In the United States , the changing of seasons is tracked in two ways: (based on Earth's tilt and position relative to the sun) and meteorological (based on the annual temperature cycle and the calendar). Seasonal Dates for 2026 Astronomical Start (Equinox/Solstice) Meteorological Range Spring March 20, 2026 March 1 – May 31 Summer June 21, 2026 June 1 – August 31 Fall September 22, 2026 September 1 – November 30 Winter December 21, 2026 December 1 – February 28 The Four Phases of the Year Meteorological Versus Astronomical Seasons | News