Seasons In Usa Dates

While most of us celebrate the "official" start of a season on the 20th or 21st of a month, weather experts use the 1st of the month to keep data clean and simple.

Here are the official with their typical dates in the USA (based on UTC timing; dates can shift by a day depending on the year):

These are defined by Earth’s 23.5-degree tilt and its position relative to the sun. seasons in usa dates

| Season | Start Date | End Date | |--------|------------|----------| | | March 19–21 (Vernal Equinox) | June 20–21 (Summer Solstice) | | Summer | June 20–21 (Summer Solstice) | September 22–23 (Autumnal Equinox) | | Fall (Autumn) | September 22–23 (Autumnal Equinox) | December 21–22 (Winter Solstice) | | Winter | December 21–22 (Winter Solstice) | March 19–21 (Vernal Equinox) |

There are two ways to define the start and end dates of the seasons: astronomical and meteorological. While most of us celebrate the "official" start

Understanding the "seasons in usa dates" requires looking at two different systems: the (nature's cycle) and the meteorological (the calendar).

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 Understanding the "seasons in usa dates" requires looking

The moment the sun crosses the celestial equator. Day and night are nearly equal in length.

Meteorologists and climatologists group the seasons into three-month blocks based on the annual temperature cycle. Meteorological Versus Astronomical Seasons | News

Because a year isn't exactly 365 days (it's 365.24), these dates shift slightly every year. 2. Meteorological Seasons