  We study the main properties of the warm inflationary model based on Barrow's
solution for the scale factor of the universe. Within this framework we
calculate analytically the basic slow roll parameters for different versions of
warm inflation. We test the performance of this inflationary scenario against
the latest observational data and we verify that the predicted spectral index
and the tensor-to-scalar fluctuation ratio are in excellent agreement with
those of {\it Planck 2015}. Finally, we find that the current predictions are
consistent with those of viable inflationary models.
