Sure, if You want to join a bike tour in Riga, You would like to know if it is going to be sunny and warm, or rainy and cold.
Be advised that weather conditions, in the climate zone where Latvia and Riga is located, can change quite often.
Thats how it is – but generally, in summer and spring the weather in Riga is sunny and warm. Just be sure to take some rain jackets with you if it is looking like it may rain or you can see some dark clouds around.
During our bike tours around Riga, if the weather gets ugly, we can have a quick stop in one of the local coffeehouses – in summer the rain is usually not much longer than 5 to 10 minutes, and then it is sunny again like nothing has happened.