Perth experienced a sweltering day, with the hottest October weather in nearly two decades. Perth residents woke up to its warmest morning so far this month, only dropping to 18 degrees, seven degrees hotter than the October average. This was a sign of what was to come. Shortly after lunch, the city reached 37 degrees as the northeasterly winds dragged in the dry inland heat into the city. This is the hottest October day that Perthians have experienced in at least 18 years, making it feel more like early April. Slight relief from the heat came with the arrival of cooler westerly winds, moving through Perth early this afternoon. This caused the temperature to drop a degree or two. There will be some reprieve tomorrow, with daytime temperatures tipped to be around ten degrees cooler. This is due to a front passing to the south of the state bringing clouds and fresh southerlies in its wake. However, cooler weather will not hang around for long, with the mercury rising again on Friday. By the weekend, Perth should see mostly sunny conditions and set to reach at least 30 degrees on both days.