One day down, four to go. Yesterday Adelaide reached 27 degrees and is forecast to reach 29 degrees (10 degrees above the May average) today and at least 25 degrees from Thursday to Saturday. Five consecutive days of 25 degrees or warmer - the first time in 92 years Adelaide has been this warm this late in autumn. In 1921 there were six consecutive 25-degree days, from 13th May to 18th May. Also, if Adelaide reaches 29.3 degrees on Wednesday, it will be the warmest May day in 92 years. The May record is 32.3 degrees, set in 1921. Warm and dry northerly winds will persist across South Australia until a rain and a cooler change arrive this weekend. Northerlies will become gusty each day, increasing fire danger, particularly in the west. Fire Weather Warnings have been issued. A low pressure trough will bring rain to SA this weekend. The trough is currently forming over Western Australia, where it will generate damaging wind, rain, thunderstorms and waves. By the time this system reaches SA it will lose oomph but still bring the most widespread decent rain since last winter, 10-to-20mm for southern agricultural areas. Grain farmers have been preparing to sow their winter crops and should find this rain very useful. Gardeners in and around Adelaide will also welcome it. Adelaide has had its driest 12 months in four years and it’s catchment is at about 41% capacity, the lowest level in five years. This rain and subsequent cooler, gusty wind change will bring an end to what has been an unseasonably warm start to the year. From Sunday jumpers and coats will take over from t-shirts until spring arrives.