Control weather
From Ardrana
The control weather spell enables a caster to change the weather in the local area. The spell affects the weather for up to two days in an area of several square miles. Weather conditions have three components: precipitation, temperature, and wind. The spell can change any or all of these conditions to varying degrees.
Note: This version of control weather originally appeared in the 2nd Edition Player's Handbook for Advanced Dungeons & Dragons from TSR. Its use here is for the purposes of providing context for the campaign only.