Typical Weather

Weather in Belfast in September

How warm is it in Belfast in September?

In September the typical daytime high in Belfast is 17.0 °C on average, from 18.4 °C at the start to 15.5 °C at the end of the month.

That is 2.1 °C cooler than in August and 3.3 °C warmer than in October.

The last 10 years were 1.0 °C warmer than more than 40 years ago.

Click a day for more: afternoon and night, the usual range, records and how fast it is warming.

The average of the weather stations Armagh (54 km), Malin Head (125 km) and Dublin Phoenix Park (139 km); nearer ones count more.