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September Weather in Dahlgren, United States

Last updated: June 24, 2025

In September, the average temperature in Dahlgren, United States reaches a pleasant 23°C (73°F). However, temperatures can vary significantly, with a minimum of 8°C (46°F) and a maximum of 34°C (94°F). Expect some moisture in the air, as precipitation averages 69 mm (2.7 in) over approximately 6 days. With an average humidity of 79%, be prepared for a touch of tropical comfort!

September Temperature in Dahlgren

In September in Dahlgren, the average temperature is 23°C (73°F). Maximums can reach 34°C (94°F) and minimums can be as low as 8°C (46°F). This makes it a great time to explore Dahlgren, but be sure to pack for both warm days and cooler nights.

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

The chart illustrates September temperature patterns in Dahlgren, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Dahlgren, September typically has an average temperature of 23°C (73°F), with highs reaching up to 34°C (94°F) and lows dropping to around 8°C (46°F).
JanFebMarAprMayJunJulAugSepOctNovDec343748566877807773604540
Data source: Temperature data for Dahlgren 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 Dahlgren

In Dahlgren in September, the precipitation amount is 69 mm (2.7 in) over a period of 6 days.

September Precipitation Trends in Dahlgren

The chart displays monthly precipitation patterns in Dahlgren, 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 Dahlgren, September typically receives around 69 mm (2.7 inches) of precipitation spread over approximately 6 days.
JanFebMarAprMayJunJulAugSepOctNovDec941071411281561069083691169290
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Dahlgren

In Dahlgren in September humidity is 79%. With an average temperature of 23°C (73°F), this humidity feels like a warm embrace that clings to the skin, making travel feel both invigorating and slightly exhausting as the air wraps around you like a damp blanket.

September Average Humidity in Dahlgren

This chart illustrates the average monthly humidity levels in Dahlgren, 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 Dahlgren is approximately 79%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec84%82%84%83%80%83%82%83%79%79%88%87%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Dahlgren

In Dahlgren 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 Dahlgren.

Maximum UV Index Levels in Dahlgren for September

The chart shows the monthly maximum UV Index (UVI) for Dahlgren 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 Dahlgren typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3579111110109753
Data source: Dahlgren 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 Dahlgren Compares to Other Months

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

This table compares monthly weather conditions in Dahlgren, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather1°C (34°F)94 mm (3.7 inches)84%moderate
February Weather3°C (38°F)107 mm (4.2 inches)82%moderate
March Weather9°C (48°F)141 mm (5.5 inches)84%high
April Weather14°C (57°F)128 mm (5.0 inches)83%very high
May Weather20°C (69°F)156 mm (6.1 inches)80%extreme
June Weather25°C (77°F)106 mm (4.2 inches)83%extreme
July Weather27°C (80°F)90 mm (3.5 inches)82%very high
August Weather25°C (77°F)83 mm (3.3 inches)82%very high
September Weather23°C (73°F)69 mm (2.7 inches)79%very high
October Weather16°C (61°F)116 mm (4.5 inches)79%high
November Weather7°C (45°F)92 mm (3.6 inches)88%moderate
December Weather5°C (41°F)90 mm (3.6 inches)87%moderate

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