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September Weather in Athens, United States

Last updated: June 24, 2025

In September, the average temperature in Athens, United States hovers around 16°C (61°F). During this month, temperatures can range from a chilly 0°C (32°F) to a warm 32°C (90°F). Expect approximately 88 mm (3.5 in) of precipitation over 11 days, with an average humidity level of 80%.

September Temperature in Athens

In September in Athens, the average temperature is 16°C (61°F). The maximum can reach 32°C (90°F) and the minimum can be as low as 0°C (32°F). Be prepared for a diverse range of weather conditions while traveling, as it can vary significantly from warm days to chilly nights.

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 16°C (61°F), with highs reaching up to 32°C (90°F) and lows dropping to around 0°C (32°F).
JanFebMarAprMayJunJulAugSepOctNovDec161731415667716761463223
Data source: Temperature data for Athens generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

September Precipitation in Athens

In Athens in September, the total precipitation amount is 88 mm (3.5 in) spread over 11 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 88 mm (3.5 inches) of precipitation spread over approximately 11 days.
JanFebMarAprMayJunJulAugSepOctNovDec34515399114105126131881145053
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Athens

In Athens in September, humidity is 80%. With an average temperature of 16°C (61°F), this humidity feels like a warm blanket wrapped around you, making sightseeing a sweat-inducing challenge but also lending a lush vibrancy to the surroundings that can enhance your travel experience.

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 80%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec88%89%86%85%79%80%80%78%80%84%89%85%
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.
JanFebMarAprMayJunJulAugSepOctNovDec2457810997532
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.
 TemperaturePrecipitationHumidityUV
January Weather-9°C (17°F)34 mm (1.3 inches)88%low
February Weather-9°C (17°F)51 mm (2.0 inches)89%moderate
March Weather-1°C (31°F)53 mm (2.1 inches)86%moderate
April Weather5°C (42°F)99 mm (3.9 inches)85%high
May Weather14°C (57°F)114 mm (4.5 inches)79%very high
June Weather19°C (67°F)105 mm (4.1 inches)80%very high
July Weather22°C (71°F)126 mm (5.0 inches)80%very high
August Weather19°C (67°F)131 mm (5.1 inches)78%very high
September Weather16°C (61°F)88 mm (3.5 inches)80%high
October Weather8°C (47°F)114 mm (4.5 inches)84%moderate
November Weather0°C (32°F)50 mm (2.0 inches)89%moderate
December Weather-5°C (23°F)52 mm (2.1 inches)85%low

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