  The behavior of $\pi^0$ meson properties in the presence of a uniform
external magnetic field is studied in the context of a nonlocal extension of
the Polyakov-Nambu-Jona-Lasinio model. The analysis includes the $\pi^0$ mass,
the effective $\pi^0$-quark coupling and the pion-to-vacuum hadronic form
factors, both at zero and finite temperature. Numerical results are compared
with previous calculations carried out within the local NJL model, when
available. The validity of chiral relations and the features of deconfinement
and chiral symmetry restoration transitions are discussed.
