worldweatherIreland weather in September - temperature, rain and is it a good time to visit?
September is one of the best months for a holiday in Ireland.
Daytime
17°
Night
10°
☀️ Day length
12 h 44 min
Chance of rain
52%
Thunder days
1%
Humid days
13%
In September, Ireland averages about 17° during the day and 10° at night. Rain is fairly likely - around a 52% chance on a given day, so pack for showers.
Ireland weather all year - average temperatures and rain
| Month | Day | Night | Chance of rain |
|---|---|---|---|
| January | 8℃ | 3℃ | 75% |
| February | 8℃ | 2℃ | 67% |
| March | 9℃ | 3℃ | 58% |
| April | 12℃ | 5℃ | 56% |
| May ★ | 15℃ | 8℃ | 59% |
| June ★ | 18℃ | 11℃ | 50% |
| July ★ | 19℃ | 13℃ | 60% |
| August ★ | 18℃ | 12℃ | 69% |
| September ★ | 17℃ | 10℃ | 52% |
| October ★ | 14℃ | 8℃ | 59% |
| November | 10℃ | 5℃ | 63% |
| December | 9℃ | 4℃ | 71% |
★ - months most often recommended for travel
Where is it warmest in Ireland in September? Weather by city
| Place | Day | Night | 🌊 Sea | Chance of rain |
|---|---|---|---|---|
| Dublin | 17℃ | 9℃ | 16℃ | 64% |
| Belfast | 17℃ | 11℃ | - | 50% |
| Swords | 17℃ | 9℃ | 16℃ | 64% |
| Galway | 17℃ | 10℃ | 16℃ | 68% |
| Waterford | 17℃ | 11℃ | 15℃ | 28% |
| Limerick | 17℃ | 10℃ | - | 70% |
| Kilkenny | 17℃ | 11℃ | - | 13% |
| Cork | 16℃ | 10℃ | 15℃ | 71% |
| Sligo | 16℃ | 12℃ | 16℃ | 26% |
| Athlone | 15℃ | 9℃ | - | 69% |
Travelling soon? Check the live 14-day weather forecast for Ireland.