Roundstone Weather in May
May in Roundstone typically sees daytime highs of 15°C (59°F) and nighttime lows of 9°C (48°F). Rainfall is also possible this month, so it's worth packing an umbrella.
Rainfall in Roundstone in May
Historically, May sees about 19 days of rain, with a monthly average of 99 mm (3.9 in). Rain this month is fairly typical, a standard mix of wet and dry days with no particularly heavy or persistent showers.
Temperature in Roundstone in May
Daytime temperatures in Roundstone reach 15°C (59°F) in May, dropping to 9°C (48°F) at night. Conditions are often most pleasant around the middle of the day. Nights drop to 9°C (48°F). Cold nights like these are actually great for sleeping well, as long as you have a warm enough duvet.
Sunshine in Roundstone in May
The area enjoys a moderate level of sunlight, with around 157 hours. It's a good balance between sunny and cloudy days.Our weather planner can help you find worldwide destinations with pleasant weather during this period. May, July and August typically offer the best weather for Roundstone.
Roundstone Temperature in May
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Roundstone Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Roundstone - and find the best time to visit.
Daily Historical Temperatures
47-year average (1976-2025)
Based on our historical records, temperatures in Roundstone typically stay consistent throughout May, with daily highs averaging around 15°C (59°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
47-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 Roundstone in May
Browse day-by-day weather records for Roundstone spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Roundstone historical weather extremes in May
The extremes listed below come from historical weather data collected in Roundstone from 1999 through 2026.
- On May 25, 2012, temperatures climbed to 26°C (79°F), marking the warmest May day on record.
- The coldest May day was on May 21, 2006, with a maximum of 7°C (45°F).
- The lowest overnight temperature recorded in May was 0°C (32°F) (May 8, 2004).
- The heaviest May precipitation occurred on May 25, 2005, when 38 mm (1.5 in) of precipitation fell.
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 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 Roundstone in May
Pack for changing conditions in Roundstone in May. Bring a mix of short and long sleeves, a warm layer like a hoodie or light jacket, and comfortable pants. The key is being able to add or remove layers as the days goes by. Prepare for significant rainfall with proper waterproof clothing and shoes. Sunglasses could come in handy during the sunnier parts of your trip.
What To Do in Roundstone 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 -
Camping4/10 -
Outdoor sports9/10
Roundstone 3-Day Forecast
Temperature Rainfall Sunshine Humidity
See the full Roundstone 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) 
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