What's the weather like going to Norway, Finland and Sweden in June 12?

I am currently in Tampere, Finland, and the weather is quite pleasant now. It's chilly in the morning and evening, so you definitely need to wear a coat. When the weather is clear, the temperature rises rapidly in the middle and afternoon. Compared with the domestic side, 20 degrees may be hotter, and those who are afraid of heat may have put on skirts or shorts. ? Nordic countries should be similar.