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September Weather in Warrenton, United States

Last updated: June 24, 2025

In September, the average temperature in Warrenton, United States hovers around 23°C (74°F), offering a pleasant climate for outdoor activities. However, temperatures can swing from a chilly 8°C (47°F) to a scorching 35°C (96°F). Be prepared for some rain, as the region sees about 109 mm (4.3 in) of precipitation over 9 days, contributing to a high average humidity of 75%. Whether you’re sunbathing or seeking cool shelter, Warrenton has something for everyone!

September Temperature in Warrenton

In September in Warrenton, the average temperature is 23°C (74°F). The maximum can reach 35°C (96°F), and the minimum can drop as low as 8°C (47°F). This variety in temperatures makes Warrenton a suitable destination for travelers seeking both warm days and cooler evenings.

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

The chart illustrates September temperature patterns in Warrenton, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Warrenton, September typically has an average temperature of 23°C (74°F), with highs reaching up to 35°C (96°F) and lows dropping to around 8°C (47°F).
JanFebMarAprMayJunJulAugSepOctNovDec424751616975807873645045
Data source: Temperature data for Warrenton 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 Warrenton

In Warrenton in September, the total precipitation amount is 109 mm (4.3 in) spread over 9 days.

September Precipitation Trends in Warrenton

The chart displays monthly precipitation patterns in Warrenton, 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 Warrenton, September typically receives around 109 mm (4.3 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec86110881071201231101411099878100
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Warrenton

In Warrenton in September, humidity is 75%. With an average temperature of 23°C (74°F), this humidity feels like a warm, heavy blanket wrapping around you, making it feel more sweltering than it actually is, which can be quite uncomfortable for traveling.

September Average Humidity in Warrenton

This chart illustrates the average monthly humidity levels in Warrenton, 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 Warrenton is approximately 75%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec84%84%84%82%83%83%79%77%75%81%87%85%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Warrenton

In Warrenton 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 Warrenton.

Maximum UV Index Levels in Warrenton for September

The chart shows the monthly maximum UV Index (UVI) for Warrenton 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 Warrenton typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec36710111111109853
Data source: Warrenton 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 Warrenton Compares to Other Months

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

This table compares monthly weather conditions in Warrenton, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather5°C (42°F)86 mm (3.4 inches)84%moderate
February Weather8°C (47°F)109 mm (4.3 inches)84%high
March Weather11°C (52°F)88 mm (3.5 inches)84%high
April Weather16°C (61°F)107 mm (4.2 inches)82%very high
May Weather21°C (70°F)120 mm (4.7 inches)82%extreme
June Weather24°C (76°F)123 mm (4.8 inches)83%extreme
July Weather27°C (80°F)110 mm (4.3 inches)79%extreme
August Weather26°C (78°F)141 mm (5.5 inches)77%very high
September Weather23°C (74°F)109 mm (4.3 inches)75%very high
October Weather18°C (65°F)98 mm (3.8 inches)81%very high
November Weather10°C (51°F)78 mm (3.1 inches)87%moderate
December Weather7°C (46°F)100 mm (3.9 inches)85%moderate

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