Belfast Weather in December
Average highs run from 25°C on December 1 to 25°C on December 31, and lows from 12°C to 13°C. Normal precipitation for the month is 152 mm over about 22 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
- 13°C
- Precipitation
- 152 mm
- Reanalysis high
- 33°CDec 17, 2003
- Reanalysis low
- 0°CDec 12, 1994
- Daylight
- 13 h 38 min to 13 h 43 min
- Cloud cover
- 73%
- Humidity
- 72%
- Dew point
- 13°C
- Wind
- 10.8 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 | 12°C | 32°C 2015 | 3°C 1995 | 72% |
| Dec 2 | 25°C | 12°C | 32°C 2002 | 6°C 1995 | 74% |
| Dec 3 | 25°C | 12°C | 33°C 2019 | 5°C 1998 | 75% |
| Dec 4 | 25°C | 12°C | 33°C 1992 | 4°C 1998 | 75% |
| Dec 5 | 25°C | 12°C | 33°C 2018 | 6°C 1991 | 75% |
| Dec 6 | 25°C | 12°C | 30°C 2006 | 8°C 1991 | 74% |
| Dec 7 | 25°C | 12°C | 32°C 2006 | 9°C 1991 | 73% |
| Dec 8 | 25°C | 12°C | 31°C 2003 | 9°C 2017 | 74% |
| Dec 9 | 25°C | 12°C | 32°C 2003 | 10°C 2005 | 75% |
| Dec 10 | 25°C | 12°C | 29°C 2008 | 9°C 1994 | 76% |
| Dec 11 | 25°C | 13°C | 30°C 2003 | 6°C 1994 | 76% |
| Dec 12 | 25°C | 13°C | 33°C 2003 | 0°C 1994 | 74% |
| Dec 13 | 25°C | 13°C | 30°C 2018 | 5°C 1994 | 74% |
| Dec 14 | 25°C | 13°C | 33°C 2003 | 8°C 1995 | 74% |
| Dec 15 | 25°C | 13°C | 32°C 2006 | 9°C 2017 | 73% |
| Dec 16 | 25°C | 13°C | 31°C 2003 | 10°C 2019 | 72% |
| Dec 17 | 25°C | 13°C | 33°C 2003 | 9°C 2008 | 72% |
| Dec 18 | 25°C | 13°C | 29°C 2003 | 8°C 2007 | 71% |
| Dec 19 | 25°C | 13°C | 31°C 2015 | 5°C 2007 | 71% |
| Dec 20 | 25°C | 13°C | 31°C 2008 | 8°C 2007 | 72% |
| Dec 21 | 25°C | 13°C | 33°C 2003 | 9°C 1997 | 74% |
| Dec 22 | 25°C | 13°C | 32°C 2008 | 11°C 1991 | 74% |
| Dec 23 | 25°C | 13°C | 29°C 2005 | 11°C 2007 | 74% |
| Dec 24 | 25°C | 13°C | 32°C 2015 | 10°C 1998 | 74% |
| Dec 25 | 25°C | 13°C | 31°C 2018 | 9°C 1992 | 75% |
| Dec 26 | 25°C | 13°C | 33°C 2018 | 6°C 1992 | 75% |
| Dec 27 | 25°C | 13°C | 32°C 2018 | 9°C 1992 | 76% |
| Dec 28 | 25°C | 13°C | 29°C 2015 | 11°C 2003 | 76% |
| Dec 29 | 25°C | 13°C | 30°C 2015 | 10°C 2007 | 74% |
| Dec 30 | 25°C | 13°C | 30°C 2020 | 8°C 2007 | 72% |
| Dec 31 | 25°C | 13°C | 30°C 2003 | 9°C 2007 | 71% |
Chance of rain
- Chance of a wet day
Sunrise and sunset
Times for 2026, local time (GMT+2).
- December 1
- sunrise 5:00 AM, sunset 6:38 PM
- December 31
- sunrise 5:11 AM, sunset 6:54 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.