Temperatures in summer are warm to very warm , with average maxima ranging from 28 ° C ( 82 ° F ) around Canberra and Queanbeyan to 22 ° C ( 71 ° F ) on the highest parts of the plateau .
The average maximum temperatures range from 28 ° C ( 82 ° F ) around Canberra and Queanbeyan to 22 ° C ( 72 ° F ) on the highest parts of the plateau .