With the month of September the weather starts to cool down a little bit. But the temperatures are still quite high and nowhere near autumn season in other European countries.
The average temperature is 24°C (75°F) but the average low drops to 19°C (66°F) and the average high is 28°C (82°F).
The average sunshine in September is around 7 hours. Luckily rain is very rare in September, and because of the warm sea, still around 24°C (75°F) swimming is still a popular activity this month.
Humidity is a little higher, around 60%, but this is unnoticeable for most visitors.
This month the temperatures get lower, especially at night. The average temperatures are
19°C (66°F), the average low is 15°C (59°F) and the average high 23°C (73°F).
The beginning of October is almost like September, but towards the end of the month the weather is much cooler..The days are also shorter, with around 5 sunshine hours per day,
And rain is not that uncommon in Athens in October, so there is a chance that you will encounter a rainy day when you visit Athens in October.
If you are interested in reading about the weather in the summer season click here!
for the winter season here, and for the spring season here!