Sydneysiders sweltered through another belter on Sunday, with temperatures soaring above 40 degrees across much of the city.

Temperatures in the city reached 34.9 degrees at 12.40pm at Observatory Hill on Sunday, falling just shy of setting a new record of 10 days above 35 degrees in a season.

With 35 degrees tipped for Monday, the city has another shot at breaking a record that has stood since the summer of 1895-96.

Weather stations at Sydney Olympic Park, Camden, Richmond, Holsworthy and Canterbury all recorded temperatures surpassing 40 degrees on Sunday afternoon. Bankstown's 42.7 degrees was the city's hottest.