Let’s get real about skin care and weather: I come from Costa Rica, a humid and warm place where all my life I kept retaining liquid and my skin behaved pretty much greasy. I’m not a dermatologist to talk about why or how, I just tell you about my experience 
So all that time I was following the routine of washing my face 2 times a day with a foamy wash, in the morning using a toner of the Face Shop (Chia), then serum, cream of the same line, then sometimes primer, and then whatever makeup I had time for. (Usually a LOT in comparison to my life in Germany)
When I moved to Germany I stopped retaining liquid, as a matter of fact I get easily dehydrated and my skin went from greasy to totally dry and peeling in winter. And by skin I don’t talk only about my face, no, weirdly enough my ankles get specially dry to a point where they are itchy and look like fish scales. My cute usual creams are absorbed in no time and I had to sleep with heavy Nivea cream on my face.
I went NUTS with skincare after this changes (tea tree oil, niacinamide, 2 washes a day, full chia treatment and heavy makeup remover) and my face was not so happy about the extreme care and not only got dry but had some random breakouts.
Now what I follow is only washing with water in the morning, ALWAYS using primer before whatever makeup I want to use and only do a full wash before going to bed to remove makeup and any impurities from the outside world only then using toner, serum and moisturizer. The niacinamide and tea tree oil are now for using a couple of times a month.
In general, be mindful of having full hydrating cream not only for your face, but for your arms and ankles! Specially in winter but also in summer (and remember always to use sunscreen 
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