How is the weather on this tour starting dates early September?
I always figure the weather charts at the bottom of the page are as good as it gets for general temperature/rain ideas.
Weather forecast for Ljubljana from the 1st thru the 11th is for day time highs in the Low 70s and night time lows in the high 50s. Afternoon rains mid week.
Enjoy it Ljubljana is really neat place and then on through Croatia down to the Adriatic Sea islands eventually to Dubrovnik. Hope you get to go in to Bosnia a time I will not forget. Who is your guide?
There is a great web site, timeanddate.com. Type in any city name and you will get all kinds of weather related information.
We did this trip a few years ago in early September and haid nice weather but didn't put on shorts until we arrived in Split. Another sorce of information is accuweather.com. Type in the locations and then choose the 'Month' tab for a dropdown list of months. When you choose the month you can then choose the current or a few past years and see the forecast for this year, the actual day/night temps for last year, and the historical temp averages.
We did this trip in early September and had great weather. It was warm so I bought a sleeveless top in a shop along the coast. I still get compliments when I wear it. I think a brief downpour while having lunch once. Everyone moved indoors and shared tables. Met some lovely German tourists. After lunch, sunny again.
We booked a day tour to Montenegro after the tour and it poured in Kotor, but a lovely, sunny lunch an hour or so later on the coast. Loved this tour.
We took this tour early September last year. The weather was delightful. That said, we always bring a lightweight waterproof jacket. Ours were put to the test a couple days ago after arriving in Budapest. We were happy to have them for the short walk to the market & restaurant. It was short lived! Both of our jackets compress to a small "ball" or even better compressed flat in a zip lock bag. Since that brief rainstorm it's been warm. Enjoy the Adriatic Tour!