September Weather in Avon, United States

Last updated: June 24, 2025

In September, the average temperature in Avon, United States is a pleasant 21°C (70°F). However, temperatures can vary significantly, with a minimum of 6°C (43°F) and a maximum reaching 34°C (94°F). Visitors should also be prepared for some rain, as the region experiences approximately 94 mm (3.7 in) of precipitation over about 8 days. With an average humidity of 78%, the air can feel quite tropical.

September Temperature in Avon

In September in Avon, the average temperature is 21°C (70°F), with maximums reaching 34°C (94°F) and minimums dropping as low as 6°C (43°F). This varied climate makes it an ideal destination for travelers looking to experience a mix of warm days and cooler evenings.

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

The chart illustrates September temperature patterns in Avon, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Avon, September typically has an average temperature of 21°C (70°F), with highs reaching up to 34°C (94°F) and lows dropping to around 6°C (43°F).

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

September Precipitation in Avon

In Avon in September, the precipitation amount is 94 mm (3.7 in) over the course of 8 days.

September Precipitation Trends in Avon

The chart displays monthly precipitation patterns in Avon, 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 Avon, September typically receives around 94 mm (3.7 inches) of precipitation spread over approximately 8 days.

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

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

September Humidity in Avon

In Avon in September, humidity is 78%. With an average temperature of 21°C (70°F), this humidity feels like a warm, enveloping blanket that can leave travelers feeling sticky and slightly fatigued, making it important to stay hydrated and take frequent breaks from outdoor activities.

September Average Humidity in Avon

This chart illustrates the average monthly humidity levels in Avon, 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 Avon is approximately 78%, 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 Avon

In Avon 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 Avon.

Maximum UV Index Levels in Avon for September

The chart shows the monthly maximum UV Index (UVI) for Avon 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 Avon typically reaches 8, which falls under the very high exposure category.

Data source: Avon 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 Avon Compares to Other Months

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

This table compares monthly weather conditions in Avon, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-3°C (26°F)	58 mm (2.3 inches)	81%	moderate
February Weather	-2°C (29°F)	65 mm (2.6 inches)	81%	moderate
March Weather	5°C (42°F)	112 mm (4.4 inches)	81%	high
April Weather	10°C (51°F)	107 mm (4.2 inches)	82%	very high
May Weather	18°C (64°F)	165 mm (6.5 inches)	78%	very high
June Weather	23°C (74°F)	149 mm (5.9 inches)	81%	extreme
July Weather	25°C (77°F)	105 mm (4.1 inches)	79%	very high
August Weather	23°C (74°F)	78 mm (3.1 inches)	77%	very high
September Weather	21°C (70°F)	94 mm (3.7 inches)	78%	very high
October Weather	13°C (55°F)	120 mm (4.7 inches)	78%	high
November Weather	4°C (40°F)	52 mm (2.1 inches)	87%	moderate
December Weather	1°C (34°F)	50 mm (2.0 inches)	84%	low