Northern Ireland weather: Rain and showers on Monday, highs of 20C

Temperatures are forecast to reach between 17C and 20C across five regional centres.

By Andrew McBride1 min read

Northern Ireland weather forecast for 2026-08-17, showing conditions and temperatures for Belfast, Londonderry, Enniskillen, Newry and Coleraine — Today's forecast for Belfast, Londonderry, Enniskillen, Newry and Coleraine. Graphic: The Belfast Herald Picture: The Belfast Herald

Rain and showers are forecast across Northern Ireland on Monday, with daytime temperatures ranging from 17C to 20C. Overnight lows across the five regional forecasts range from 15C to 16C.

Belfast is forecast to reach 19C after a low of 16C, with rain. Londonderry is forecast to reach 17C after a low of 15C, with rain. Enniskillen is forecast to reach 19C after a low of 15C, with drizzle; Newry is forecast to reach 20C after a low of 16C, with drizzle; Coleraine is forecast to reach 18C after a low of 15C, with rain.

Belfast carries the highest maximum precipitation probability at 100 per cent. The strongest forecast wind in the regional sample is 18 km/h in Londonderry.

Tuesday's outlook puts the highest daytime temperature at 18C in Belfast and Newry, while drizzle is the most common condition in the five-location forecast.