Aguardar como aqua de mayo

[poli]

Does this mean to hold precious, or to hold sacred?

[Rusty]

como agua de mayo = just what is needed, very welcomed (because it was eagerly awaited), spring showers

venir como agua de mayo = to be just what the doctor ordered, to be a godsend, to be just what was needed

[CrOtALiTo]

The word aguadar is merely a usages in my country.

[AngelicaDeAlquezar]

I agree with Rusty.

"Aguardar como agua de mayo" is to expect something very eagerly.

[sosia]

Agree, is expect something very eagerly, is waiting like the farmers do for the spring showers
A common one
"Espero mi nómina como agua de mayo, que tengo que comprar muchas cosas"
Saludos :D