My husband and I will be touring in Poland for two weeks in mid-June. I plan to bring a waterproof light jacket and a light sweater for outerwear. For footwear, I'll wear a comfortable walking shoe and bring a pair of sandals. For anyone who has been to Poland in June, do those seem like good choices?
I was there at the very end of May and will confirm your choices sound perfect to me, though I wore my usual walking boots and a pair of oxfords as my second since I'm not a sandal-wearer.
I experienced a wide range of weather, from 90 in Krakow--tank top or short-sleeved T, light sweater in the evening--to a low of 50 & rain in Warsaw and Gdansk, up to 70--long-sleeved T, light sweater, jacket and scarf worn all together.
Kathy, I think you should be fine. In mid-June you can expect around 25 Celsius degrees around noon. The temperature may fall to around 12-15 degrees in the evening, though. I guess, a waterproof light jacket is a good idea since in June once for a while we get suprised by summer rain (usually around 6pm).
Have you already decided what places you would like to see in Poland?