An Irish adventure like no other in Killarney National Park
Head down to the South West part of the country, County Kerry, to the small town of Killarney. If you want to experience what Ireland is really all about
Killarney Weather in May
May in Killarney brings moderate temperatures, with daytime highs of 16°C (61°F) and nights around 7°C (45°F). Quite a bit of rainfall is expected, around 98 mm (3.9 in), so pack an umbrella.
Rainfall in Killarney in May
You can expect rain on roughly 18 days based on historical data, averaging 98 mm (3.9 in) for the month. Rain this month is fairly typical, a standard mix of wet and dry days with no particularly heavy or persistent showers.
Temperature in Killarney in May
In May, Killarney sees moderate temperatures, with highs of 16°C (61°F). Nights drop to around 7°C (45°F). This creates a mild day-to-night pattern that is generally easy to manage with the right clothing. Nights drop to 7°C (45°F). Cold nights like these are actually great for sleeping well, as long as you have a warm enough duvet.
Sunshine in Killarney in May
The month experiences a moderate amount of sunlight, with 180 hours of sunshine. This provides a nice balance between sunshine and clouds.If your ideal day consists of dry skies and pleasant temperatures, June typically offers the best circumstances for Killarney.
Killarney Temperature in May
Min Temperature
7°C (45°F)
Max Temperature
16°C (61°F)
Chance of Rain
61%
Precipitation
98 mm (3.9 in)
Rainy days
18 days
Humidity
73% *
Sunshine
180 hours *
Percentage Sunshine
42% *
* Data from: Valentia, Ireland (52 KM, 32 Miles).
Killarney Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Killarney - and find the best time to visit.
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Killarney typically stay consistent throughout May, with daily highs averaging around 16°C (61°F). Nights are cool, with lows typically ranging from 7°C (45°F) to 10°C (50°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 Killarney in May
Browse day-by-day weather records for Killarney spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Killarney historical weather extremes in May
The extremes listed below come from historical weather data collected in Killarney from 1976 through 2026.
- The hottest May day on record in Killarney reached 31°C (88°F) (May 26, 2026).
- Killarney experienced its chilliest May day on May 2, 1986, reaching only 8°C (46°F).
- The lowest overnight temperature recorded in May was 0°C (32°F) (May 7, 2021).
- The wettest May day on record brought 47 mm (1.9 in) of precipitation to Killarney (May 6, 1978).
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 Killarney in May
Pack for changing conditions in Killarney 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. Bring sunglasses since you'll have some sunny periods throughout the month
What To Do in Killarney 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
Killarney 3-Day Forecast
More climate data for Killarney
Temperature Rainfall Sunshine Humidity
See the full Killarney 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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