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September Weather in Virginia, United States

Last updated: June 24, 2025

The average temperature in Virginia, United States during September is a pleasant 22°C (71°F), with extremes ranging from a cool 6°C (43°F) to a more sweltering 35°C (95°F). Expect around 68 mm (2.7 in) of precipitation spread over about 6 days, contributing to an average humidity of 76%. Prepare for a month that balances warmth with some refreshing rain!

September Temperature in Virginia

In September in Virginia, the average temperature is 22°C (71°F), with maximums reaching 35°C (95°F) and minimums dropping to as low as 6°C (43°F). This makes it an ideal destination for travelers seeking pleasant weather and a range of outdoor activities.

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

The chart illustrates September temperature patterns in Virginia, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Virginia, September typically has an average temperature of 22°C (71°F), with highs reaching up to 35°C (95°F) and lows dropping to around 6°C (43°F).
JanFebMarAprMayJunJulAugSepOctNovDec283143526575787571574236
Data source: Temperature data for Virginia 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 Virginia

In Virginia in September, the precipitation amount is 68 mm (2.7 in) spread over the course of 6 days.

September Precipitation Trends in Virginia

The chart displays monthly precipitation patterns in Virginia, 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 Virginia, September typically receives around 68 mm (2.7 inches) of precipitation spread over approximately 6 days.
JanFebMarAprMayJunJulAugSepOctNovDec656413211315312810580681016348
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Virginia

In Virginia in September, humidity is 76%. With an average temperature of 22°C (71°F), this humidity feels like traveling through a warm, dense mist that clings to your skin, making every step feel heavier and the air seem thicker, which can be quite draining for outdoor activities.

September Average Humidity in Virginia

This chart illustrates the average monthly humidity levels in Virginia, 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 Virginia is approximately 76%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec82%80%80%80%82%83%81%80%76%76%85%86%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Virginia

In Virginia 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 Virginia.

Maximum UV Index Levels in Virginia for September

The chart shows the monthly maximum UV Index (UVI) for Virginia 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 Virginia typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec357810111198643
Data source: Virginia 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 Virginia Compares to Other Months

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

This table compares monthly weather conditions in Virginia, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-2°C (29°F)65 mm (2.6 inches)82%moderate
February Weather0°C (32°F)64 mm (2.5 inches)80%moderate
March Weather6°C (44°F)131 mm (5.2 inches)80%high
April Weather11°C (53°F)113 mm (4.5 inches)80%very high
May Weather19°C (66°F)153 mm (6.0 inches)82%very high
June Weather24°C (75°F)128 mm (5.0 inches)83%extreme
July Weather25°C (78°F)105 mm (4.1 inches)81%extreme
August Weather24°C (75°F)80 mm (3.2 inches)80%very high
September Weather22°C (71°F)68 mm (2.7 inches)76%very high
October Weather14°C (57°F)101 mm (4.0 inches)76%high
November Weather5°C (42°F)63 mm (2.5 inches)85%moderate
December Weather2°C (36°F)48 mm (1.9 inches)86%moderate

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