Atlas Climático Digital de la Península Ibérica

The ultimate answer for all those "what's the weather going to be like" questions, set up by a team at the Autonomous University of Barcelona. Displays maps of min/max/mean temps and precipitation, either annual or per month. Supposedly to 200m squares, so you can zoom in, tho this is not as useful as it sounds, as they don't provide an overlay of towns, so it's hard to relate the climatic data to actual places. (There's also solar radiation, tho I suspect this means little to most non-specialists.)
As it says on the tin, Península Ibérica, so covers Portugal as well as Spain.

http://opengis.uab.es/wms/iberia/mms/index.htm and there's some explanatory text in English at http://www.opengis.uab.es/wms/iberia/en_index.htm

The info is also available as a web service, so I was planning on overlaying it with my map of routes, and perhaps the METAR data from weather stations. However, there are several snags, not least that the server does not seem to include the colour key. Perhaps I will return to this next year . . . mañana . . . mañana

I have now got around to adapting this. The plain map is at http://maps.peterrobins.co.uk/clima.html and I've also overlaid my route lines on the climate maps at http://maps.peterrobins.co.uk/clima/routes.html. On the latter, I've also included the towns I use for my overview lines to make it easier to relate the colours to actual places on the ground. In both cases, you can choose rainfall or temperature and either annual or the monthly figures (tho some of these, such as annual average temps, are probably not that useful).

If you want more details for a particular place, you're better off using the original in Barcelona, as you can click anywhere on their map and get info for the nearest recording station.

So, will that put an end to the numerous "what's the weather going to be like" questions??