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 August
In Killarney, August brings pleasant daytime temperatures around 19°C (66°F), with nights cooling to 11°C (52°F). Expect quite a bit of rainfall this month.
Rainfall in Killarney in August
Typically, about 20 days will experience rainfall, with an average of 102 mm (4 in) for the month. Expect frequent rainfall this month, and not just light drizzle. When it rains, it tends to come down hard.
Temperature in Killarney in August
If you're visiting Killarney in August, expect highs of 19°C (66°F) and overnight lows around 11°C (52°F). The month of August belongs to the summer season. Even when the weather is stable, mornings and evenings can still feel distinctly cool. Nights cool down to 11°C (52°F), so a light jacket or extra layer is useful once the sun goes down. On the plus side, the cooler nights make for comfortable sleeping conditions.
Sunshine in Killarney in August
With about 139 hours of sunshine, the area enjoys a nice balance of sun and overcast, creating a pleasant environment.If you prefer dry days with pleasant temperatures, June typically offers the best circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.
Killarney Temperature in August
Min Temperature
11°C (52°F)
Max Temperature
19°C (66°F)
Chance of Rain
65%
Precipitation
102 mm (4 in)
Rainy days
20 days
Humidity
78% *
Sunshine
139 hours *
Percentage Sunshine
33% *
* 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 August, with daily highs averaging around 19°C (66°F). Nights are cool, with lows around 13°C (55°F).
Average temperatures in August
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 August
Historical weather records for Killarney in August
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 August
Based on 50 years of weather observations in Killarney between 1976 and 2026, these are the recorded extremes.
- Killarney recorded its highest August temperature of 28°C (82°F) on August 13, 2022.
- On August 28, 1986, Killarney saw its coldest August day with temperatures maxing out at 13°C (55°F).
- Nighttime temperatures dropped to 4°C (39°F) on August 25, 2018, marking the coldest August night on record.
- The wettest day in August Killarney was on August 13, 2002 with 56 mm (2.2 in) of precipitation.
Best Places in Ireland in August
Find out more about the weather in Ireland and which places have the best travel conditions in this month. See all of Ireland in August →
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 August
For Killarney in August, you'll want flexible clothing. It's wise to pack cotton shirts, comfortable shorts, and a pair of jeans for cooler evenings. A light sweater or jacket is useful for air-conditioned spaces (like buses) or unexpected cool moments. High rain levels are expected, so pack waterproof gear and an umbrella or poncho. Bring sunglasses since you'll have some sunny periods throughout the month
What To Do in Killarney in August
We rated the following activities from 1 (least suitable) to 10 (best) to do.
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Swimming6/10 -
Cycling9/10 -
Walking9/10 -
Camping6/10 -
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 August
Where to go in August - average daytime high across popular destinations.
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An Irish adventure like no other in Killarney National Park
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