Weather is probably a major factor when you plan your trip to Newtown, but bear in mind that cheaper options are usually available when the weather isn't as good. The hottest months are usually September and October, with an average temperature of 27°C, while the coldest months are January and February, with an average of 26°C. The rainiest months in Newtown are October, November, August and July, with each month seeing an average of 209 mm of rainfall.