  We derive thermal QCD sum rules for the correlation function of two vector
currents in the rho-meson channel. It takes into account the leading
non-perturbative corrections from the additional operators, which appear due to
the breakdown of Lorentz invariance at finite temperature. The mixing of the
new operators has a drastic effect on their coefficients. The thermal average
of all the operators can be related to that of the quark condensate and the
energy density. The sum rules then yield the temperature dependence of the
parameters of the $\rho$-meson, namely its mass and coupling to the vector
current. Our result is that these parameters are practically independent of
temperature at least up to a temperature of 125 MeV.
