FSRealwx?

I was directed here by someone who told me this was a great freeware add-on for FSX weather. I hate to sound dense but what do I need to download to get real world weather for FSX? I want to make sure to get the proper file the first time. Sorry for the silly question but was unsure about what to get. All I'm really after is decent weather for flying. Decent as in real weather not sunny and 70's in Alaska when the weather is really in the 20's. In my area of the states according to FSX weather we've been having thunderstorms for about 8 months now. News to me! Thanks for helping and I like the looks of your program from the website at least! Oh and does it impact framerates anymore than the default weather? Thanks again!

fsrealwx lite setup.zip in downloads section

Thank you very much! Got it and it seems great!