September Weather in Warrenton, United States

Last updated: June 24, 2025

In September, the average temperature in Warrenton, United States hovers around 25°C (77°F). Expect a range from a cool 11°C (53°F) to a warm 36°C (98°F). Throughout the month, anticipate 95 mm (3.7 in) of precipitation spread across 9 days, paired with an average humidity of 82%. Stay prepared for a mix of warm weather and occasional rain!

September Temperature in Warrenton

In September in Warrenton, the average temperature is 25°C (77°F). Maximums can reach 36°C (98°F), while minimums can dip as low as 11°C (53°F). This makes it an ideal time for travelers to enjoy a range of outdoor activities, from soaking up the sun to exploring the pleasant 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 25°C (77°F), with highs reaching up to 36°C (98°F) and lows dropping to around 11°C (53°F).

Data source: Temperature data for Warrenton generated using information from the Copernicus Climate Change Service.

September Precipitation in Warrenton

In Warrenton in September, the precipitation amount is 95 mm (3.7 in) over the course of 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 95 mm (3.7 inches) of precipitation spread over approximately 9 days.

Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

September Humidity in Warrenton

In Warrenton in September, humidity is 82%. With an average temperature of 25°C (77°F), this humidity feels like a warm, oppressive blanket enveloping you as you explore, making every step feel more laborious and prompting the need for frequent hydration breaks.

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 82%, offering insight into how humid the weather typically is during this month.

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.

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.
	Temperature	Precipitation	Humidity	UV
January Weather	9°C (48°F)	98 mm (3.9 inches)	86%	moderate
February Weather	12°C (54°F)	118 mm (4.7 inches)	84%	high
March Weather	14°C (58°F)	83 mm (3.3 inches)	83%	very high
April Weather	18°C (65°F)	103 mm (4.1 inches)	81%	very high
May Weather	23°C (74°F)	102 mm (4.0 inches)	81%	extreme
June Weather	26°C (79°F)	106 mm (4.2 inches)	81%	extreme
July Weather	27°C (82°F)	108 mm (4.2 inches)	83%	extreme
August Weather	27°C (81°F)	130 mm (5.1 inches)	81%	very high
September Weather	25°C (77°F)	95 mm (3.7 inches)	82%	very high
October Weather	20°C (69°F)	105 mm (4.1 inches)	78%	very high
November Weather	13°C (55°F)	83 mm (3.2 inches)	86%	high
December Weather	10°C (51°F)	121 mm (4.7 inches)	89%	moderate