A cloud in a dream often reflects something not yet clear -- thoughts, plans, or feelings still obscured, waiting for more information before they resolve into a clearer shape. Watching clouds part can mirror a transition toward understanding, while an unbroken overcast sky may name uncertainty that's lingered longer than you'd like.
In summer, when the Sun enters the terms of Mars, heat is caused; in winter, drought, and scarcity of rain and waters. - William Lilly (1602.-1681.)