Spring (March–May): Average 45–54°F, mild and rainy, with the most rainfall in March. Common activities: Hiking, exploring Killarney National Park. Recommended clothing: Waterproof jacket, warm layers, comfortable hiking shoes.
Summer (June–August): Average 57–60°F, warm and humid, with relatively less rainfall. Common activities: Boat trips, cycling, visiting Muckross House. Recommended clothing: Light and breathable clothing, rain gear.
Autumn (September–November): Average 53–56°F, cool and rainy, with more rainfall in September and November. Common activities: Sightseeing, visiting castles. Recommended clothing: Warm jacket, waterproof clothing.
Winter (December–February): Average 42–46°F, cold and humid, with moderate rainfall. Common activities: Indoor sightseeing, enjoying traditional Irish pubs. Recommended clothing: Thick coat, warm layers, waterproof boots.
Weather in Killarney
Annual average temperature: approx. 51.3°F / Annual rainfall: approx. 1424 mm / Summer humidity: 70%–80% / Rainiest month: March
Killarney weather by month
Month
Temperature (°F)
Rainfall (mm)
January
42.8°F
113.1
February
46.4°F
129.1
March
45.5°F
155.7
April
48.7°F
92.4
May
54.3°F
68.1
June
57.7°F
95.3
July
58.6°F
95.6
August
60.3°F
93.1
September
56.8°F
152.6
October
53.4°F
139.6
November
48.2°F
153.9
December
43°F
135.6
7-day weather forecast for Killarney
11/12
Thursday
Sunny
44.2°F/32.4°F
11/13
Friday
Overcast
45.6°F/30.4°F
11/14
Saturday
Patchy rain nearby
50.5°F/41.9°F
11/15
Sunday
Patchy rain nearby
46.4°F/35.7°F
11/16
Monday
Patchy rain nearby
42.8°F/33.1°F
11/17
Tuesday
Light drizzle
42.6°F/37°F
11/18
Wednesday
Partly Cloudy
45.7°F/34.7°F
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