It's been a hot start to December for Adelaide, with further heat on its way middle of this working week. Starting off the month with a 33 degree day, December was already off to a hot one in Adelaide. Although temperatures took a tumble over the following day or two, it didn't take long for summer to show its face again. With heat building each day from Monday 3rd, the mercury nudged into the 30's by Wednesday 5th, climbing to a scorching 39.6 degrees by Friday 7th at the West Terrace site. Temperatures are currently much cooler than that now, with Adelaide expected to peak in the high 20's on Sunday and Monday this week. Those 30 plus degree days aren't far away again however with a low pressure trough funneling heat from the interior down towards Adelaide on Tuesday. The mercury is expected to peak back in the mid 30's on Tuesday, hovering in the low 30's on Wednesday. Should these temperatures materialise, it would mean six of the first 12 days of summer peaked above 35 degrees. Comparatively, last year didn't reach 30 until the 12th day itself. For those who prefer the colder conditions, relief is in sight, with a run of cooler days expected from about Thursday this week.