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September Weather in Athens, United States

Last updated: June 24, 2025

The average temperature in Athens, United States during September is a warm 26°C (80°F). Daily highs can reach up to 38°C (101°F), while minimums can drop to around 10°C (51°F). Expect about 85 mm (3.4 in) of precipitation spread over 9 days, complemented by an average humidity of 65%.

September Temperature in Athens

In September in Athens, the average temperature is 26°C (80°F). Maximums can reach 38°C (101°F), while minimums can drop to as low as 10°C (51°F). Be prepared for a wide range of temperatures when traveling during this month.

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 26°C (80°F), with highs reaching up to 38°C (101°F) and lows dropping to around 10°C (51°F).
JanFebMarAprMayJunJulAugSepOctNovDec485061657481858580695853
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 85 mm (3.4 in) recorded over a span 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 85 mm (3.4 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec941381221311779279778511169103
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 65%. With an average temperature of 26°C (80°F), this humidity feels like a warm, sticky embrace, making travel less comfortable as you navigate the sights.

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 65%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec80%79%78%78%81%78%73%66%65%72%82%87%
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 reaches 10, which corresponds to a very high Exposure Category. With a time to burn of just 15 minutes, it's crucial to take precautions. 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 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec478101111111110864
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 Weather9°C (49°F)94 mm (3.7 inches)80%moderate
February Weather10°C (51°F)138 mm (5.4 inches)79%high
March Weather16°C (61°F)122 mm (4.8 inches)78%very high
April Weather19°C (66°F)131 mm (5.2 inches)78%very high
May Weather23°C (74°F)177 mm (7.0 inches)81%extreme
June Weather27°C (81°F)92 mm (3.6 inches)78%extreme
July Weather29°C (85°F)79 mm (3.1 inches)73%extreme
August Weather29°C (85°F)77 mm (3.0 inches)66%extreme
September Weather26°C (80°F)85 mm (3.4 inches)65%very high
October Weather21°C (69°F)111 mm (4.4 inches)72%very high
November Weather14°C (58°F)69 mm (2.7 inches)82%high
December Weather12°C (53°F)103 mm (4.1 inches)87%moderate

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