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September Weather in Stephens City, United States

Last updated: June 24, 2025

In Stephens City, United States, the average temperature in September reaches a pleasant 21°C (69°F). However, be prepared for a temperature range as low as 3°C (38°F) and as high as 35°C (95°F). Expect around 112 mm (4.4 in) of precipitation over 10 days, accompanied by an average humidity of 68%.

September Temperature in Stephens City

In September in Stephens City, the average temperature is 21°C (69°F). The maximum can reach 35°C (95°F), and the minimum can be as low as 3°C (38°F). Be prepared for a wide range of temperatures when traveling to Stephens City this month!

September Weather in Stephens City: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Stephens City, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Stephens City, September typically has an average temperature of 21°C (69°F), with highs reaching up to 35°C (95°F) and lows dropping to around 3°C (38°F).
JanFebMarAprMayJunJulAugSepOctNovDec343945556472787569594539
Data source: Temperature data for Stephens City 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 Stephens City

In Stephens City in September, the total precipitation amount is 112 mm (4.4 in) over the course of 10 days.

September Precipitation Trends in Stephens City

The chart displays monthly precipitation patterns in Stephens City, 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 Stephens City, September typically receives around 112 mm (4.4 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec6091791021311131011121121027987
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Stephens City

In Stephens City in September humidity is 68%. With average temperature 21°C (69°F), this humidity feels like a warm embrace, making it essential for travelers to stay hydrated and take breaks in the shade while exploring the local sights.

September Average Humidity in Stephens City

This chart illustrates the average monthly humidity levels in Stephens City, 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 Stephens City is approximately 68%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec86%86%86%84%78%79%70%59%68%80%87%85%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Stephens City

In Stephens City 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 Stephens City.

Maximum UV Index Levels in Stephens City for September

The chart shows the monthly maximum UV Index (UVI) for Stephens City 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 Stephens City typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec35710101010108753
Data source: Stephens City 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 Stephens City Compares to Other Months

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

This table compares monthly weather conditions in Stephens City, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather1°C (35°F)60 mm (2.3 inches)86%moderate
February Weather4°C (39°F)91 mm (3.6 inches)86%moderate
March Weather7°C (45°F)79 mm (3.1 inches)86%high
April Weather13°C (55°F)102 mm (4.0 inches)84%very high
May Weather18°C (64°F)131 mm (5.2 inches)78%very high
June Weather22°C (73°F)113 mm (4.5 inches)79%very high
July Weather26°C (78°F)100 mm (4.0 inches)70%very high
August Weather24°C (75°F)112 mm (4.4 inches)59%very high
September Weather21°C (69°F)112 mm (4.4 inches)68%very high
October Weather15°C (60°F)102 mm (4.0 inches)80%high
November Weather7°C (45°F)79 mm (3.1 inches)86%moderate
December Weather4°C (39°F)87 mm (3.4 inches)85%moderate

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