December weather forecast
Killarney, Ireland

As the final month of the year, December in Killarney is a crisp winter month with temperatures barely rising above single digits. The rainfall peaks yet again, almost rivalling the record rainfall of January at 166mm (6.54"). The city's weather can be quite severe for those unaccustomed to the cold, but many embrace it as part and parcel of the festive season. Despite shorter days and cold nights, Killarney glows brightly with its year-end festivities.

Temperature

Killarney experiences an average high-temperature of a chilly 9°C (48.2°F) in December, subtly different from November's 10°C (50°F). Throughout December in Killarney, a minimal difference from peak daytime temperatures is noted, marking a steady low-temperature average of 4°C (39.2°F).

Rainfall

The month with the most rainfall in Killarney is December, when the rain falls for 23 days and typically aggregates up to 166mm (6.54") of precipitation.

Daylight

The month with the shortest days is December, with an average of 7h and 48min of daylight.
On the first day of December, sunrise is at 8:24 am and sunset at 4:29 pm. On the last day of the month, sunrise is at 8:46 am and sunset at 4:36 pm GMT.

Sunshine

December has the least sunshine of the year, with an average of 1h of sunshine.

UV index

December is the month with the lowest UV index in Killarney, with an average maximum UV index of 0. A UV Index estimate of 2, and below, represents a low threat to health from unprotected exposure to Sun's UV rays for average individuals.
Note: In December, the maximum UV index of 0 transforms into these recommendations:
Although prolonged sun exposure does not typically bother most people, children, babies, and those with sensitive skin should always have protection. To prevent harmful UV exposure, minimize direct contact with the Sun around midday. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance.