World Resorts Ireland Killarney Weather

Killarney weather in December

Weather in Killarney: December

Average day temperature: 47.0°F
Average night temperature: 42.5°F
Sea water temperature: 50.1°F
Number of sunny days: 2 days
Day length: 7.7 - 8.1 hours
Number of rainy days: 10 days
Precipitation totals: 5.0 in.

Air temperature in December, °F

Show year:
2024
2023
2022

The highest day temperature during December of 2024 was 53°F. At the same time the lowest night temperature was 30°F. Daily and nightly averages during December were 47.8°F and 43.3°F.

Sea water temperature in Killarney in December, °F

Show year:
2025
2024
2023

The average sea water temperature in December of 2024 was 50.8°F. The highest and lowest sea temperatures during the month were 52.2°F and 49.3°F.

Sunny, partly cloudy and cloudy days

Mostly all days in December are cloudy but sunny and partly cloudy days are also possible.

Precipitation total in December, in.

Precipitation total value in Killarney in December is 4.5 in. Other months of the year show relatively similar values.

Wind speed in December, mph

The average wind speed value in December is 9.8 mph It makes December one of the most windy months of the year.

Average sunny hours

This chart shows average number of hours during the day when sunlight can reach the ground. It depends on day length and cloudiness during the day. The average number of sunny hours in December is: 2.0.

Best time for vacation in Killarney

Sunniest months:
April 5 days
May 4 days
March 4 days
Warmest months:
July 64.5 °F
August 64.0 °F
June 62.0 °F
Warmest sea temp:
August 61.2 °F
July 60.7 °F
September 59.0 °F
Coldest months:
January 45.5 °F
December 47.0 °F
February 47.1 °F
Rainiest months:
December 10 days
January 9 days
February 8 days
Windiest months:
February 11.8 mph
December 11.3 mph
January 10.3 mph

Killarney on a weather map

Killarney
+41°F
N 6 mph
Feels like: +36°F
Precip.: 74%
Places in Ireland:
Name
°F
+41°F
+41°F
+45°F
+41°F
24 Hours Forecast
Killarney
Local time: 01:43
December 18, thursday
0300
41°F
N
6 mph
0600
45°F
N
12 mph
0900
46°F
N
14 mph
1200
45°F
E
10 mph
1500
43°F
E
12 mph
1800
41°F
E
17 mph
2100
43°F
NE
21 mph
December 19, friday
0000
43°F
E
20 mph
Units of measurement: °C / °F