Quarkonia at $T>0$ and lattice QCD

We report here on recent progress in the determination of S-wave and P-wave heavy-quarkonium states at finite temperature. Our results are based on the combination of effective field theories with numerical lattice QCD simulations. These non-perturbative tools allow us to compute the heavy-quarkonium in-medium spectral functions, from which we in turn determine the melting temperatures of individual states and estimate phenomenologically relevant observables, such as the ${\psi }^{\mathrm{\prime }}$ to J/$\psi$ ratio in heavy-ion collisions.