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

The average high-temperature during December is a frosty 9°C (48.2°F), almost matching the conditions of the preceding month. Killarney, during the nights of December, averages a temperature close to its daytime high, at an icy 4°C (39.2°F).

Rainfall

December is the month with the most rainfall. Rain falls for 23 days and accumulates 166mm (6.54") of precipitation.

Daylight

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

The month with the lowest UV index is December, with an average maximum UV index of 0. A UV Index estimate of 2, and below, represents a minimal health hazard from exposure to the Sun's UV rays for average individuals.
Note: A typical high UV index of 0 in December suggests the following recommendations:
In contrast to children, who must always be shielded from the sun, most people can tolerate up to an hour of sun exposure without any burns. Direct exposure to the Sun during its peak hours around mid-day should be minimized for safety. Stay sun-safe with clothing that is both closely woven and worn loosely.