 On these occasions, Sydney can experience the fury of the desert climate, although they are often ended with a Southerly Buster, which is a windy, shallow cold front that sweeps up from the southeast abruptly cooling the temperature.At times, it may be accompanied by a thunderstorm and drizzle, and it may keep the temperatures cool the following few days as well.In the Sydney central business district, an average of 15 days a year have temperatures of more than and 3 days with temperatures over .