When Do The Four Seasons Start And End ~upd~ May 2026

| Season | Meteorological Start | Meteorological End | Astronomical Start (approx) | Astronomical End (approx) | | :--- | :--- | :--- | :--- | :--- | | | March 1 | May 31 | March 20 | June 21 | | Summer | June 1 | August 31 | June 21 | September 22 | | Autumn | September 1 | November 30 | September 22 | December 21 | | Winter | December 1 | February 28/29 | December 21 | March 20 |

The astronomical dates vary because a tropical year (Earth’s orbit) is not exactly 365 days—it is roughly 365.2422 days. This is why we have leap years, which push the solstice and equinox dates by about six hours each year, causing them to land on different calendar days. Part 2: The Meteorological Seasons (The Weather Calendar) If you are a gardener, a farmer, a utility company planner, or a public health official, the astronomical seasons are frustrating. Why? Because by the time the winter solstice arrives on December 21, it has already been cold for weeks. Conversely, by the summer solstice on June 21, the hottest weather is often still a month away (due to seasonal lag). when do the four seasons start and end

The confusion is understandable. There isn't just one universal answer to the question, In fact, scientists, meteorologists, and astronomers use two very different systems to define the seasons. | Season | Meteorological Start | Meteorological End

Meteorological seasons are fixed. They always start on the same day of the same month. This makes calculating seasonal statistics (average temperature, total rainfall, heating degree days) incredibly easy. Part 3: Side-by-Side Comparison Table For a quick reference, here is how the two systems contrast for the Northern Hemisphere: The confusion is understandable

Understanding this distinction not only makes you more knowledgeable but also helps you interpret weather forecasts, climate reports, and cultural traditions with greater clarity. Now, step outside and enjoy the current season—whatever your calendar says it is.