Killarney Weather in December

NASA POWER reanalysis for the half-degree grid cell around Killarney, 1991-2020; a grid cell is an area average and can differ from a thermometer in town by several degrees

Average highs run from 25°C on December 1 to 24°C on December 31, and lows from 24°C to 23°C. Normal precipitation for the month is 37 mm over about 6 wet days.

December day by day

The normal high and low for each date, in °C.

Normal low
Normal high
Reanalysis extreme high
Reanalysis extreme low

December at a glance

Average high: 25°C
Average low: 23°C
Precipitation: 37 mm
Reanalysis high: 28°CDec 10, 2009
Reanalysis low: 15°CDec 27, 2010
Daylight: 10 h 42 min to 10 h 36 min
Cloud cover: 50%
Humidity: 76%
Dew point: 20°C
Wind: 22.3 km/h

Every day of the month

A wet day has at least 1 mm of precipitation in the reanalysis.

Date	Normal high	Normal low	Reanalysis high	Reanalysis low	Chance wet
Dec 1	25°C	24°C	27°C 2018	20°C 1999	26%
Dec 2	25°C	24°C	27°C 2018	20°C 1999	26%
Dec 3	25°C	24°C	27°C 2009	21°C 1999	25%
Dec 4	25°C	24°C	27°C 2018	21°C 2019	24%
Dec 5	25°C	24°C	27°C 2009	22°C 2000	24%
Dec 6	25°C	24°C	27°C 2009	20°C 2010	24%
Dec 7	25°C	24°C	26°C 1994	19°C 2010	23%
Dec 8	25°C	24°C	27°C 2017	19°C 2010	22%
Dec 9	25°C	24°C	27°C 2018	19°C 2010	23%
Dec 10	25°C	24°C	28°C 2009	20°C 1996	23%
Dec 11	25°C	24°C	27°C 2002	20°C 2014	23%
Dec 12	25°C	24°C	27°C 2002	20°C 2004	23%
Dec 13	25°C	24°C	27°C 2002	18°C 2010	21%
Dec 14	25°C	23°C	27°C 2019	16°C 2010	21%
Dec 15	25°C	23°C	27°C 2009	18°C 2010	21%
Dec 16	25°C	23°C	27°C 2015	19°C 2010	22%
Dec 17	25°C	23°C	27°C 2015	21°C 2007	21%
Dec 18	25°C	23°C	27°C 2015	21°C 2007	22%
Dec 19	24°C	23°C	26°C 2015	20°C 1991	22%
Dec 20	24°C	23°C	27°C 2018	19°C 2004	21%
Dec 21	24°C	23°C	26°C 2015	19°C 2004	21%
Dec 22	24°C	23°C	26°C 2015	20°C 2010	21%
Dec 23	24°C	23°C	27°C 2015	20°C 2012	21%
Dec 24	24°C	23°C	27°C 2015	20°C 1995	20%
Dec 25	24°C	23°C	27°C 2002	19°C 2020	20%
Dec 26	24°C	23°C	26°C 2015	17°C 2010	21%
Dec 27	24°C	23°C	26°C 2015	15°C 2010	22%
Dec 28	24°C	23°C	27°C 2015	16°C 2010	23%
Dec 29	24°C	23°C	27°C 2015	19°C 2010	23%
Dec 30	24°C	23°C	27°C 2015	19°C 2000	23%
Dec 31	24°C	23°C	27°C 2015	18°C 2000	22%

Chance of rain

Chance of a wet day

Sunrise and sunset

Times for 2026, local time (EST).

December 1: sunrise 6:38 AM, sunset 5:20 PM
December 31: sunrise 6:55 AM, sunset 5:31 PM

Every day of December: sun and moon

Other months

Sources

Cloud, humidity, wind and sunshine, and temperature and precipitation: NASA POWER (MERRA-2, CERES and GEWEX SRB), 1991-2020. The data was obtained from the National Aeronautics and Space Administration (NASA) Langley Research Center's Prediction Of Worldwide Energy Resources (POWER) project funded through the NASA Earth Science Division: POWER Daily API v2, accessed 2026-09-24. Sun and moon: computed with the NOAA solar equations and Meeus.