From mid-March through May the weather is almost always pleasant in Athens, although Greeks rightly say that the March wind has "teeth." Between June and August, the temperature usually rises steadily, making August a good month to emulate the Athenian practice of avoiding the city. If you do come here in August, you'll find that Athens, like Paris, belongs to the tourists: Some 60% of all Athenians take their summer holiday between the 1st and 15th of August. Stretches when it's well over 100°F (38°C) are not uncommon in August, when anyone with health problems such as asthma should be wary of Athens's nefos (smog). Because the city can be hot and exhausting, give yourself time off for a coffee or a cold drink in a cafe. After all, you're on vacation!
September is usually balmy, with occasional light rain, although it's not unknown for August heat to spill over well into September. October usually offers beautiful summer/autumn weather, although with rain and some wind likely. It might even be intermittently chilly.
Most rain falls between November and February, when Athens can be colder and windier than you might expect. Average daytime temperatures range from 52°F (11°C) in January to 92°F (33°C) in August.
Note: This information was accurate when it was published, but can change without notice. Please be sure to confirm all rates and details directly with the companies in question before planning your trip.