Depending on where this review was left, here’s what likely makes it notable:
That is an interesting phrasing for a review, because "average weather in Australia by month" isn't a product or a destination—it's a search query or a data table.
The reviewer may be pointing out that "average weather in Australia by month" is misleading, since Australia is a continent with tropical north (monsoon, wet/dry seasons), desert interior (hot days, cold nights), temperate south (four seasons, cool winters), and Mediterranean southwest. A single "average" for the whole country by month is nearly useless—e.g., "average June" could mean 22°C and dry in Darwin but 12°C and rainy in Melbourne.
Likely complaining that the information was too generalized or incorrect—e.g., "This says average February temp is 29°C, but in Tasmania it was 18°C."
Could be a dry joke: "Great—now I know it's hot in January somewhere down under, thanks."
They might be sarcastically noting that the item promised monthly weather averages but failed to break down by region, making it unhelpful for trip planning.