Perth has just had its coldest day in two years, and is having its longest run of days below 17 degrees in 51 years, according to weatherzone.com.au. Cloud and rain today kept the city from warming past 13 degrees, five below the July average maximum, making it the coldest day since June 2009. Perth has now failed to warm to 17 degrees in each of the last 10 days, the longest run this cold since the winter of 1960, when there were also 10 days. It was slightly colder during the 1960 run, with maximums averaging 15.1 degrees, compared to 15.5 this time around. 1938 was the last time there was a longer run as cold as the current one, 12 days. The record is 16 days, way back in 1908. The current chilly run is about to end with help from clearing skies. From Tuesday, sunshine will combine with warmer northeasterly winds, giving Perth and much of the west coast their best chance to warm to their average maximum for the first time this month. Geraldton will also get there, hitting 20 on Tuesday or Wednesday for the first time since June. This will be a relief for those who have struggled to stay warm. Today, it only reached nine degrees in Bickley, Hyden and Newdegate.