"Autumn begins when the days are again of equal length and when the sun moves into Libra. It is a time to plan for winter. To weigh and balance the wherewithal to survive," the site Trans4Mind noted. Libra, Scorpio, and Sagittarius are the signs that move us through the fall in preparation for winter.
"Over the next few months the plants begin to die. The leaves are on the ground, and the trees are bare. In Scorpio, ideas of life and death are most pronounced as the year's life is given up and new life is concentrated into seeds for the next year," Trans4Mind continued. Finally, Sagittarius wraps up fall and moves us into winter. "With the arrival of Sagittarius, the life energy is dispersed and the autumn gradually changes to winter. Some days are like autumn, on other days the ground is covered by snow." These three signs work together to create a season, and they'll be most affected by the 2019 fall equinox on Sept. 23.