Killarney Weather in September

Killarney in September sees pleasant daytime temperatures of 19°C (66°F) and nighttime lows of 14°C (57°F). With the highest rainfall of the year it is wise to pack an umbrella and expect frequent showers.

Rainfall in Killarney in September

As the rainiest month, carrying an umbrella is advisable to manage the frequent rain. Expect around 11 days of rain based on historical data, with 115 mm (4.5 in) average. Rainfall intensity is on the higher side this month. Expect more substantial showers rather than light, passing rain.

Temperature in Killarney in September

Daytime highs in Killarney in September reach 19°C (66°F), with nights around 14°C (57°F). Conditions are often most pleasant around the middle of the day. At 14°C (57°F) overnight, it can feel quite a bit cooler after dark. Worth packing something warmer for evenings, but the cooler temperatures are ideal for sleeping.

If you prefer dry days with pleasant temperatures, June and July typically offer 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.