  We generalise a number of classical results from the theory of KMS states to
KMS weights in the setting of $C^{*}$-dynamical systems arising from a
continuous groupoid homomorphism $c:\mathcal{G} \to \mathbb{R}$ on a locally
compact second countable Hausdorff \'etale groupoid $\mathcal{G}$. In
particular, we generalise Neshveyev's Theorem to KMS weights.
