Weather in Belfast in December 2024
- December is usually the wettest month of the year in Belfast;
Average weather
Average temperature in Belfast in December
The expected average maximum temperature in December is +10°C with a maximum of +13°C and a minimum of -2°C.
The average maximum temperature goes up 33% by the end of the month, compared with the beginning of the month, from +4°C to +9°C.
Is Belfast warm or cold in December?
Belfast is typically cool in December.
Maximum temperatures go down compared to the previous month from +10°C to +8°C. The minimum temperature also goes down from +5°C to +4°C.
Pack a sweater and a jacket as there will be cooler temperatures.
December is one of the coolest months in Belfast, here is the comparison with other months:
Water temperature in Belfast in December
Water in Belfast in December is Cold. It varies from +9°C to +12°C, with an average of +11°C. Note that the air temperature is lower than the water temperature, averaging around +8°C.
In December, water temperatures are average relative to the rest of the year:
Can you swim in Belfast in December?
Climate in Belfast in December
| November | December | January | ||||
|---|---|---|---|---|---|---|
| Avg. temperature | ||||||
| +10°C | +8°C | +8°C | ||||
| Min. temperature | ||||||
| -6°C | -13°C | -9°C | ||||
| Max. temperature | ||||||
| +18°C | +15°C | +15°C | ||||
| Rainfall | ||||||
| 82 mm | 84 mm | 75 mm | ||||
| Wind | ||||||
| 4 m/s | 4 m/s | 5 m/s | ||||
| Avg. water temperature | ||||||
| +12°C | +11°C | +9°C | ||||
| Humidity | ||||||
| 85% | 87% | 85% | ||||
| Air pressure | ||||||
| 1009 HPa | 1009 HPa | 1010 HPa | ||||
| Sunny days | ||||||
| 1 | 1 | 1 | ||||
| Cloudy days | ||||||
| 10 | 11 | 10 | ||||
| Rainy days | ||||||
| 18 | 18 | 18 | ||||
| Snowy days | ||||||
| 0 | 1 | 2 | ||||
December weather is still as ok as in November. It’s getting colder in December. From +10°C in the day, the average maximum temperature lowers to +8°C. Prepare for more rain. Average rainfall goes from 82 mm to 84 mm. Humidity rises from 85% to 87%. The average wind speed doesn’t change much during December, staying around 4 m/s. The amount of sunny days stay about the same, averaging 1 sunny days during the month.
Next month (January) brings a further decline in the weather.
Wind
The average wind speed is 6 m/s getting up to 11 m/s which is a medium breeze. You can feel it, especially getting out of the water.
The average wind speed in Belfast is gradually increasing during December, going from 1 m/s to 4 m/s over the course of the month.
Rain
How was the weather last December in Belfast?
Climate Change over Years
The climate in Belfast in December has not changed much over the last 43 years.
The average temperature was the lowest in 1979 (+11°C) and the highest in 1995 (+14°C). The driest year was 2003 with only 711 mm of rainfall, and the wettest year was 2019 with 1255 mm.
FAQ
Is December a good time to visit Belfast?
Can you sunbathe in Belfast in December?
Can you swim in Belfast in December?
Is Belfast rainy in December?
Is it sunny in Belfast in December?
Other cities in United Kingdom
Monthly weather in Belfast
Source of the data
For this page, we’ve looked at the typical weather in Belfast, based on historical hourly weather data from January 1, 1979, to December 31, 2023.
For past dates, we show actual recorded data at the location at that time. Forecasts are based on recorded weather during that day of the year, averaged over the total years for which we have records (unless stated otherwise). The daily temperature is the highest recorded temperature in the shadow during that day.