This paper establishes patterns of influence of ambient humidity on the piezoelectric strain coefficient and the magnitude of the current generated by nitrogen-doped carbon nanotubes (N-CNTs) during their deformation. It is shown  that at humidity up to 60%, stable current generation is observed during the deformation of N-CNTs; at higher humidity, the instability of measurements increases and the spread of the generated current grows significantly, which is  associated with a decrease in the N-CNTs piezoelectric strain coefficient.