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Galway Weather in May
Galway in May averages 16°C (61°F) during the day and 8°C (46°F) at night. Keep in mind that quite a bit of rainfall is expected this month.
Rainfall in Galway in May
Rain is expected on roughly 18 days, totalling around 86 mm (3.4 in) for the month. With rain spread across many days but low totals, showers are typically short and light rather than heavy.
Temperature in Galway in May
Daytime temperatures in Galway reach 16°C (61°F) in May, dropping to 8°C (46°F) at night. Conditions are often most pleasant around the middle of the day. At 8°C (46°F) overnight, it gets properly cold after dark. On the bright side, cold nights tend to make for excellent sleeping conditions.
Sunshine in Galway in May
The area enjoys a balanced 157 hours of sunlight, ensuring it's neither too overcast nor too sunny.If your ideal day consists of dry skies and pleasant temperatures, July typically offers the best circumstances for Galway.
Galway Temperature in May
Min Temperature
8°C (46°F)
Max Temperature
16°C (61°F)
Chance of Rain
60%
Precipitation
86 mm (3.4 in)
Rainy days
18 days
Humidity
73% *
Sunshine
157 hours *
Percentage Sunshine
39% *
* Data from: Claremorris, Ireland (49 KM, 30 Miles).
Galway Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Galway - and find the best time to visit.
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Galway typically stay consistent throughout May, with daily highs averaging around 16°C (61°F). Nights are cold, with lows typically ranging from 6°C (43°F) to 9°C (48°F).
Average temperatures in May
Daily Historical Precipitation
50-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in May
Historical weather records for Galway in May
Browse day-by-day weather records for Galway spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Galway historical weather extremes in May
Our historical data for Galway spans 1976 to 2026, revealing these weather extremes.
- The hottest May day on record in Galway reached 30°C (86°F) (May 26, 2026).
- On May 1, 1979, Galway saw its coldest May day with temperatures maxing out at 7°C (45°F).
- The lowest overnight temperature recorded in May was 0°C (32°F) (May 6, 2021).
Best Places in Ireland in May
Find out more about the weather in Ireland and which places have the best travel conditions in this month. See all of Ireland in May →
perfect weather
pleasant
tolerable
unpleasant
poor
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).
What to Wear in Galway in May
Comfortable temperatures call for an easy wardrobe in May. Pack summer basics like t-shirts and shorts, but include a light jacket for cooler moments. A pair of comfortable walking shoes is essential. Expect heavy rainfall, so bring good rain protection and waterproof bags. Bring sunglasses since you'll have some sunny periods throughout the month
What To Do in Galway in May
We rated the following activities from 1 (least suitable) to 10 (best) to do.
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Swimming5/10 -
Cycling6/10 -
Walking6/10 -
Barbeque6/10 -
Camping4/10 -
Outdoor sports9/10
Galway 3-Day Forecast
More climate data for Galway
Temperature Rainfall Sunshine Humidity
See the full Galway climate overview or explore weather in Ireland.
Popular in May
Where to go in May - average daytime high across popular destinations.
Galway
16°C (61°F) Kilkenny
16°C (61°F) Westport16°C (61°F) Kenmare
16°C (61°F) Killarney16°C (61°F) Dublin16°C (61°F) Cork
15°C (59°F) Doolin15°C (59°F) Bucket list
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