Click on a day for an hourly weather forecast
The weather in Mersin in September is hot. The average temperatures are between 19°C and 30°C. Usually the days in September are hot while the nights are a bit cooler.
You can expect about 3 to 8 days of rain in Mersin during the month of September. It’s a good idea to bring along your umbrella so that you don’t get caught in poor weather.
Our weather forecast can give you a great sense of what weather to expect in Mersin in September 2025.
If you’re planning to visit Mersin in the near future, we highly recommend that you review the 14 day weather forecast for Mersin before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 12° / 5° | 7 | 24 | 0 | 133 mm | Bad | Mersin in January |
| February | 14° / 6° | 5 | 23 | 0 | 88 mm | Good | Mersin in February |
| March | 17° / 7° | 4 | 28 | 0 | 68 mm | Good | Mersin in March |
| April | 21° / 10° | 4 | 26 | 0 | 68 mm | Good | Mersin in April |
| May | 25° / 13° | 6 | 25 | 0 | 79 mm | Perfect | Mersin in May |
| June | 29° / 17° | 6 | 24 | 0 | 78 mm | Good | Mersin in June |
| July | 32° / 21° | 2 | 29 | 0 | 24 mm | Good | Mersin in July |
| August | 33° / 22° | 1 | 30 | 0 | 26 mm | Good | Mersin in August |
| September | 30° / 19° | 3 | 27 | 0 | 46 mm | Good | Mersin in September |
| October | 26° / 16° | 3 | 28 | 0 | 54 mm | Perfect | Mersin in October |
| November | 20° / 11° | 2 | 28 | 0 | 51 mm | Good | Mersin in November |
| December | 15° / 7° | 5 | 26 | 0 | 166 mm | Good | Mersin in December |