  Co$_3$Sn$_2$S$_2$ is a magnetic Weyl semimetal, in which ferromagnetic
ordering at 177K is predicted to stabilize Weyl points. We perform temperature
and spatial dependent angle--resolved photoemission spectroscopy measurements
through the Curie temperature ($T_c$), which show large band shifts and
renormalization concomitant with the onset of magnetism. We argue that
Co$_3$Sn$_2$S$_2$ evolves from a Mott ferromagnet below $T_c$ to a correlated
metallic state above $T_c$. To understand the magnetism, we derive a
tight-binding model of Co-$3d_{x^2-y^2}$ orbitals on the kagome lattice. At the
filling obtained by first-principles calculations, this model reproduces the
ferromagnetic ground state, and results in the reduction of Coulomb
interactions due to cluster effects. Using a disordered local moment
simulation, we show how this reduced Hubbard-$U$ leads to a collapse of the
bands across the magnetic transition, resulting in a correlated state which
carries associated characteristic photoemission signatures that are distinct
from those of a simple lifting of exchange splitting. The behavior of topology
across $T_c$ is discussed in the context of this description of the magnetism.
