Belfast, where it's located

The climate of Belfast is oceanic, with quite cold, rainy winters and mild, relatively rainy summers.
The city is the capital of Northern Ireland and is located on the east coast.
The average temperature of the coldest month (January) is of 5.1 °C (41 °F), that of the warmest month (July) is of 15.4 °C (60 °F). In the exceptional cold spell of 2010, the temperature dropped to -15 °C (5 °F) at the Aldergrove airport (located outside the city, near Lough Neagh), and up to -13 °C (8.5 °F) at the harbour. Here are the average temperatures.
Belfast - Average temperatures
Min (°C)223471011119743
Max (°C)881012151819191713108
Min (°F)363637394550525248453937
Max (°F)464650545964666663555046

Precipitation amounts to 940 millimeters (37 inches) per year: so, it is at an intermediate level. It ranges from 65 mm (2.6 in) in the driest months (February, April, May, July) to 95 mm (3.7 in) in the wettest ones (October, November). Here is the average precipitation.
Belfast - Average precipitation

On average, there are around 1,245 sunshine hours per year. So, the sun doesn't shine often. Here are the average sunshine hours per day.
Belfast - Sunshine

The sea temperature ranges between 7 °C (45 °F) and 15 °C (59 °F). So, it is cold all year round. Here are the average sea temperatures.
Belfast - Sea temperature
Temp (°C)87781012141515141210
Temp (°F)464545465054575959575450


Best Time

The best time to visit Belfast is the summer, from June to August, since it is the mildest of the year. The temperatures are generally good for outdoors activities, although it's better to bring an umbrella, and a sweatshirt or sweater for the evening or for cool days.