Click on a day for an hourly weather forecast
The weather in Ios in September is very hot. The average temperatures are between 24°C and 24°C, drinking water regularly is advisable.
You can expect a few rainy days in Ios 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 Ios in September 2025.
If you’re planning to visit Ios in the near future, we highly recommend that you review the 14 day weather forecast for Ios before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 15° / 13° | 4 | 27 | 0 | 87 mm | Good | Ios in January |
| February | 15° / 13° | 3 | 25 | 0 | 81 mm | Good | Ios in February |
| March | 15° / 14° | 3 | 28 | 0 | 54 mm | Good | Ios in March |
| April | 17° / 16° | 1 | 29 | 0 | 20 mm | Good | Ios in April |
| May | 20° / 19° | 1 | 30 | 0 | 29 mm | Good | Ios in May |
| June | 23° / 22° | 1 | 29 | 0 | 15 mm | Perfect | Ios in June |
| July | 25° / 24° | 0 | 31 | 0 | 3 mm | Perfect | Ios in July |
| August | 26° / 25° | 0 | 31 | 0 | 4 mm | Perfect | Ios in August |
| September | 24° / 24° | 1 | 29 | 0 | 19 mm | Perfect | Ios in September |
| October | 22° / 21° | 2 | 29 | 0 | 51 mm | Good | Ios in October |
| November | 19° / 18° | 3 | 27 | 0 | 52 mm | Good | Ios in November |
| December | 16° / 15° | 4 | 27 | 0 | 75 mm | Good | Ios in December |