The national capital's climate is Tropical savanna climate (Aw) according to many of Koppen's classifications. Brasilia's climate closely borders a subtropical highland climate (Cwa/Cwb), showing many of the "eternal spring" features of that climate. The individual seasons are defined according to the degree of humidity of the air: one season is dry, while the other one is comparatively humid. The average temperature is 20.5 °C (68.9 °F).
September, at the end of the dry season, has the highest average maximum temperature, 28 °C (82 °F), and July has the lowest average maximum temperature, 26 °C (79 °F). The lowest average minimum temperature is in June and July 11 °C (52 °F). Average temperatures from September through April are a consistent 22 °C (72 °F). Those, however, are monthly averages; temperatures sometimes fall outside of this range. The absolute minimum temperature recorded was 0 °C (32 °F), and the absolute maximum was 37 °C (99 °F).
The dry season lasts from late March or early April to late September or early October, though there is commonly some rain also in late May. Humidity averages about 50% during the dry season, but often falls below 30% around noon
