My program department and I had a misunderstanding about the "new" VISA regulation, so it may be too late to apply for a student VISA to Spain by now (as I only have less than 1.5 month ...
Spain is a rather large country - so would be helpful to know where in Spain. It might be sunny and warm on the Costa Del Sol and snowing in the Sierra Nevada region!
This web site might be of interest to you: http://www.weatherbase.com/weather/city.php3?c=ES&refer=
I LOVE Spain and know you will have a good trip no matter what the weather is like!