Adelaide's temperature fell drastically into Thursday and today its staying down under cloud and showers. South Australia's capital enjoyed its warmest start to spring on record, reaching or exceeding 28 degrees on the first four days of the month. Then the weather seemed to remember it was the start of spring. The arrival of a trough late on Wednesday afternoon brought in a cooler change with lots of cloud. Today is the second day that should only reach 16 degrees, three below the September average. Most people would consider this a miserable way to end the working week, especially after the startling sunny skies of earlier days. Sunshine will return at times on Saturday as a high pressure ridge begins to clear the skies. However, cloud will increase again ahead of a low pressure system on Sunday, leading to a humid day. Once the low moves through on Monday cool temperatures in the mid to high teens will take over for much of next week. The low should only bring a few showers early in the week. The warmth similar to that of the start of the month should stay away until at least Tuesday 17th, when it should only come on one or two days of that week.