My guess is that, were summer given a pen, her to-the-point message to fall, winter, and spring would be:
"Y'all can suck it!"
Gazing at the pixels appended here (if you aren't already out recreating) might make a strong argument for that assertion.
Mountains, Milky Way, shooting star. and aurora--FTW!
Get out there, now, before the flowers are gone and the creeks have all dried up.