Under the Köppen climate classification, Cuiab a has a tropical wet and dry climate. Cuiab a is famous for its searing heat, although temperatures in winter can arrive sporadically at 10 degrees, indeed atypical, caused by cold fronts coming from the south, and that may only last one or two consecutive days, to then return to usual heat. The average temperature in Cuiab a is around 22.5 Celcius . The climate is tropical and humid. Rainfall is concentrated from September to May, while the rest of the year the mass of dry air over the center of Brazil rainy inhibit the formations. The cold fronts when dissipate the heat associated with the smoke produced by fires set at the time, does the relative humidity drops to very low levels, sometimes below 15 Percent, increasing cases of respiratory diseases. The average annual rainfall is 1469.4 mm, with maximum intensity in January, February and March. The mean maximum temperature reaches 35 Celcius , but the absolute maximum can reach 40 Celcius in warmer months and muffled; on rainy days, the maximum temperature is only 28 degrees. The average low in July, the coldest month is 15.0 Celcius with wind chill of 10 Celcius . According to INMET (1961–1990), the lowest recorded temperature was 3.3 Celcius on July 18, 1997 and the highest 43.1 Celcius on October 16, 2009
