Weather Belfast: Your Complete Guide to December 2025 Conditions and Forecasts

Understanding Belfast’s Weather Patterns

Belfast’s weather remains a crucial daily consideration for residents and visitors alike, particularly as Northern Ireland’s capital experiences its characteristically unpredictable winter conditions. With daytime temperatures typically reaching 8°C in December and falling to 2°C at night, understanding the forecast helps people plan their activities and prepare appropriately for the elements.

Current Weather Conditions in Belfast

Recent forecasts indicate challenging weather conditions for Belfast residents. The city is experiencing windy afternoon conditions with highs around 49°F (approximately 9°C), with winds from the southeast at 20 to 30 mph. Rain chances stand at 100%, with rainfall around half an inch, creating potential for localised flooding. Weather services have also issued warnings, with wind alerts affecting the region during peak hours.

December Weather Overview

The average temperature in Belfast during December is 6°C, making it one of the cooler months. There are usually 20 days with some rain in Belfast in December, with average monthly rainfall of 94mm. The limited daylight hours compound the winter atmosphere, with normally just 1 hour of bright sunshine each day – representing only 18% of daylight hours.

Planning for Belfast Weather

Residents and visitors should prepare for predominantly wet and overcast conditions throughout December. Average daily high temperatures decrease from 47°F to 45°F (approximately 8°C to 7°C), with conditions overcast or mostly cloudy about 66% of the time. Proper rain gear and warm clothing are essential for navigating Belfast’s winter weather comfortably.

Conclusion: Why Belfast Weather Matters

Understanding Belfast’s weather patterns proves vital for daily planning, from commuting to outdoor activities. With reliable forecast services from the Met Office and other meteorological organisations, residents can stay informed about changing conditions. As December progresses with its characteristic rain and wind, checking daily forecasts becomes increasingly important for safety and comfort. Whether planning a journey across the city or scheduling outdoor activities, staying updated on Belfast’s weather conditions helps ensure preparedness for whatever the Northern Irish climate delivers.