It has been a cool start to spring for Sydney, however temperatures will heat-up this week.
The morning temperatures were particularly chilly in Sydney for the start of the season, dipping to five degrees yesterday and seven this morning. This has been Sydney's coldest pair of September mornings in 17 years.
These cold mornings are the result of clear skies and light winds that have followed in the wake of a cold front that passed through on Friday. The cool airmass that has lingered through the weekend also kept the daytime temperature slightly below normal yesterday, only reaching a top of 18 degrees, which is five below the September average.
The high pressure system that is maintaining the clear skies today will slip into the Tasman Sea during the next few days and will direct warmer north to northwest winds into Sydney. These northwest winds will draw a warmer airmass from the nation's interior right into New South Wales.
Sydney's warmest day will occur on Wednesday with an expected top of 26 degrees in the city, while western suburbs climb into the high twenties.
Keeping with the trend we have seen for the past few weeks, another front will bring an end to the warmth late in the week. This front is not expected to bring any rainfall and should only drop temperatures back to around 20 degrees during next week.
© Weatherzone 2012
09:08 EST An unseasonal low which has crossed the north-west of the state during the dry season has dumped heavy rain on parts of the Kimberley and Pilbara.