The investigation of mesons in hot medium can give valuable information about the nature of QCD vacuum and deconfinement phase transition. In this study, thermal properties of light-light pseudo tensor $\eta_{2}(1645)$, $\pi_{2}(1670)$ and $K_{2}(1770)$ mesons are examined via QCD sum rules at finite temperature. Masses and decay constants of these light unflavored mesons with $J^{P}=2^{-}$ are estimated up to dimension-five by considering the new operators emerging at finite temperature. Our numerical results manifest that after a certain point the decay constants and masses decrease significantly due to the hot medium effects. The attained results at $T=0$ and $T\neq0$ might be observed in future heavy ion collision experiments.