Portlaoise Weather in December
Average highs run from 8°C on December 1 to 7°C on December 31, and lows from 3°C to 2°C. Normal precipitation for the month is 96 mm over about 19 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
- 7°C
- Average low
- 3°C
- Precipitation
- 96 mm
- Reanalysis high
- 14°CDec 10, 1994
- Reanalysis low
- -7°CDec 11, 2017
- Daylight
- 7 h 56 min to 7 h 39 min
- Cloud cover
- 74%
- Humidity
- 96%
- Dew point
- 4°C
- Wind
- 20.9 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 | 8°C | 3°C | 12°C 2015 | -3°C 2010 | 60% |
| Dec 2 | 8°C | 3°C | 12°C 1995 | -5°C 2010 | 58% |
| Dec 3 | 8°C | 3°C | 12°C 1995 | -6°C 2010 | 57% |
| Dec 4 | 8°C | 3°C | 13°C 2007 | -2°C 2010 | 56% |
| Dec 5 | 8°C | 3°C | 12°C 2007 | -3°C 2010 | 56% |
| Dec 6 | 8°C | 3°C | 13°C 2007 | -4°C 2010 | 56% |
| Dec 7 | 8°C | 3°C | 13°C 2016 | -5°C 2010 | 56% |
| Dec 8 | 8°C | 3°C | 12°C 2007 | -5°C 2010 | 55% |
| Dec 9 | 8°C | 3°C | 12°C 2016 | -2°C 2010 | 56% |
| Dec 10 | 7°C | 3°C | 14°C 1994 | -6°C 2017 | 56% |
| Dec 11 | 7°C | 3°C | 13°C 1994 | -7°C 2017 | 55% |
| Dec 12 | 7°C | 3°C | 13°C 2013 | -1°C 1995 | 54% |
| Dec 13 | 7°C | 3°C | 12°C 2013 | -3°C 1996 | 55% |
| Dec 14 | 7°C | 3°C | 12°C 1998 | -3°C 1996 | 55% |
| Dec 15 | 7°C | 3°C | 12°C 2013 | -3°C 2001 | 55% |
| Dec 16 | 7°C | 3°C | 13°C 2015 | -2°C 2010 | 55% |
| Dec 17 | 7°C | 3°C | 12°C 2015 | -2°C 2010 | 56% |
| Dec 18 | 7°C | 3°C | 13°C 2015 | -4°C 2010 | 56% |
| Dec 19 | 7°C | 2°C | 13°C 2015 | -4°C 1999 | 56% |
| Dec 20 | 7°C | 2°C | 11°C 2017 | -5°C 2010 | 56% |
| Dec 21 | 7°C | 2°C | 12°C 2014 | -7°C 2010 | 55% |
| Dec 22 | 7°C | 2°C | 13°C 2015 | -6°C 2010 | 56% |
| Dec 23 | 7°C | 2°C | 12°C 1991 | -5°C 2010 | 57% |
| Dec 24 | 7°C | 2°C | 10°C 2002 | -6°C 2010 | 57% |
| Dec 25 | 7°C | 2°C | 12°C 2011 | -5°C 2010 | 56% |
| Dec 26 | 7°C | 2°C | 11°C 2011 | -4°C 1995 | 56% |
| Dec 27 | 7°C | 2°C | 11°C 2019 | -4°C 1995 | 57% |
| Dec 28 | 7°C | 2°C | 12°C 1994 | -3°C 1995 | 57% |
| Dec 29 | 7°C | 2°C | 12°C 2006 | -4°C 2000 | 57% |
| Dec 30 | 7°C | 2°C | 12°C 2015 | -3°C 2003 | 56% |
| Dec 31 | 7°C | 2°C | 12°C 2011 | -4°C 2009 | 57% |
Chance of rain
- Chance of a wet day
Sunrise and sunset
Times for 2026, local time (GMT).
- December 1
- sunrise 8:20 AM, sunset 4:16 PM
- December 31
- sunrise 8:43 AM, sunset 4:22 PM
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.