[zaroth]

85 cases in Australia. And how many of those are imported?

In a binary sense, yes it “is spreading”. Even an R0 of 0.1 is “spreading”. But there is hardly enough data to say it is spreading widely in Australia.

The virus spread in summer/tropical vs winter/non-tropical regions is orders of magnitude different. But this is also not definitively causal. Just extremely highly correlated.

[8ytecoder]

Yup, the counter to it is India. With almost all of the 43 cases imported even after more than 17000 tests seem to indicate that it's not spreading there (it could be a variety of factors including under-testing).