The multi-faith event at St Mirin's Cathedral on August 4 is part of the Renfrewshire Reflects commemorations.
The service starts at 10.15pm and finishes at 11pm when a candle will be extinguished, reflecting the words of then Foreign Secretary Sir Edward Grey who said: "The lamps are going out all over Europe and we shall not see them lit again in our lifetime."
Members of PACE Youth Theatre will read war poems and extracts from First World War letters sent by a mother to her son at the front and by a serving soldier to his wife.
Paisley Lord Provost Anne Hall said: "I would like to invite everyone who can attend to join me at St Mirin's Cathedral on August 4 to mark the 100th anniversary of Britain's entry into the First World War. We will not be celebrating the event.
"At the time, the First World War was the most terrible conflict humanity had ever seen.
"It was originally called the Great War and the war to end all wars.
"We will be coming together to reflect on events which cost the lives of millions of people across the globe and give thanks for the peace we enjoy."
All the lights except one will be switched off in Renfrewshire Council's headquarters.
Lights Out is a UK-wide invitation for everyone to turn off their lights from 10pm until 11pm on August 4, leaving on a single light for a shared moment of reflection.
The St Mirin's Cathedral event is free and tickets are not required.
Anyone interested in attending should contact Dorothy Kerr on 0141 618 7578 or email email@example.com