Hi @sundog,
Thanks so much for the information. I had naively imagined that 'real weather' includes the temperature, but this was obviously a lack of knowledge on my part. Appreciated.
Looking deeper, it is for Avalon YMAV, a smaller airport near Melbourne. The METAR X-Plane receives has some data after '//' comments with temperature which it appears unable to parse. I'll look into it further from that angle.
All the best - great product!