September Weather in Athens, United States

Last updated: June 24, 2025

In September, the average temperature in Athens, United States is a pleasant 19°C (66°F). Visitors can expect a range from a crisp 2°C (36°F) to a warm 33°C (91°F). Precipitation is moderate, with approximately 95 mm (3.7 in) spread over 9 days of the month, while the air maintains an average humidity level of 72%. This climate offers a refreshing experience perfect for exploring the beauty of the area!

September Temperature in Athens

In September in Athens, the average temperature is 19°C (66°F), with maximums reaching up to 33°C (91°F) and minimums dipping as low as 2°C (36°F). This makes it a great time for travelers to enjoy a mix of warm days and cool nights, perfect for exploring the local sights.

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

The chart illustrates September temperature patterns in Athens, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Athens, September typically has an average temperature of 19°C (66°F), with highs reaching up to 33°C (91°F) and lows dropping to around 2°C (36°F).

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

September Precipitation in Athens

In Athens in September, the precipitation amount is 95 mm (3.7 in) over the course of 9 days.

September Precipitation Trends in Athens

The chart displays monthly precipitation patterns in Athens, 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 Athens, September typically receives around 95 mm (3.7 inches) of precipitation spread over approximately 9 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 Athens

In Athens in September, humidity is 72%. With an average temperature of 19°C (66°F), this humidity feels like a warm embrace that can make even the lightest activities feel strenuous for traveling.

September Average Humidity in Athens

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

In Athens 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 Athens.

Maximum UV Index Levels in Athens for September

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

Data source: Athens 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 Athens Compares to Other Months

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

This table compares monthly weather conditions in Athens, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-2°C (29°F)	67 mm (2.6 inches)	89%	moderate
February Weather	0°C (31°F)	83 mm (3.3 inches)	88%	moderate
March Weather	3°C (37°F)	76 mm (3.0 inches)	86%	high
April Weather	9°C (49°F)	122 mm (4.8 inches)	84%	very high
May Weather	15°C (60°F)	103 mm (4.0 inches)	76%	very high
June Weather	20°C (69°F)	77 mm (3.0 inches)	72%	very high
July Weather	23°C (75°F)	116 mm (4.6 inches)	66%	very high
August Weather	23°C (73°F)	96 mm (3.8 inches)	64%	very high
September Weather	19°C (66°F)	95 mm (3.7 inches)	72%	high
October Weather	13°C (55°F)	131 mm (5.2 inches)	81%	high
November Weather	5°C (41°F)	90 mm (3.6 inches)	87%	moderate
December Weather	1°C (33°F)	91 mm (3.6 inches)	84%	low