This graph compares and is sourced to:

• Cape Naturaliste data used by the Goddard Instutute for Space Studies (GISS) at NASA to calculate global temperatures
• High Quality data for Cape Naturaliste since 1910 from the Bureau of Meteorology

All data has been homogenised and adjusted by authorities to account for artificial factors such as changes in site location, exposure, instrumentation or observation procedures, particularly the High Quality BoM data since 1910 (... more).

Similar graphs are available for Albany, Bridgetown, Broome, Busselton, Cape Leeuwin, Carnarvon, Derby, Donnybrook, Esperance, Eucla, Eyre, Geraldton, Halls Creek, Kalgoorlie, Katanning, Kellerberrin, Marble Bar, Merredin, Perth, Rottnest Island, Southern Cross, Wandering and York.

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