September Weather in Etna, United States

Last updated: June 24, 2025

In Etna, United States, the average temperature in September hovers around 16°C (62°F). Expect varying conditions, with minimum temperatures dipping to 0°C (33°F) and peaks reaching a warm 32°C (89°F). During this month, you can anticipate 72 mm (2.8 in) of precipitation spread over 7 days, contributing to an average humidity of 77%. Prepare accordingly for a mix of weather!

September Temperature in Etna

In September in Etna, the average temperature is 16°C (62°F), with maximums reaching up to 32°C (89°F) and minimums dropping as low as 0°C (33°F). This varied climate makes it essential for travelers to pack for both warm and cold conditions.

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

The chart illustrates September temperature patterns in Etna, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Etna, September typically has an average temperature of 16°C (62°F), with highs reaching up to 32°C (89°F) and lows dropping to around 0°C (33°F).

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

September Precipitation in Etna

In Etna in September, the total precipitation amount is 72 mm (2.8 in) over the course of 7 days.

September Precipitation Trends in Etna

The chart displays monthly precipitation patterns in Etna, 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 Etna, September typically receives around 72 mm (2.8 inches) of precipitation spread over approximately 7 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 Etna

In Etna in September, humidity is 77%. With an average temperature of 16°C (62°F), this humidity feels like a warm, enveloping blanket that can make outdoor activities feel heavy and draining, so travelers may want to plan for breaks in shaded areas and stay hydrated.

September Average Humidity in Etna

This chart illustrates the average monthly humidity levels in Etna, 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 Etna is approximately 77%, 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 Etna

In Etna in September, the maximum UV index is 7, which corresponds to the high Exposure Category. This means that the time to burn is approximately 25 minutes. For more detailed information, you can check the Hourly UV Index in Etna.

Maximum UV Index Levels in Etna for September

The chart shows the monthly maximum UV Index (UVI) for Etna 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 Etna typically reaches 7, which falls under the high exposure category.

Data source: Etna 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 Etna Compares to Other Months

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

This table compares monthly weather conditions in Etna, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-6°C (22°F)	87 mm (3.4 inches)	88%	low
February Weather	-5°C (24°F)	80 mm (3.2 inches)	88%	moderate
March Weather	-1°C (31°F)	69 mm (2.7 inches)	85%	moderate
April Weather	6°C (43°F)	120 mm (4.7 inches)	81%	high
May Weather	12°C (54°F)	90 mm (3.6 inches)	76%	very high
June Weather	18°C (64°F)	77 mm (3.0 inches)	74%	very high
July Weather	21°C (70°F)	100 mm (3.9 inches)	74%	very high
August Weather	20°C (69°F)	77 mm (3.0 inches)	74%	very high
September Weather	16°C (62°F)	72 mm (2.8 inches)	77%	high
October Weather	10°C (50°F)	119 mm (4.7 inches)	82%	moderate
November Weather	3°C (37°F)	114 mm (4.5 inches)	85%	moderate
December Weather	-3°C (26°F)	113 mm (4.5 inches)	84%	low