September Weather in Vail, United States

Last updated: June 24, 2025

In September, the average temperature in Vail, United States is a warm 26°C (79°F), making it an inviting destination. However, expect a range in temperatures, with lows of 11°C (53°F) and highs reaching 39°C (102°F). During this period, precipitation averages 32 mm (1.3 in) spread across 4 days, while the average humidity sits at a comfortable 72%. Whether you enjoy sunny days or the occasional shower, there's something for everyone!

September Temperature in Vail

In September in Vail, the average temperature is 26°C (79°F), with maximums reaching up to 39°C (102°F) and minimums dropping as low as 11°C (53°F). This warm climate makes it a perfect destination for travelers seeking a mix of sunny days and cooler evenings.

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

The chart illustrates September temperature patterns in Vail, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Vail, September typically has an average temperature of 26°C (79°F), with highs reaching up to 39°C (102°F) and lows dropping to around 11°C (53°F).

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

September Precipitation in Vail

In Vail in September, the total precipitation amount is 32 mm (1.3 in), accumulated over a period of 4 days.

September Precipitation Trends in Vail

The chart displays monthly precipitation patterns in Vail, 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 Vail, September typically receives around 32 mm (1.3 inches) of precipitation spread over approximately 4 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 Vail

In Vail in September, humidity is 72%. With an average temperature of 26°C (79°F), this humidity feels like a warm blanket wrapping around you, making outdoor activities feel a bit more strenuous but also adding a tropical charm to your travels.

September Average Humidity in Vail

This chart illustrates the average monthly humidity levels in Vail, 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 Vail 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 Vail

In Vail in September, the maximum UV index reaches 11, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's essential to take precautions. For more details, you can check the Hourly UV Index in Vail.

Maximum UV Index Levels in Vail for September

The chart shows the monthly maximum UV Index (UVI) for Vail 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 Vail typically reaches 11, which falls under the extreme exposure category.

Data source: Vail 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 Vail Compares to Other Months

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

This table compares monthly weather conditions in Vail, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	10°C (50°F)	24 mm (0.9 inches)	74%	moderate
February Weather	11°C (52°F)	36 mm (1.4 inches)	71%	high
March Weather	15°C (59°F)	17 mm (0.7 inches)	60%	very high
April Weather	20°C (68°F)	4 mm (0.1 inches)	43%	extreme
May Weather	23°C (75°F)	4 mm (0.1 inches)	32%	extreme
June Weather	29°C (85°F)	9 mm (0.3 inches)	28%	extreme
July Weather	29°C (84°F)	66 mm (2.6 inches)	38%	extreme
August Weather	28°C (83°F)	57 mm (2.3 inches)	60%	extreme
September Weather	26°C (79°F)	32 mm (1.3 inches)	72%	extreme
October Weather	21°C (70°F)	13 mm (0.5 inches)	66%	very high
November Weather	16°C (61°F)	16 mm (0.6 inches)	74%	high
December Weather	11°C (51°F)	29 mm (1.1 inches)	81%	moderate