[DB]

Is that unusual and if so, how unusual?

[BlackVeil]

It is certainly unusual, but the article gives no specific statistics about how often this might be expected to happen. They only quote one witness, and don't get an opinion from the weather experts (who are often pretty useless anyway.)

Mr Byrne contacted ABC Local Radio late this morning while hiking up Bluff Knoll to report snow continuing to fall thick and fast.

The ABC is putting out this story partly for interest, but also because there is some concern for visitors going bush walking, not prepared for such extreme and unseasonable conditions.