What does summer mean to the speaker in "A Letter Sent to Summer"?

Summer, to the speaker, means a return of natural
pleasantness, as shown in the friendly “baskets of flowers” that summer leaves, just
“like an old friend.” The bugs and monsoons, in addition to plums and the rose, show
that the speaker’s views are balanced, and that she recognizes summer’s negative as well
as positive aspects. Despite these, warm weather and summer provide the incentive for
the speaker toward action, unlike winter, which causes her to “curl back into … [her]
blizzard of linens” (line 19). This is in contrast to the phrase “always snowing” which
suggests an admission that the speaker’s moods correspond to the seasons. She admits to
a permanent degree of lassitude or even depression (she says “it is always snowing”
inside her head), particularly in winter, but she states that the sights and flora of
summer lessen this feeling.