Adelaide has remained at least seven degrees cooler than average for the past six day's, which is a February feat not seen before since at least 1977. From Sunday 5th February to Friday 10th, Adelaide failed to climb above 22.5 degrees, well below the long term February average of 29.4. The unusually cool conditions are the result of a persistent flow of southerly air over the city during the past week and lingering cloud cover, which has restricted solar heating from the sun. The city only managed to reach 20 degrees on Friday, nine degrees cooler than usual and the coldest February day in seven years. Adelaide's run of cool days is expected to end next week, when temperatures return to more familiar territory. The city can expect to reach the high 20's by the end of the weekend and from Tuesday the mercury is set to climb into the 30s for the first time in 11 days. Looking ahead, a weak change will affect Adelaide in the middle of next week, although temperatures are unlikely to stay as low as they have over the past six days.