Copenhagen, Helsinki, St. Petersburg, Talinin, Stockholm in June. What should I pack in terms of clothes for weather. Warm during day, cool at night?

Need umbrella?

Sweater?

Thank you for your suggestions.

Daytime temps in those cities during June can range anywhere from low 60's F. to low 80's F. - nighttime temps will be 5 to 10 degrees cooler (but you'll be mostly indoors onboard your ship) and yes, like anywhere else except the desert it can rain. Pack accordingly. Bringing a sweater is always a good idea.

Can you give us a clue as to which June you are referring to, this June or next June? St Petersburg is generally hot during June IME and I have been there quite a number of times, temps are in the 80Fs at the moment. If you are staying in the city at all, take mosquito repellent. Copenhagen, Helsinki and Stockholm have been exceptional this year, hot since mid May, warnings have been issued regarding risk of forest fires, temps have cooled a little from 75F-80F experienced earlier in the month. If it is next June, who knows, it could be a cool summer, take layers and be prepared for changeable weather.