Australia is a big country. Here's a map of Australia overlaid over one of India. We have at least five different climate zones: here's one map of that.
What this means is different regions of Australia typically get different weather in various parts of the year, and there's not a month that's "(mostly) dry" for all of Australia. i'm a Melbournian, and Melbourne is notorious for the changeability of its weather, both on a given day ("four seasons in one day") and more generally. Some years out October/November can be quite dry, other years they can be quite wet. Rainfall averages don't necessarily reflect this variation.
At the moment, Australia is experiencing its third year in a row of La Niña, which tends to result in more rain than usual. It's not typical for La Niña to go for three years. Additionally, t