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Killarney Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Killarney.
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Climate overview of Killarney
The climate in Killarney, Canada, is marked by large temperature swings across the seasons, ranging from 24°C (75°F) in July to -5°C (23°F) in January.
The city has a wet climate, receiving around 1046 mm (41 in) of rain/snowfall per year. Despite the high annual total, it has warm summers and very cold winters. September is the wettest month.
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, temperatures differ significantly between summer and winter months. On average, daytime temperatures range from a comfortable 24°C (75°F) in July to a very cold -5°C (23°F) in January.
Nighttime temperatures range from 18°C (64°F) in July to -13°C (9°F) in January.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Killarney
Killarney experiences significant rain/snowfall throughout the year, averaging 1046 mm (41 in) of precipitation annually. The amount of precipitation varies moderately throughout the year. The wettest month, September, sees around 115 mm (4.5 in) of rainfall, perfect for those who enjoy a bit of rain now and then. The driest month, February, still receives a respectable 56 mm (2.2 in) of snowfall. 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
Best Time to Visit Killarney
The most comfortable overall weather for exploring Killarney is usually found in June and July. Conditions are generally least comfortable in January, February, March, April, October, November and December.
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
Jan
very cold
Feb
very cold
Mar
cold
Apr
cold
May
mixed
Jun
excellent
Jul
excellent
Aug
very good
Sep
good
Oct
wet
Nov
cold
Dec
cold
- Best overall: June and July
- Warmest weather: July and August
- Fewer rainy days: March, April, May, June and July
- Seasonal pattern: Warm summers and very cold winters
- Coldest conditions: January, with freezing nights around -13°C (9°F).
Frequently asked questions about the climate in Killarney
What is the best time to visit Killarney?
June and July typically offer the most optimal weather in Killarney. In contrast, January, February, March, April, October, November and December tend to have less optimal conditions. Killarney has warm summers and very cold winters.
What temperatures can I expect in Killarney?
Daytime highs range from -5°C (23°F) in January to 24°C (75°F) in July. Nighttime lows range from -13°C (9°F) to 18°C (64°F). Temperatures vary considerably through the year.
How much rain does Killarney get?
Annual rainfall is around 1046 mm (41 in). September is the wettest month with 115 mm (4.5 in), while February is the driest with 56 mm (2.2 in).
Killarney 3-Day Forecast
Killarney on the map
Killarney is highlighted - select any city to see its climate.
Popular in September
Where to go in September - average daytime high across popular destinations.
Toronto
22°C (72°F) Niagara Falls23°C (73°F) Montréal
22°C (72°F) Ottawa22°C (72°F) Quebec City
20°C (68°F) Vancouver19°C (66°F) Calgary19°C (66°F) Whistler15°C (59°F) Bucket list
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