  We study hadronic correlation functions in the interacting instanton liquid
model, both at zero and nonzero temperature $T$. At zero $T$ we investigate the
dependence of the correlators on the instanton ensemble, in particular the
effect of the fermionic determinant. We demonstrate that quark-induced
correlations between instantons are important, especially in the repulsive
$\eta'$ and $\delta$-meson channels. We also calculate a large number of
mesonic and baryonic correlation functions as a function of temperature. We
find three different types of behavior as $T\to T_c$. The vector channels
$\rho,a_1,\Delta$ show a gradual melting of the resonance contribution and
approach free quark behavior near the chiral phase transition. The light
pseudoscalars and scalars $\pi,\sigma$, as well as the nucleon show stable
resonance contributions, probably even surviving above $T_c$. Correlation
functions in the heavy scalar channels $\eta',\delta$ are enhanced as $T\to
T_c$.
