Autumn Equinox 2024 Uk. After a suprise september heatwave in the uk, when temperatures rose as high as 33.5c, autumn has now officially set in. The sun entries into the 4 cardinal.
The autumnal equinox occurs in september, and in the northern hemisphere this date marks the end of summer and beginning of autumn. According to the meteorological calendar, the first autumn day is friday 1st september 2024.