Dublin in September
7.4out of 10
Possible, with caveats
Hot: daytime highs around 30°C. Frequent rain: about 10 rainy days.
30°CAvg high
20°CAvg low
10Rainy days (92 mm)
12:11 hDaylight
07:20Sunrise · 19:32 Sunset
Why this score
- Hot: daytime highs around 30°C
- Frequent rain: about 10 rainy days
What to wear and pack
- Light, breathable clothing
- Shorts or a light skirt
- Rain jacket or compact umbrella
- Sunscreen, sunglasses and a hat
How reliable is the forecast?
Rain in September varies a lot between years (±3.9 rainy days), so check the forecast closer to your trip. Averages cover 30 years (1991–2020). Individual days can differ a lot.
Year at a glance
Weather by month
| Month | Avg high | Avg low | Rainfall | Rainy days | Humidity | Sunshine | Score |
|---|---|---|---|---|---|---|---|
| January | 15°C | 4°C | 95 mm | 9 | – | – | 6.7 |
| February | 17°C | 6°C | 97 mm | 8 | – | – | 7.1 |
| March | 22°C | 9°C | 96 mm | 9 | – | – | 7.7 |
| April | 26°C | 13°C | 81 mm | 8 | – | – | 8.0 |
| May | 29°C | 18°C | 57 mm | 8 | – | – | 7.9 |
| June | 32°C | 22°C | 104 mm | 14 | – | – | 6.2 |
| July | 34°C | 23°C | 98 mm | 16 | – | – | 5.5 |
| August | 33°C | 23°C | 96 mm | 15 | – | – | 5.9 |
| September | 30°C | 20°C | 92 mm | 10 | – | – | 7.4 |
| October | 26°C | 14°C | 69 mm | 6 | – | – | 8.3 |
| November | 20°C | 8°C | 69 mm | 7 | – | – | 7.9 |
| December | 16°C | 5°C | 88 mm | 9 | – | – | 7.0 |
Frequently asked questions
How hot is Dublin in September?
Daytime highs average 30°C and nights about 20°C.
When is the best time to visit Dublin?
The best months are October, April, May, November.