Created a window with the pen tool and a little drawing tallent

Used the source from captainslack @ Flickr and put the dead desert scrub at the bottom of the window

Used the source from Julie @ flickr and created a silhouette & and reflection for the window.

Using the source from nfnitloop @ Flickr I put the green hills in the distance.

then I place the clouds I sourced from JPott
@ flickr in the top of the window.

Used the burn and dodge tools to darken the clouds and to create the shafts of sunlight turning everything green again.

There a few color, brightness and contrast layers to tweak the over all image.

Added the rain by creating a layer and flood filling it with black.
I used a very small hard brush with a pressure controlled maximum scatter, and I brushed in sheets of white dots.
Applied motion blur to the spots.
Copied the mask from the window layer and saved it, then copied the mask from the girls silhouette and reloaded the window mask combining the two and applied it to the rain layer.
I duplicated the rain layer and rotated one of the copies about 4 degrees and shrunk it about 5 percent.
Then I set the opacity on both rain layers to about 8.