Early on in my Buddhist practice, I wrote that behind the clouds, the sky was always blue and the sun was always shining. The lesson here was that regardless what is going on at the moment, your true Buddha nature within you, your divinity, is constant.
The other morning when I was driving to work on an overcast day, I suddenly realized that even on grey days, the suns rays are always with us. Without the sun, a grey day would be darkness, like at night. So even on a grey day, we benefit from the sun even if we don't see the sun shining directly; we still see its light.
So the source of life on earth, be it animal or vegetable, is never absent. Sometimes it is filtered by the clouds, but that is also part of the universe's structured ecosystem for maintaining life on earth.
The earth needs grey days as well as sunny ones; if it was constantly sunny, the earth would be a desert, nothing would grow, there would be no water. At one phase of the earth's development, millions of years ago, the earth was totally dry and there was no life. Then for millennia, the Earth was enveloped in clouds and it rained constantly, creating the oceans, lakes, rivers, and ground water.
So next time you get in a funk about the "bad" weather, remember that while it may be "bad" from your ego-mind's perspective, it plays its necessary part as an element of the earth's ecosystem that maintains life on earth, including yours. It is all meant to be. And so to, your true Buddha nature, the child of the universe within you, is always there, a constant source of positive energy and joy. You have but to access it.