September Weather in Athens, United States

Last updated: June 24, 2025

In September, the average temperature in Athens, United States hovers around 24°C (76°F), making it a pleasant time to visit. Expect a minimum of 12°C (54°F) and a maximum of 35°C (95°F) during your stay. However, don't forget your umbrella—107 mm (4.2 in) of precipitation is typically spread over 8 days. With an average humidity of 64%, the air will feel comfortably warm, providing a perfect backdrop for your adventures!

September Temperature in Athens

In September in Athens, the average temperature is 24°C (76°F), with maximums reaching 35°C (95°F) and minimums dropping as low as 12°C (54°F). This mild climate makes Athens an ideal destination for travelers looking to enjoy outdoor activities while experiencing comfortable weather.

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 24°C (76°F), with highs reaching up to 35°C (95°F) and lows dropping to around 12°C (54°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 total precipitation amount is 107 mm (4.2 in), occurring over a span of 8 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 107 mm (4.2 inches) of precipitation spread over approximately 8 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 64%. With an average temperature of 24°C (76°F), this humidity feels like a warm, sticky embrace, making travel slightly uncomfortable but still enjoyable, as you may find yourself yearning for a refreshing breeze or a quick dip in the water.

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 64%, 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 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For 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 9, which falls under the very 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	7°C (44°F)	113 mm (4.5 inches)	87%	moderate
February Weather	9°C (49°F)	177 mm (7.0 inches)	87%	high
March Weather	13°C (56°F)	183 mm (7.2 inches)	85%	very high
April Weather	17°C (62°F)	144 mm (5.7 inches)	82%	very high
May Weather	22°C (72°F)	102 mm (4.0 inches)	83%	extreme
June Weather	25°C (78°F)	132 mm (5.2 inches)	82%	extreme
July Weather	27°C (81°F)	106 mm (4.2 inches)	78%	extreme
August Weather	27°C (80°F)	115 mm (4.5 inches)	67%	very high
September Weather	24°C (76°F)	107 mm (4.2 inches)	64%	very high
October Weather	19°C (66°F)	112 mm (4.4 inches)	74%	high
November Weather	11°C (52°F)	75 mm (3.0 inches)	87%	moderate
December Weather	9°C (48°F)	147 mm (5.8 inches)	88%	moderate