I am trying to find the title and author and exact wording of a children's poem
that goes something like this:  It rained on Dan, it rained on Ann and
it rained on Arabella. It did not rain on MaryJane, she had a huge
umbrella.

It Rained

It rained on Bill,
It rained on Will,
It rained on Isabella,
But it didn't rain on ________,
He/She had a huge umbrella.

It rains on the duck, cow, and horse.
It rains on the trees and leaves, of course!
It rains on a little girl and fella.
But I'm not wet. I have an umbrella!

One spring day the big round sun
Winked at a cloud just for fun.
That dark gray cloud thundered and cried,
Scattering raindrops on all outside.
But when the sun peeked out from a sunset low
Together they both made a gay rainbow!

Source: http://www.canteach.ca/elementary/songspoems17.html
Search strategy: Google searched for "had a huge umbrella"

Sorry...to clarify...
This seems to be one of those 'rhymes' that has a hundred different
variations with no or little attribution.  I have not tried to track
down the original 17th century person who may have come up with
this...just provided the most complete lyrics I found.

A version closer to the one in the question appears under the title
"No Drops of Rain" in a collection of spring poems offered as a
resource for teachers.  No author is identified.

http://www.icteachers.co.uk/resources/literacy/spring_poems.rtf