HI Nathalie,
January can be very cold in the morning and evenings and then the sun comes out and it warms up, not sure what the temperature is but I feel the cold (am originally from San Diego, California) and wear jeans, top, and heavy cardigan in January.  February for me is bitter, the main problem is that the houses here are not built for the cold.  They do not seem to have cavity wall insulation, central heating etc etc.  It is as cold as it is in England in February, without the rain and the damp.  Most expats who live in Spain in the winter have put in central heating and have big log burners. They also have really thick rugs that they put on the floors for the winter. One of my friends has put a wooden floor over the tiled floor in their bedroom which makes a big difference. Â
La Montanosa is about 30 minutes drive from Alicante and 15 minutes from Aspe.  We often go to Aspe as just off the roundabout is an Aldi supermarket, which in this area at least has the best fresh veg and fruit and everything else they sell (as in England) is significantly cheaper. Â
I speak enough Spanish to get by, am not fluent, but I remember alot as I took it in high school in San Diego, and when I am in Spain, it comes back to me.  I believe that it is important to speak the language of the country you are in, so it is excellent that you speak Spanish.  Also many smaller restaurants and shops and out in the campo, Spanish don't speak English, so it is useful to have some Spanish. Â
My boyfriend's sister had a house on the urb in La Montanosa, and we had stayed there on several occasions so when we decided to buy in Spain, we looked here.  We also looked at Mojacar, on the coast, where another one of my friends has a semi-, but she was in a complex with a shared pool and it was horrible, the beach was crowded and even though the signs said the communal pool was closed at 12 midnite, the Spanish children were in the pool up to 2am so we never got any sleep. Â
We also looked inland from Almeria, in a place called Arboleas, but in the end we preferred the mountains and the area here. Â
My blog is on the expat.com site under blogs, you could have a look as I have done some posts about the area. It is called Canterbury tales and Spanish Siestas.Â
Best
Terrylee 