This site gives a very comprehensive explanation of the ways to describe the weather in Spanish (when to use the verbs hacer, haber, estar, etc.). It also has links on the left to interactive self-check activities.
Try this study module at Colby University's website. Listen to a popular song about the environment by the Mexican group Mana. Learn about the band,the song, the issue AND practice the future tense.
EXTRA practice for U5-2 vocabulary