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

I am currently in Tampere, Finland, and the weather is quite pleasant now. It's a bit chilly in the morning and evening, and 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, 2 degrees may be hotter, and those who are afraid of heat may have put on skirts or shorts. ? Nordic countries should be similar.