Two y-axis (one for Bar and one for Scatter)

Yes, you can set two y-axes, one at left and another at right.
Insert in go.Bar the corresponding axes:

trace8=go.Bar(wind at xx.00, xaxis='x1', yaxis='y2')

inside go.Layout(…)
set:

xaxis=XAxis(...), yaxis=Yaxis(...), yaxis2=YAxis('anchor'=x, overlaying='y', side='right')