When travelling, it's generally smart to pack in preparation for rain or any other conditions that may arise. The rainfall in Newman is roughly similar to Paraburdoo. You can assume this to be the case over the next 2 days.
Expect the weather to be around 39 °C on average in December. As the temperature peaks, try to get your plans done early, as flight price and availability will have an impact on your travels. The climate in Paraburdoo is generally the same as in Newman.