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September Weather in Richmond, United States

Last updated: June 24, 2025

In September, the average temperature in Richmond, United States rests at a comfortable 22°C (72°F). Expect a range from a cool 8°C (46°F) to a sizzling 36°C (97°F). Travelers should prepare for about 111 mm (4.4 in) of precipitation spread over 9 days, accompanied by an average humidity level of 67%.

September Temperature in Richmond

In September in Richmond, the average temperature is 22°C (72°F). Maximums can reach 36°C (97°F) and minimums can be as low as 8°C (46°F). It's a great time to visit for those who enjoy mild weather with occasional warm days.

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 22°C (72°F), with highs reaching up to 36°C (97°F) and lows dropping to around 8°C (46°F).
JanFebMarAprMayJunJulAugSepOctNovDec374248566773787671614642
Data source: Temperature data for Richmond 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 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.
JanFebMarAprMayJunJulAugSepOctNovDec941491251331151639410211111182130
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Richmond

In Richmond in September humidity is 67%. With an average temperature of 22°C (72°F), this humidity feels like a warm embrace, creating a tropical ambiance that can be both refreshing and slightly stifling for traveling.

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 67%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec88%88%87%84%84%83%79%66%67%76%89%88%
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 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For 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 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3679101111109753
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 Weather3°C (37°F)94 mm (3.7 inches)88%moderate
February Weather5°C (42°F)149 mm (5.9 inches)88%high
March Weather9°C (49°F)125 mm (4.9 inches)87%high
April Weather13°C (56°F)133 mm (5.3 inches)84%very high
May Weather20°C (67°F)115 mm (4.5 inches)84%very high
June Weather23°C (74°F)163 mm (6.4 inches)83%extreme
July Weather25°C (78°F)93 mm (3.7 inches)79%extreme
August Weather24°C (76°F)102 mm (4.0 inches)66%very high
September Weather22°C (72°F)111 mm (4.4 inches)67%very high
October Weather16°C (61°F)111 mm (4.4 inches)76%high
November Weather8°C (46°F)82 mm (3.2 inches)89%moderate
December Weather5°C (42°F)130 mm (5.1 inches)88%moderate

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