mm (4.0 inches)	84%	moderate