The thunderstorm reason usually passes by the Palouse region a bit before the summer seasons. During the summer, one is typically greeted by bluebird skies over the rolling green fields. However, that is not particularly conducive to photography.
I wasn't hoping to get great weather in a trip earlier this year, but I was a bit more lucky with the weather patterns. Even though it was late June, cumulus clouds continued to roll over the region, an aftermath of a wet weather pattern. That lead to a nice pattern of shadow and light over lush wheat fields.
Palouse
WA USA