Killarney Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Killarney.
Climate overview of Killarney
Killarney, Kerry, Ireland, experiences moderate temperature changes through the seasons. July is the warmest month with daytime highs of 19°C (66°F), while January is the coolest at 9°C (48°F).
Rain/snowfall is high, totalling around 1283 mm (51 in) per year. December is the wettest month and September the driest. The most sunshine falls in May, with an average of 6.0 hours of daily sunshine.
Killarney Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Killarney - and find the best time to visit.
Monthly Temperature in Killarney
In Killarney, seasonal changes bring about a moderate variation in temperatures. Average maximum daytime temperatures range from a pleasant 19°C (66°F) in July, the warmest time of the year, to a chilly 9°C (48°F) during cooler months like January.
At night, you can expect temperatures ranging from 11°C (52°F) in July to around 3°C (37°F) during January.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Killarney
Killarney has a relatively rain/snowy climate with high precipitation levels, averaging 1283 mm (51 in) of rain/snowfall annually. Year-round, Killarney has a balanced climate with minimal variation in precipitation. The difference between the wettest month, December, with 128 mm (5 in), and the driest month, September, with 93 mm (3.7 in), is minimal. For more details, please visit our Killarney Precipitation page.
The mean monthly precipitation over the year, including rain, hail, and snow
The average number of days each month with precipitation
Sunshine Hours in Killarney
Seasonal changes in sunshine hours are quite dramatic in Killarney. While May receives considerable daily sunshine with up to 6.0 hours, December marks the darkest time of the year, where sunshine is scarce with only 1.3 hours of sunlight per day.
Visit our detailed sunshine hours page for more information.
Monthly hours of sunshine
Daily hours of sunshine
Daily percentage of sunshine
Humidity in Killarney by Month
The relative humidity is high throughout the year in Killarney.
The city experiences its highest humidity in July, reaching 80%. In April, the humidity drops to its lowest level at 72%. What does this mean? Read our detailed page on humidity levels for further details.
Relative humidity over the year
Best Time to Visit Killarney
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
- Best overall: June
- Warmest weather: June, July and August
- Most sunshine: May
Frequently asked questions about the climate in Killarney
What is the best time to visit Killarney?
June typically offers the most optimal weather in Killarney. In contrast, January, February, April, November and December tend to have less optimal conditions.
What temperatures can I expect in Killarney?
Daytime highs range from 9°C (48°F) in January to 19°C (66°F) in July. Nighttime lows range from 3°C (37°F) to 11°C (52°F).
How much rain does Killarney get?
Annual rainfall is around 1283 mm (51 in). December is the wettest month with 128 mm (5 in), while September is the driest with 93 mm (3.7 in).
How sunny is Killarney?
Killarney receives around 1,268 hours of sunshine per year. May is the sunniest month with 180 hours, while December is the cloudiest with just 40 hours.
Killarney 3-Day Forecast
Killarney on the map
Killarney is highlighted - select any city to see its climate.
Popular this month
Where to go in August - average daytime high across popular destinations.
Bucket list
Need travel inspiration? Check out our bucket list articles and be inspired.
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
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
Horseback riding in Ireland
Ireland is the most ideal place in the world for horseback riding. Combine this with the most hospitable people you will ever encounter and you have an unforgettable dream trip to add to your bucket list.