Kos weather in September 2025

The weather in Kos in September is very hot. The average temperatures are between 23°C and 25°C, drinking water regularly is advisable.

You can expect a few rainy days in Kos during September, but usually the weather is comfortable in September.

Our weather forecast can give you a great sense of what weather to expect in Kos in September 2025.

If you’re planning to visit Kos in the near future, we highly recommend that you review the 14 day weather forecast for Kos before you arrive.

Temperatures

25° / 23°

Rainy Days

Snowy Days

Dry Days

Rainfall

Sun Hours

11.9

Hrs

Explore the weather in Kos in other months

Month	Temperatures	Rainy Days	Dry Days	Rainfall	Weather	More details
January	14° / 12°	8	23	195 mm	Ok	Kos in January
February	15° / 13°	6	22	129 mm	Good	Kos in February
March	15° / 13°	4	27	89 mm	Good	Kos in March
April	18° / 16°	2	28	48 mm	Good	Kos in April
May	21° / 19°	2	29	36 mm	Good	Kos in May
June	24° / 22°	1	29	20 mm	Perfect	Kos in June
July	26° / 24°	0	31	3 mm	Perfect	Kos in July
August	27° / 25°	0	31	2 mm	Perfect	Kos in August
September	25° / 23°	1	29	30 mm	Perfect	Kos in September
October	22° / 20°	4	27	92 mm	Good	Kos in October
November	19° / 17°	4	26	116 mm	Good	Kos in November
December	16° / 14°	7	24	176 mm	Ok	Kos in December