Caution: Reliable weather measurements require certain standards for both the instruments used and their siting and maintenance. The Weather Underground stations do not generally meet the stringent requirements of BoM stations and therefore provide variable accuracy. Nevertheless they can provide a useful guide to our local weather conditions that may be more accurate than those from the BoM Canberra Airport station because they represent local conditions rather than those at the airport.
When taken together they may provide a better guide than any one Weather Underground station by itself. The consistency of the temperature across all the sites at the time the map above was captured gives confidence that the temperature was close to 18 degrees near The Pinnacle. The variation in the wind direction could be real or could be related to the accuracy of the instruments varying between sites.
Note that the map above reflects the default settings (showing temperature and wind direction at each site) when you first open it. There are options to select rainfall or humidity instead, but note that the rainfall shown on the map is in cm not in mm, although it is in mm when you look at individual sites.