Belfast Weather in December
Average highs run from 9°C on December 1 to 9°C on December 31, and lows from 4°C to 2°C. Normal precipitation for the month is 95 mm over about 18 wet days.
December day by day
The normal high and low for each date, and the record, in °C.
- Normal low
- Normal high
- Record high
- Record low
December at a glance
- Average high
- 8°C
- Average low
- 3°C
- Precipitation
- 95 mm
- Record high
- 15°CDec 6, 2016
- Record low
- -9°CDec 22, 2010
- Daylight
- 7 h 41 min to 7 h 21 min
- Cloud cover
- 78%
- Humidity
- 94%
- Dew point
- 4°C
- Wind
- 22.7 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 | Record high | Record low | Chance wet |
|---|---|---|---|---|---|
| Dec 1 | 9°C | 4°C | 14°C 1986 | -2°C 1976 | 61% |
| Dec 2 | 9°C | 4°C | 14°C 1974 | -3°C 1976 | 60% |
| Dec 3 | 8°C | 4°C | 14°C 1986 | -5°C 1976 | 60% |
| Dec 4 | 9°C | 3°C | 15°C 2007 | -6°C 1976 | 60% |
| Dec 5 | 9°C | 3°C | 14°C 2017 | -5°C 1976 | 60% |
| Dec 6 | 10°C | 3°C | 15°C 2016 | -3°C 2010 | 59% |
| Dec 7 | 9°C | 3°C | 13°C 2016 | -4°C 1961 | 59% |
| Dec 8 | 9°C | 4°C | 14°C 2025 | -3°C 1960 | 58% |
| Dec 9 | 9°C | 4°C | 14°C 1994 | -6°C 1967 | 58% |
| Dec 10 | 9°C | 4°C | 15°C 1994 | -6°C 1981 | 58% |
| Dec 11 | 9°C | 4°C | 14°C 2000 | -5°C 1981 | 57% |
| Dec 12 | 9°C | 3°C | 14°C 1998 | -7°C 1981 | 56% |
| Dec 13 | 9°C | 4°C | 14°C 1998 | -5°C 1981 | 57% |
| Dec 14 | 8°C | 3°C | 13°C 1982 | -2°C 2022 | 56% |
| Dec 15 | 8°C | 3°C | 13°C 1998 | -2°C 1973 | 56% |
| Dec 16 | 9°C | 3°C | 14°C 2024 | -2°C 1968 | 55% |
| Dec 17 | 9°C | 3°C | 13°C 2015 | -3°C 1968 | 55% |
| Dec 18 | 8°C | 2°C | 15°C 2015 | -3°C 2010 | 56% |
| Dec 19 | 7°C | 2°C | 15°C 1971 | -4°C 2006 | 56% |
| Dec 20 | 8°C | 2°C | 14°C 2015 | -7°C 2010 | 57% |
| Dec 21 | 9°C | 2°C | 13°C 1974 | -8°C 2010 | 56% |
| Dec 22 | 8°C | 3°C | 13°C 1984 | -9°C 2010 | 57% |
| Dec 23 | 8°C | 3°C | 13°C 2024 | -7°C 2010 | 58% |
| Dec 24 | 8°C | 3°C | 14°C 2011 | -5°C 2010 | 59% |
| Dec 25 | 7°C | 2°C | 13°C 2011 | -6°C 1972 | 59% |
| Dec 26 | 8°C | 2°C | 13°C 1983 | -4°C 2010 | 60% |
| Dec 27 | 8°C | 2°C | 14°C 1987 | -8°C 1995 | 60% |
| Dec 28 | 8°C | 2°C | 14°C 1987 | -8°C 1995 | 61% |
| Dec 29 | 9°C | 2°C | 14°C 2006 | -7°C 2000 | 60% |
| Dec 30 | 8°C | 2°C | 14°C 2021 | -7°C 2000 | 61% |
| Dec 31 | 9°C | 2°C | 14°C 2014 | -7°C 1961 | 60% |
Chance of rain
- Chance of a wet day
Sunrise and sunset
Times for 2026, local time (GMT+0).
- December 1
- sunrise 8:22 AM, sunset 4:03 PM
- December 31
- sunrise 8:46 AM, sunset 4:07 PM
Other months
Sources
Records: NOAA GHCN-Daily, station UKE00105877, every year on file, quality-flagged values removed. Cloud, humidity, wind and sunshine: 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 2026-09-26. Sun and moon: computed with the NOAA solar equations and Meeus.