Belfast in December
6.3out of 10
Possible, with caveats
Warm and comfortable: highs around 24°C. Very wet: about 18 rainy days.
24°CAvg high
13°CAvg low
18Rainy days (155 mm)
13:36 hDaylight
05:08Sunrise · 18:44 Sunset
Why this score
- Warm and comfortable: highs around 24°C
- Very wet: about 18 rainy days
What to wear and pack
- T-shirts and light layers
- A light jacket for cooler evenings
- Rain jacket or compact umbrella
How reliable is the forecast?
Rain in December varies a lot between years (±3.1 rainy days), so check the forecast closer to your trip. Averages cover 30 years (1991–2020). Individual days can differ a lot.
Year at a glance
Weather by month
| Month | Avg high | Avg low | Rainfall | Rainy days | Humidity | Sunshine | Score |
|---|---|---|---|---|---|---|---|
| January | 24°C | 14°C | 140 mm | 17 | – | – | 6.6 |
| February | 24°C | 13°C | 102 mm | 13 | – | – | 7.3 |
| March | 23°C | 12°C | 97 mm | 12 | – | – | 7.5 |
| April | 21°C | 9°C | 47 mm | 7 | – | – | 8.1 |
| May | 19°C | 6°C | 13 mm | 2 | – | – | 8.3 |
| June | 17°C | 3°C | 5 mm | 1 | – | – | 8.1 |
| July | 17°C | 2°C | 6 mm | 1 | – | – | 8.1 |
| August | 20°C | 5°C | 11 mm | 2 | – | – | 8.5 |
| September | 23°C | 8°C | 22 mm | 4 | – | – | 8.5 |
| October | 23°C | 10°C | 77 mm | 12 | – | – | 7.5 |
| November | 23°C | 12°C | 122 mm | 15 | – | – | 6.8 |
| December | 24°C | 13°C | 155 mm | 18 | – | – | 6.3 |
Frequently asked questions
How hot is Belfast in December?
Daytime highs average 24°C and nights about 13°C.
When is the best time to visit Belfast?
The best months are August, September, May, April.