@tshikutama -- Hi, Marc, and welcome to All Things Plants!
I looked at the weather forecast for Varberg and it seems your temps are staying above freezing, but not by a whole lot. If that is the case, you would probably be safe to plant tomatoes out now, but I would recommend giving them some protection; I wrap clear plastic around my tomato cages to give the young plants some extra warmth as well as protection from the wind, which seems to do as much damage as cold weather. Do you know the approximate dates for your last freeze in the spring and first freeze in the fall?
As for which varieties might work the best for you... I don't think I can help you too much there. Are you planning to buy plants, or start from seeds? If you are buying plants, then you will be limited by what is available. If starting from seeds, it may be a bit late for this year if your weather is already suitable for planting out. I would recommend asking at a local garden center (whether you actually want to buy anything there or not) for advice on varieties that are known to do well in your area.
I hope you have a great gardening season, and please join us in the "edibles and preserving" forum and let us know how your garden is doing!
Sandy
