Rains in their proper seasons is the most important Beracha

 Ramban (Vayikra 26:04) He mentioned the matter of rains first of all the blessings because if they come in their proper season, the air is pure and good and the springs and rivers are clear, and thus it the rain is a prime cause of physical health, and all produce will increase and be blessed by it, just as He said, and the Land shall yield her produce, and the trees of the field shall yield their fruit. Thus because of this pure state of the environment people do not become sick, and none shall miscarry, nor be barren, even among their cattle, and they will live out the full extent of their days. For when the material frame of human beings is large and healthy, they can continue in health as in the days of Adam. Thus this blessing — the rains in their seasons is the greatest of all blessings and therefore it is given first place.