Your climate would be similar to part of California?
Dry hot summer and wet cold (but not freezing) winter, right?
Temperatuer wise, perfect! You just want to protect your plant from the winter rain as it might ruin the plant.
As mentioned above, cold (you said down to 4C) is not an issue as long as it is not freezing, and actually beneficial in bringing the best flowering, so you will love your plant in bloom next spring!
They can take full sun, but in the dry hot climate, they may burn.
Leave them out and watch the leaves. If there is burn, then give it some shade, but they need strong light to do best.
Once the weather gets cold, make sure it is not exposed to too much rain.
You still have to water the plant during the winter, but not very much. As long as the canes (the plant stem) look plump, it is fine.
During the summer growing season, water a lot!
All my nobile hybrids are in bloom or budding at the moment. I love them!
Happy Growing!