Unfortunately there is no plotyyy, nor is there a more-than-2 version of plotyy's succesor yyaxis.
You can kind of fake it on recent releases (I think this will work beginning in R2020b, but tested it in R2021a) with tiledlayout:
load('giulia_year')
x=giulia_year.DateA;
y1=giulia_year.Diff_Values;
y2=giulia_year.year_values_wind;
y3=giulia_year.year_values_hum;
ylabels{1}='mm w.e.';
ylabels{2}='knt';
ylabels{3}='%';
%%
t=tiledlayout(1,1,'TileSpacing','tight');
ax=axes(t);
yyaxis left
plot(x,y1)
ylabel(ylabels{1})
yyaxis right
plot(x,y2)
ylabel(ylabels{2})
% Use a second axes
ax2=axes(t);
h=plot(ax2,x,y3,'SeriesIndex',3);
ax2.Visible='off';
% Now use a third axes for the y axis for the third plot
% Put it in the west tile, and use a DataAspectRatio that
% makes it narrow
ax2_axis=axes(t);
ax2_axis.Layout.Tile='west';
ax2_axis.YColor=h.Color;
ax2_axis.DataAspectRatio=[1 eps 1];
% This tries to link up axes limits. Interactively panning the
% axes might not work work exactly as expected...(but not horrible
% either)
linkaxes([ax2 ax2_axis],'y')
linkaxes([ax ax2],'x')
ylabel(ylabels{3})
