Monthly statistics are only included if there are more than 10 years of data. The number of years (provided in the 2nd last column of the table) may differ between elements if the observing program at the site changed. More detailed data for individual sites can be obtained by contacting the Bureau. This page URL: http://www.bom.gov.au/climate/averages/tables/cw_005007.shtml.
piffle (third-person singular simple present piffles, present participle piffling, simple past and past participle piffled) To act or speak in a futile, ineffective, or nonsensical manner. To waste, to fritter away.
muffle â(third-person singular simple present muffles, present participle muffling, simple past and past participle muffled) ( 1 transitive) To wrap (a person, face etc.) in fabric or another covering, for warmth or protection; often with up.  Addison.