Can you control the weather with magic? Or is this only something God has power over?
The Talmud records the following statement in Taanit 2a:
אמר ר' יוחנן ג' מפתחות בידו של הקב"ה שלא נמסרו ביד שליח ואלו הן מפתח של גשמים ומפתח של חיה ומפתח של תחיית המתים
R. Johanan said: Three keys the Holy One blessed be He has retained in His own hands and not entrusted to the hand of any messenger, namely, the Key of Rain, the Key of Childbirth, and the Key of the Revival of the Dead. (Soncino translation)
The simple reading of this might imply that no one and nothing other than God Himself has the power to control rain. However, it can be read in ways which are less restrictive, as Rashi and Tosafot there show, partially based on the parallel passage in Sanhedrin 113a. Rashi assumes that it means only that no one other than God will have all three of the keys; Tosafot assumes that it means that no one other than God will have any of the keys at all times.