September · Ireland
Best time to visit Galway in September Weather, crowds & prices
Weather in Galway in September
Average temperature 14°C, 100 mm of rain, about 20 days with 6+ hours of sunshine and 82% humidity — based on the five most recent complete years of ERA5 data (2021–2025).
September score
7.6/10
Ranked #3 of 12 months
- Avg temp
- 14°C
- Rainfall
- 100 mm
- Humidity
- 82%
- Days with 6h+ sun
- 20
- Crowd Density
- Moderate Crowds
- Average Expenses
- $$ · Moderate Cost ($$)
September in Galway scores 7.6/10 for sightseeing and cultural travel - one of the top 12-month picks (#3). Expect around 14°C, 100 mm of rain, and roughly 20 days with 6+ hours of sunshine this month.
Galway's Latin quarter, buskers and Atlantic winds make it Ireland's festival city on the west coast.
September holds up well in Galway — 3rd best month
Temperatures hover around 14°C (58°F) — the kind of month where neither heat nor cold forces the schedule.
Budget for roughly 100 mm of rain this month — a flexible day or two helps — with about 20 days with 6+ hours of sunshine and 12.7 hours of daylight to work around it.
That is 7.6/10 on the same scale — 3rd of 12 months, versus 8/10 for the best month here.
Pack layers you can shed by midday plus one warm layer for the evening, a packable rain layer.
Expect mid-season pricing, and crowds are moderate.
Frequently asked
- What is the weather like in Galway in September?
- In September, Galway averages 14°C, 100 mm of rain, and about 20 days with 6+ hours of sunshine. Its climate-comfort score is 7.6/10.
- Is September a good time to visit Galway?
- September earns a 7.6/10 climate-comfort score. Use the year-round chart to weigh the weather against your budget and crowd preferences.
- How much does it rain in Galway in September?
- Expect about 100 mm of rain in September. Average humidity is 82% and there are about 20 days with 6+ hours of sunshine.
Curated in Galway
Tickets & experiences
Things to do in Galway
Galway, Ireland. Live activities and tours from GetYourGuide, matched to this destination.