Athens
Greece
Long-term weather forecast
Long-term weather forecast
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May 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
Spring is really in full swing in May, so unsurprisingly with the rising temperatures comes more visitors from overseas. May is the first month to show signs of the summer heat, with a high temperature of a very pleasant 24°C (75.2°F).
There is virtually no chance of rain in May, with 10 hours of average daily sunshine. The sea temperature continues to rise, yet still feels relatively cool at 19°C (66.2°F). Humidity levels at this time of year are at their lowest.
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  • The average high temperature in May: 25.2°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 May: 15.8°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 May: 59.5%

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 May: 22.7mm

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 May: 6.2 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 May: 18.5°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 May: 14h

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 May: 9.8h

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 May: 8

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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