July Nordic v Adriatic

My partner and I (queer US women in our late 30s) are only available to travel in late July this year. I hate crowds (but loved Tokyo, so I think I just hate loud/us-centric/touristy crowds), my partner finds 90 degrees F unbearable, and we are much more into food and coffee and wandering than parties. We loved Basque Country, Madrid’s parks, but I found Porto, Portugal spiking my agoraphobia. All that to say- we are debating going to Helsinki-tallin-Riga OR Ljubljana-kobarid-????? in July.

Does anyone have experience with these places during summer? Pros/cons/“hey you didn’t consider this?”? OR suggestions during summer for spots I haven’t considered? It seems like Helsinki may cost more, but I’m not sure about day to day stuff. Any comments appreciated!