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The Southern Hemisphere's spring equinox, when day and night are equal. Indigenous Australian Seasons
Overall, while the exact date of the start of spring in Australia may vary slightly from year to year, it generally falls around September 22 or 23, with September 1 being used as a practical definition for meteorological purposes. when does spring start in australia
This follows the , which group months by temperature patterns and align with the calendar. Unlike the US or Europe, Australia does not use the astronomical equinox (around September 22–23) to mark the start of spring. The Southern Hemisphere's spring equinox, when day and
In Australia , spring officially starts on . Unlike the Northern Hemisphere, where seasons are often defined by the astronomical equinoxes (roughly the 21st or 22nd of the month), Australia follows a meteorological seasonal system . This means every season starts on the first day of the respective month, with spring spanning exactly three months: September, October, and November . The Two Ways to Define Spring in Australia Definition Type Start Date Meteorological (Official) September 1 Grouping calendar months for easier statistical comparison. Astronomical September 22 or 23 Unlike the US or Europe, Australia does not
. This means each season begins on the first day of the calendar month and lasts for exactly three months: Spring: September 1 – November 30 Summer: December 1 – February 28/29 Autumn: March 1 – May 31 Winter: June 1 – August 31 Why the Different Date? The Bureau of Meteorology (BOM) uses this system because it aligns more closely with Australia’s actual temperature cycles. It also makes record-keeping much simpler; comparing monthly climate data is easier when the seasons don't shift by a day or two every year due to leap years or Earth's elliptical orbit. Astronomical Spring vs. Meteorological Spring Even though the calendar says September 1st, astronomers still track the
In Australia, and ends on November 30.