Weather in Porto late May

Last May, I spent three nights in Porto (nine in Portugal total). The first day in Porto, it was sunny and beautiful. The last two days. it was rainy. The other days in Portugal were all partly or mostly sunny, though - no rain til the last two in Porto.

The weather is different every year, of course.

Thanks vert much for the info. Do you remember the approximate temperature?

No, I don't recall, but it was not cold or hot most of the time. I had a light jacket that I wore fairly often I think and put on my sweatshirt too once it started raining.

You can view historical data for any city going back a number of years on www.timeanddate.com. Just plug in Porto and take a look at a few years' figures for late May (you'll see the drop-down box where you can designate the timeframe).