nomadseason

September Weather in Richmond, United States

Last updated: June 24, 2025

In Richmond, United States, the average temperature in September is a pleasant 17°C (64°F). During this month, temperatures can dip to a chilly 1°C (34°F) at their lowest, while soaring up to a warm 31°C (88°F) at their highest. Visitors should prepare for 111 mm (4.4 in) of precipitation over about 9 days, and expect an average humidity level of 72% to accompany the fluctuating temperatures.

September Temperature in Richmond

In September in Richmond, the average temperature is 17°C (64°F). Maximums can reach 31°C (88°F) and minimums can be as low as 1°C (34°F). Be prepared for a wide range of temperatures and pack accordingly for your travels.

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 17°C (64°F), with highs reaching up to 31°C (88°F) and lows dropping to around 1°C (34°F).
JanFebMarAprMayJunJulAugSepOctNovDec252834465766727063533830
Data source: Temperature data for Richmond generated using information from the Copernicus Climate Change Service.
Choose your preferred temperature unit
The average of daily temperatures (24 hours) calculated across all days in the month.

September Precipitation in Richmond

In Richmond in September, the precipitation amount is 111 mm (4.4 in) over the course of 9 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 111 mm (4.4 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec81988713211585136107111152101113
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

September Humidity in Richmond

In Richmond in September humidity is 72%. With an average temperature of 17°C (64°F), this humidity feels like a warm, sticky embrace, making travel comfortable yet slightly muggy, especially during midday when the warmth is more pronounced.

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 72%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec90%88%86%84%76%72%67%64%72%81%87%85%
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 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 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 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec35681010998642
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.
 TemperaturePrecipitationHumidityUV
January Weather-4°C (26°F)81 mm (3.2 inches)89%moderate
February Weather-2°C (29°F)98 mm (3.9 inches)88%moderate
March Weather1°C (34°F)87 mm (3.4 inches)86%high
April Weather8°C (46°F)132 mm (5.2 inches)84%very high
May Weather14°C (57°F)115 mm (4.5 inches)76%very high
June Weather19°C (66°F)85 mm (3.4 inches)72%very high
July Weather22°C (72°F)136 mm (5.4 inches)66%very high
August Weather21°C (70°F)107 mm (4.2 inches)64%very high
September Weather17°C (64°F)111 mm (4.4 inches)72%very high
October Weather11°C (53°F)152 mm (6.0 inches)81%high
November Weather4°C (39°F)101 mm (4.0 inches)87%moderate
December Weather-1°C (30°F)113 mm (4.4 inches)84%low

Compare Richmond's Climate with Cities Worldwide