Click on a day for an hourly weather forecast
The temperatures in Cork in September are usually low and can range between 11°C and 16°C.
You can expect about 3 to 8 days of rain in Cork 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 Cork in September 2025.
If you’re planning to visit Cork in the near future, we highly recommend that you review the 14 day weather forecast for Cork before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 8° / 4° | 9 | 20 | 2 | 107 mm | Awful | Cork in January |
| February | 9° / 4° | 8 | 19 | 2 | 88 mm | Awful | Cork in February |
| March | 10° / 4° | 6 | 23 | 2 | 79 mm | Bad | Cork in March |
| April | 12° / 5° | 6 | 24 | 0 | 79 mm | Ok | Cork in April |
| May | 14° / 8° | 7 | 24 | 0 | 91 mm | Ok | Cork in May |
| June | 16° / 10° | 6 | 24 | 0 | 109 mm | Good | Cork in June |
| July | 18° / 12° | 7 | 24 | 0 | 114 mm | Ok | Cork in July |
| August | 18° / 12° | 7 | 24 | 0 | 124 mm | Ok | Cork in August |
| September | 16° / 11° | 6 | 24 | 0 | 98 mm | Good | Cork in September |
| October | 14° / 9° | 8 | 23 | 0 | 122 mm | Ok | Cork in October |
| November | 10° / 6° | 8 | 22 | 0 | 114 mm | Bad | Cork in November |
| December | 9° / 5° | 8 | 21 | 1 | 133 mm | Bad | Cork in December |