It is possible to get the RH forecast with the RH map, of course. The picker shows the prediction and @kevg1999 is not right when he says:

@kevg1999 said in Please add more relative humidity information:

the app has humidity readings but its only in real time and doesn’t display RH predictions for the day.

It’s not only real time readings, it just needs to move the time slider to get the RH predictions.