meteorogical data (DB temp, WB temp etc...)

Hi all, i did not know in with subforum write this question so i post it here :)

I need to get meteorological data from past 30 yrs, or the best would be to get typical meteorological year for locations all over the world to put it in my computer program.

Does any one know if there is an organization that has such data to download or to buy?

Thank you in advance,
Marcin Kroczek