We get approximately 3 months of warm "summer" weather where I live. I love the outdoors and nature in general, so one of the first things I did when I moved into my house was plant a garden in the backyard, full of plants and flowers that attract butterflies and hummingbirds. Seeing the world essentially come to life with the onset of summer is one of my absolute favorite things, and I frequently sit on my back porch and watch these beautiful creatures flock to my garden. That said, here's my submission:
I decided to make an agrias butterfly. To me, butterflies are synonymous with summer and sunny weather and symbolize my favorite time of year. The agrias is my favorite of all the butterflies from the Animal Crossing series, and have the most "summery" colors in my opinion.