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September Weather in Richmond, United States

Last updated: June 24, 2025

In September, the average temperature in Richmond, United States hovers around 19°C (67°F), with a comfortable range from a chilly 3°C (38°F) to a warm 33°C (92°F). Be prepared for occasional rain, as the region receives about 91 mm (3.6 in) of precipitation over 10 days. Humidity levels linger around 79%, adding to the overall climate experience.

September Temperature in Richmond

In September in Richmond, the average temperature is 19°C (67°F). Maximum temperatures can reach 33°C (92°F), while minimums can dip as low as 3°C (38°F). It's a good idea to pack layers and be prepared for both warm days and chilly nights while traveling.

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 19°C (67°F), with highs reaching up to 33°C (92°F) and lows dropping to around 3°C (38°F).
JanFebMarAprMayJunJulAugSepOctNovDec242637465970757266533832
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 totals 91 mm (3.6 in) over a span of 10 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 91 mm (3.6 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec6157651121561088284921184853
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 79%. With an average temperature of 19°C (67°F), this humidity feels like a warm, enveloping blanket that makes traveling a bit more challenging, as the air is thick and can leave you feeling sluggish during outdoor adventures.

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 79%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec85%85%85%85%78%80%78%76%79%83%88%82%
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.
JanFebMarAprMayJunJulAugSepOctNovDec34689101098532
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-5°C (24°F)61 mm (2.4 inches)85%moderate
February Weather-3°C (26°F)57 mm (2.2 inches)85%moderate
March Weather3°C (37°F)65 mm (2.6 inches)85%high
April Weather8°C (47°F)112 mm (4.4 inches)85%very high
May Weather15°C (59°F)156 mm (6.1 inches)78%very high
June Weather21°C (70°F)108 mm (4.2 inches)80%very high
July Weather24°C (75°F)82 mm (3.2 inches)78%very high
August Weather22°C (72°F)84 mm (3.3 inches)76%very high
September Weather19°C (67°F)91 mm (3.6 inches)79%very high
October Weather12°C (53°F)118 mm (4.6 inches)83%moderate
November Weather3°C (38°F)48 mm (1.9 inches)88%moderate
December Weather0°C (32°F)53 mm (2.1 inches)81%low

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