Click on a day for an hourly weather forecast
The temperatures in Dublin in September are comfortable with low of 16°C and and high up to 28°C.
There shouldn't be any rainy days in in Dublin during September. Having said that, the days are very hot in September so hanging out outside is more recomanded during the after noons and evening time.
Our weather forecast can give you a great sense of what weather to expect in Dublin in September 2025.
If you’re planning to visit Dublin in the near future, we highly recommend that you review the 14 day weather forecast for Dublin before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 14° / 6° | 5 | 27 | 0 | 98 mm | Good | Dublin in January |
| February | 15° / 6° | 4 | 24 | 0 | 91 mm | Good | Dublin in February |
| March | 16° / 7° | 6 | 25 | 0 | 103 mm | Good | Dublin in March |
| April | 19° / 8° | 3 | 27 | 0 | 44 mm | Good | Dublin in April |
| May | 22° / 11° | 1 | 30 | 0 | 23 mm | Good | Dublin in May |
| June | 26° / 14° | 1 | 29 | 0 | 9 mm | Perfect | Dublin in June |
| July | 29° / 16° | 0 | 31 | 0 | 6 mm | Good | Dublin in July |
| August | 28° / 16° | 0 | 31 | 0 | 4 mm | Perfect | Dublin in August |
| September | 28° / 16° | 0 | 30 | 0 | 9 mm | Perfect | Dublin in September |
| October | 23° / 13° | 2 | 29 | 0 | 39 mm | Perfect | Dublin in October |
| November | 17° / 9° | 3 | 27 | 0 | 62 mm | Good | Dublin in November |
| December | 13° / 6° | 5 | 26 | 0 | 86 mm | Ok | Dublin in December |