Agree with above post and more info from Washington State: The spring months through May can be pretty wet. June is cloudy but it doesn't rain as much. After the 4th of July, the weather stays sunny and warm through the end of September. The best pas...
We spent a week near Trout Lake, WA last year, which is not so far from Ainsworth SP. We had fun exploring the roads around Mt. Adams. Lots of fun day hikes, too.
