Autumn 2025 Months And. Starts on thursday, june 20 at 4:51 pm, and ends on september 22 at 8:44 am. When is it autumn in ireland;

Irish homeowners are advised to close their windows during autumn months.  — autumn is usually defined in the northern hemisphere as the period between the autumnal equinox (day and night equal in length), september 22 or 23, and the winter solstice (year’s shortest day), december 21 or 22;