  The purpose of this paper is to obtain atomic decomposition characterization
of the weighted local Hardy space $h_{\omega}^{p}(\mathbb {R}^{n})$ with
$\omega\in A_{\infty}(\mathbb {R}^{n})$. We apply the discrete version of
Calder\'on's identity and the weighted Littlewood--Paley--Stein theory to prove
that $h_{\omega}^{p}(\mathbb {R}^{n})$ coincides with the
weighted$\text{-}(p,q,s)$ atomic local Hardy space
$h_{\omega,atom}^{p,q,s}(\mathbb {R}^{n})$ for $0<p<\infty$. The atomic
decomposition theorems in our paper improve the previous atomic decomposition
results of local weighted Hardy spaces in the literature. As applications, we
derive the boundedness of inhomogeneous Calder\'on--Zygmund singular integrals
and local fractional integrals on weighted local Hardy spaces.
