New map, I think I am done playing now
I have 30 arc second topo that I could use as the background, but to be honest it isn't going to prove much - the BOM doesn't, generally speaking, stick their climate stations on the tops of mountains. They are mostly in the middle of populated areas, so we lack real data for the hills.
For those who are curious, that spot with 169.8 clear days on the central coast of NSW is Harrington, 31.87 °S 152.68 °E, on the coast near Taree.
I've also included the data for Coonabarabran, for those interested.