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September Weather in Richmond, United States

Last updated: June 24, 2025

In Richmond, United States, the average temperature in September is a warm 26°C (80°F). Expect to experience temperatures ranging from a cool 12°C (53°F) to a sizzling 38°C (101°F). During this month, anticipate 75 mm (3.0 in) of precipitation spread across 9 days, while the average humidity hovers around 73%. Stay prepared for a blend of warmth and occasional rain!

September Temperature in Richmond

In September in Richmond, the average temperature is 26°C (80°F), with maximums reaching 38°C (101°F) and minimums dropping as low as 12°C (53°F). It's advisable to pack for warm days and cooler evenings while planning your trip.

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 26°C (80°F), with highs reaching up to 38°C (101°F) and lows dropping to around 12°C (53°F).
JanFebMarAprMayJunJulAugSepOctNovDec485361657480838279695552
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 75 mm (3.0 in) distributed over 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 75 mm (3.0 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec122194136171123102101957513186127
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 73%. With an average temperature of 26°C (80°F), this humidity feels like a warm embrace that clings to your skin, making outdoor exploration a bit sticky but still inviting, perfect for leisurely strolls in the shade or refreshing breaks by the water.

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.
JanFebMarAprMayJunJulAugSepOctNovDec84%83%80%82%83%80%80%75%73%76%84%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 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.
JanFebMarAprMayJunJulAugSepOctNovDec478111112121110864
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 Weather9°C (49°F)122 mm (4.8 inches)84%moderate
February Weather12°C (53°F)194 mm (7.6 inches)83%high
March Weather16°C (62°F)136 mm (5.4 inches)80%very high
April Weather18°C (65°F)171 mm (6.7 inches)82%extreme
May Weather24°C (75°F)123 mm (4.8 inches)83%extreme
June Weather27°C (80°F)102 mm (4.0 inches)80%extreme
July Weather28°C (83°F)100 mm (4.0 inches)80%extreme
August Weather28°C (83°F)95 mm (3.7 inches)75%extreme
September Weather26°C (80°F)75 mm (3.0 inches)73%very high
October Weather21°C (69°F)131 mm (5.2 inches)76%very high
November Weather13°C (56°F)86 mm (3.4 inches)84%high
December Weather11°C (53°F)127 mm (5.0 inches)88%moderate

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