Cool
Average highs are around 18°C, so pack for cooler days.
Weather Guide
Killarney, Ireland Average Monthly Weather
Weather score19Poor annual avg
Best months: July, June, August
Across the year, average daytime temperatures are around 13°C, sunshine averages 3.5h per day, and rainfall totals about 1371mm. Sea temperatures average 12°C across the year.
Annual weather
Annual averages
Temp
13°C
Rain
1371mm
Annual total
Sun
3.5h
Sea
12°C
Weather score
19
Poor avg
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
SwimSwim
Weather scoreWeather score
Trip feel
Drier
Rainfall averages 77mm, which is relatively low for holiday planning.
Limited sun
Sunshine averages 4.7h per day, so this is not one of the brighter months.
Cool sea
Sea temperatures average 15°C, so the water can feel cool.
Map
Weather map
Compare Killarney, Ireland with nearby places by weather score, rain, sun, temperature, and swim conditions.
Temperature
July18°C average high
July is one of Killarney's hottest months, so shade and slower afternoons matter.
Warmest monthsJune to September
This stretch sets the upper range for average daytime heat.
Rain
July77mm average rain
July is one of Killarney's driest months, making outdoor days easier to plan than in wetter parts of the year.
Driest monthsApril to August
This is the drier part of the year, when outdoor plans usually need less weather flexibility.
Sun
July4.7 hours average sun
July is brighter than Killarney's yearly average, though the strongest sunshine usually sits closer to the peak months.
Brightest monthsApril to July
This stretch has the strongest sunshine in the monthly averages.
Sea temperature
July15°C average sea
July is one of Killarney's warmest sea months, when swimming comfort is usually strongest.
Warmest seaJuly to September
Sea temperatures are usually near 15°C in this stretch, so swimming comfort is at its strongest.
Weather score
July34 weather score
July is one of Killarney's best weather-score months, combining the strongest overall balance in the yearly averages.
Best weather monthsJune to August
These months have the strongest weather score in the monthly averages.
