You're asking a very complicated question there. In aviation, weather is a factor almost always. You learn more about the weather than you care to know if you ever get your pilot license, but a good portion of it is very useful.
There are so many different areas to learn about: Cloud types, icing, barometric pressures, isobars, dewpoint-temperature spreads, fogs, winds, and that is just the beginning.
If you are very interested in it, I know there are very helpful tools out there such as videos or interactive CD
's for the computer that can help you learn all about it. King Schools offers some good ones. Hope this helped.
[Edited 2003-11-07 14:16:25]
[Edited 2003-11-07 14:17:07]
[Edited 2003-11-07 14:19:49]