The temperatures in Ireland 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 Ireland 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 Ireland in September 2025.
If you’re planning to visit Ireland in the near future, we highly recommend that you review the 14 day weather forecast for Ireland before you arrive.
Temperatures
16° / 11°
Rainy Days
7
Snowy Days
0
Dry Days
23
Rainfall
89
mm
Sun Hours
9.1
Hrs
