Depends on the distance from Adriatic Sea, the places in
Croatia has different weather conditions. Many cities of Croatia offer good weather year around and city of
Dubrovnik is a coastal region, so offers typical Mediterranean climate, but good for having a wonderful Croatia vacation. July & August are the warmest months and January & February are the coldest months of the year, so take all your winter clothes and enjoy your Croatia vacation. In Dubrovnik, there are plenty buses and taxis available for getting around, but walking around the old city is a great experience and I enjoyed well during my 12 days Croatia vacation. You can rent a car in Dubrovnik airport and reach the city within half an hour. And arrange for a Dubrovnik city excursion and explore old city, Trsteno and the medieval coast resort of Cavtat. Plus visit the island of Mljet with its national park and monastery, and the medieval town on the island of Korcula. If you are staying weekends then visit the charming Croatia beach resort of Cavtat, it's a wonderful place. Walking the ancient city walls of Dubrovnik is a wonderful experience, so enjoy and have a nice Croatia vacation.