This work investigates nonlocal in uences on magnetization dynamics based on an analytical description. Stochastic magnetic fields are incorporated, which are characterized by a finite correlation time. Taking correlations into account fluctuations lead to the observation of undamped spin waves. Furthermore, the equation of motion is generalized by means of a deterministic retardation function. This includes both temporal memory effects and spatial correlations. The theoretical results are compared to ferromagnetic resonance measurements and agree well with the experiment within the small and intermediate frequency range. For large frequencies a new behavior is predicted. In addition, the in uence of nonuniform temperature gradients on magnetization dynamics is analyzed. The results show that the lifetime of the magnetic excitations depends significantly on the imposed boundary conditions and temperature profiles.