Brasilia has a tropical savanna climate (''Aw'', according to the Köppen climate classification), milder due to the elevation and with two distinct seasons: the rainy season, from October to April, and the dry season, from May to September. The average temperature is . September, at the end of the dry season, has the highest average maximum temperature, , and July has major and minor lower maximum average temperature, of  and , respectively. Average temperatures from September through March are a consistent . With , December is the month with the highest rainfall of the year, while June is the lowest, with only . During the dry season, the city can have very low relative humidity levels, often below 30%.