Athens
Greece
Long-term weather forecast
Long-term weather forecast
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September weather forecast and Climate
Athens, Greece

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The ancient city of Athens in Greece with a view of the Parthenon Temple at dusk
The ancient city of Athens in Greece with a view of the Parthenon Temple at dusk
As autumn comes, some of the summer heat starts to fade slightly. Average temperatures are still at a pleasant 24°C (75.2°F). The amount of sunshine a day also starts to drop, with around 7 hours of sun, but there is still a low chance of rain.
Going to the beach is still an attractive activity as of the sea remains heated.
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  • The average high temperature in September: 28.7°C

The warmest month (with the highest average high temperature) is August (33.7°C).
The month with the lowest average high temperature is January (13.3°C).

  • The average low temperature in September: 19.8°C

The month with the highest average low temperature is August (23.8°C).
Coldest months (with the lowest average low temperature) are January and February (6.8°C).

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  • The average humidity in September: 57.2%

The month with the highest relative humidity is November (71.9%).
The month with the lowest relative humidity is August (47.6%).

  • The average rainfall in September: 13.9mm

The wettest month (with the highest rainfall) is December (69.1mm).
The driest month (with the lowest rainfall) is July (5.8mm).

  • The average rainfall days in September: 3.3 days

The month with the highest number of rainy days is January (12.6 days).
The month with the lowest number of rainy days is August (1.7 days).

  • The average sea temperature in September: 25°C

The best month for swimming (with the highest average sea temperature) is August (26.3°C).
The coldest month (with the lowest average sea temperature) is February (15°C).

  • The average daylight in September: 12h

The month with the longest days is June (Average daylight: 15h).
Months with shortest days are January, November and December (Average daylight: 10h).

  • The average sunshine in September: 8.4h

The month with most sunshine is July (Average sunshine: 12.4h).
The month with least sunshine is December (Average sunshine: 3.4h).

  • The average UV index in September: 7

The month with the highest UV index is July (UV index 10).
Months with the lowest UV index are January and December (UV index 2).

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