It has been a cool start to Spring for the Upper Western, but this week will see warmth spreading across the region. The chilly start to the season has been caused by active fronts bringing colder air well north over mainland Australia, accompanied by fairly cloudy skies. Although we are still only in early-September, the running maximum temperatures for Bourke and Wilcannia are currently around three degrees below average. This week will see the maximum temperature consistently reaching the high-20's or low-30's, as fronts stay much further south and warm air filters in from northern Australia. Unfortunately, this means that there will be no significant rainfall for the region this week. The warmth will not be confined just to the northwest of NSW, but will briefly reach Sydney on Wednesday, when the mercury also looks to peak in the high-20's.