National Weather Modification Policy Act - Establishes, within the Environmental Protection Agency, an Office of National Weather Modification Policy. Provides that such Office shall develop and promulgate a national policy for all weather modification activities by departments and agencies of the Federal Government. Requires such Office to observe and require reports on such activities. Requires such Office to make such recommendations to the President and the Congress as are necessary to further implement such national policy.

Authorizes the appropriation of such amounts as are necessary for the purposes of this Act.