were set to give the ACT an adequate water supply. The ACT extends about North-South between 35.124°S and 35.921°S, and West-East between 148.763°E and 149.399°E. The city area of Canberra occupies the north-eastern corner of this area. The Australian Capital Territory includes the city of Canberra and some other townships such as Williamsdale, Naas, Uriarra, Tharwa and Hall. The Australian Capital Territory also contains agricultural land (sheep, dairy cattle, vineyards and small amounts of crops) and a large area of national park (Namadgi National Park), much of it mountainous and forested. Tidbinbilla is a locality to the south-west of Canberra that features the Tidbinbilla Nature Reserve and the Canberra Deep Space Communication Complex, operated by the United States' National Aeronautics and Space Administration (NASA) as part of its Deep Space Network. The Southern Tablelands Temperate Grassland straddles the state. There are a large range of mountains, rivers and creeks throughout the territory and are largely contained within the Namadgi National Park. These include the Naas and Murrumbidgee Rivers. Climate The territory has a relatively dry, continental climate experiencing warm to hot summers and cool to cold winters. Under Köppen-Geiger classification, the territory has an oceanic climate (Cfb). January is the hottest month with an average high of 27.7°C. July is the coldest month when the average high drops to . The highest maximum temperature recorded in the territory was 44.0°C on 4 January 2020. The lowest minimum temperature was −10.0°C on 11 July 1971. Rainfall varies significantly across the territory. Much higher rainfall occurs in the mountains to the west of Canberra compared to the east. The mountains act as a barrier during winter with the city receiving less rainfall. Average annual rainfall in the territory is 629mm and there is an average of 108 rain days annually. The wettest month is October with an average rainfall of 65.3mm and the driest month is June with an average of 39.6mm. Frost is common in the winter months. Snow is rare in Canberra's city centre, but the surrounding areas get annual snowfall through winter and often the snow-capped mountains can be seen from the city. The last significant snowfall in the city centre was in 1968. Smoke haze became synonymous with the 2019/2020 Australian summer. On 1 January 2020 Canberra had the worst air quality of any major city in the world, with an AQI of 7700 (USAQI 949). Geology Notable