Hi Maf, I am keeping fingers crossed for some sunnier weather than you have been getting on the mountains. You should be able to count on some good weather in July/Aug and then things should really speed up.
With indoor growing, you effectively have 'midday sun' for 12 or 20 hours per day (depending on whether you are doing auto's or photo's)
With outdoor growing much depends on the country you are in. In northern europe it is often a case of choosing some genetic lines that you can rely on and hoping for some good weather as well.
In southern Spain, or Cali, by contrast, you could probably grow any of our 'indoor' collection in your back garden
Anyway, it's only June, plenty of time for the sun to sweep into Europe yet