September Weather in Palermo, United States

Last updated: June 24, 2025

In Palermo, United States, the average temperature in September is a comfortable 17°C (62°F). Expect a minimum chill of 1°C (35°F) and a warm maximum of 31°C (88°F). Be prepared for some rain, as 73 mm (2.9 in) of precipitation can occur over 7 days. Plus, you'll likely feel the average humidity at 77%, making it a month full of diverse weather experiences!

September Temperature in Palermo

In September in Palermo, the average temperature is 17°C (62°F), with maximums reaching up to 31°C (88°F) and minimums dropping as low as 1°C (35°F). It's a great time to explore Palermo while enjoying mild weather and the potential for warm days.

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

The chart illustrates September temperature patterns in Palermo, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Palermo, September typically has an average temperature of 17°C (62°F), with highs reaching up to 31°C (88°F) and lows dropping to around 1°C (35°F).

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

September Precipitation in Palermo

In Palermo in September, the precipitation amount is 73 mm (2.9 in) during a span of 7 days.

September Precipitation Trends in Palermo

The chart displays monthly precipitation patterns in Palermo, 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 Palermo, September typically receives around 73 mm (2.9 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 Palermo

In Palermo in September humidity is 77%. With an average temperature of 17°C (62°F), this humidity feels like a warm embrace, creating a lush, almost tropical atmosphere that can be quite stifling for traveling, making it essential to stay hydrated and take frequent breaks in the shade.

September Average Humidity in Palermo

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

In Palermo 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 Palermo.

Maximum UV Index Levels in Palermo for September

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

Data source: Palermo 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 Palermo Compares to Other Months

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

This table compares monthly weather conditions in Palermo, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-5°C (23°F)	84 mm (3.3 inches)	88%	low
February Weather	-4°C (24°F)	83 mm (3.3 inches)	88%	moderate
March Weather	-1°C (31°F)	72 mm (2.8 inches)	85%	moderate
April Weather	6°C (43°F)	121 mm (4.7 inches)	81%	high
May Weather	12°C (55°F)	85 mm (3.4 inches)	76%	very high
June Weather	18°C (65°F)	70 mm (2.8 inches)	74%	very high
July Weather	21°C (70°F)	113 mm (4.4 inches)	74%	very high
August Weather	21°C (70°F)	79 mm (3.1 inches)	74%	very high
September Weather	17°C (62°F)	73 mm (2.9 inches)	77%	high
October Weather	10°C (51°F)	126 mm (5.0 inches)	82%	moderate
November Weather	3°C (37°F)	110 mm (4.3 inches)	85%	moderate
December Weather	-3°C (27°F)	113 mm (4.5 inches)	84%	low