These are the weather pages I use.
The weather is normally better than they predict.
It's very rare for the temperature to go below -1C.
This one has a 15 day forecast.
http://www.accuweather.com/world-forecast.asp?partner=&zipcode=EUR|ES|SP001|GRANADA|This is the one I use most
http://www.wunderground.com/global/stations/08419.htmlThis one is in Spanish
http://www.tutiempo.net/Tiempo-Granada-E18001.htmlGuide to speaking about the weather in Spanish
http://www.lingolex.com/swom/wom-weather.htmThis is a satellite picture of Spain.
(this can often be better than looking at a forecast)
Granada is not very rainy but if there is a big swirling cloud to the left of Portugal it often means that it will rain for several days.
http://www.meteo.fr/temps/europe/satellite/bigsateuj_12.jpg