Yes! I think exactly the same thing as you! Her albums and songs definetly remind me of seasons.
For me, Harmonium, starts at the end of summer (White Houses), goes through the fall, starts to turn to winter (Afterglow, Half a Week Before The Winter), and ends at the beginning of winter. There are so many references in the lyrics to seasons and seasons changing on that album. It just fits with that time of the year.
Heroes & Thieves is an end of winter/beginning of spring album to me, too.
Rabbits on The Run, to me, sounded like it would be a perfect spring album. But she's releasing it in the summer, so... maybe it will sort of start in spring, and end at the beginning of summer.
I love how Vanessa does that too. Her songs seem like a soundtrack to a certain time of year.