IDS21007 Australian Government Bureau of Meteorology South Australia Frost Warning for the Upper South East and Lower South East forecast districts. Issued at 10:22 pm CST on Monday 21 September 2026. ================================================================================ Please be aware Temperatures at ground level can be many degrees lower than those recorded by standard weather stations, especially in calm conditions with clear skies. ================================================================================ Frosts with temperatures down to 0 degrees are forecast for Tuesday morning in parts of the Upper South East and Lower South East forecast districts. No further warnings will be issued for this event.