September Weather in Roanoke, United States

Last updated: June 24, 2025

In September, the average temperature in Roanoke, United States is a warm 26°C (80°F). Expect a range with minimums dipping to 13°C (56°F) and maximums soaring to 36°C (96°F). With 145 mm (5.7 in) of precipitation spread over 13 days, you'll want to come prepared for some rain. Additionally, the air carries an average humidity of 72%, adding to the tropical feel of the season.

September Temperature in Roanoke

In September in Roanoke, the average temperature is 26°C (80°F), with maximums reaching 36°C (96°F) and minimums dropping to 13°C (56°F). This makes it an ideal time for travelers seeking warm weather and a variety of outdoor activities.

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

The chart illustrates September temperature patterns in Roanoke, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Roanoke, September typically has an average temperature of 26°C (80°F), with highs reaching up to 36°C (96°F) and lows dropping to around 13°C (56°F).

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

September Precipitation in Roanoke

In Roanoke in September, the precipitation amount is 145 mm (5.7 in) over the course of 13 days.

September Precipitation Trends in Roanoke

The chart displays monthly precipitation patterns in Roanoke, 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 Roanoke, September typically receives around 145 mm (5.7 inches) of precipitation spread over approximately 13 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 Roanoke

In Roanoke in September, humidity is 72%. With an average temperature of 26°C (80°F), this humidity feels like a warm embrace, making traveling feel a bit heavier, yet invigorating as you navigate the vibrant atmosphere, surrounded by the rich scents and lively sounds of the locale.

September Average Humidity in Roanoke

This chart illustrates the average monthly humidity levels in Roanoke, 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 Roanoke is approximately 72%, 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 Roanoke

In Roanoke in September, the maximum UV index reaches 10, which corresponds to a very high Exposure Category. With a time to burn of just 15 minutes, it's crucial to take precautions. For more detailed information, you can check the Hourly UV Index in Roanoke.

Maximum UV Index Levels in Roanoke for September

The chart shows the monthly maximum UV Index (UVI) for Roanoke 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 Roanoke typically reaches 10, which falls under the very high exposure category.

Data source: Roanoke 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 Roanoke Compares to Other Months

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

This table compares monthly weather conditions in Roanoke, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	12°C (54°F)	115 mm (4.5 inches)	81%	moderate
February Weather	15°C (58°F)	104 mm (4.1 inches)	81%	very high
March Weather	18°C (65°F)	62 mm (2.4 inches)	79%	very high
April Weather	20°C (69°F)	152 mm (6.0 inches)	80%	very high
May Weather	25°C (77°F)	181 mm (7.1 inches)	81%	extreme
June Weather	27°C (81°F)	157 mm (6.2 inches)	76%	extreme
July Weather	28°C (83°F)	162 mm (6.4 inches)	73%	extreme
August Weather	28°C (83°F)	181 mm (7.1 inches)	71%	extreme
September Weather	26°C (80°F)	145 mm (5.7 inches)	72%	very high
October Weather	22°C (72°F)	123 mm (4.8 inches)	73%	very high
November Weather	16°C (60°F)	79 mm (3.1 inches)	83%	high
December Weather	14°C (57°F)	115 mm (4.5 inches)	88%	moderate