Temperature Controls in the city of Brasilia in Brazil

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Capital City: Brasilia 15.7989° S, 47.8667° W

The city's warmest month is September with an average monthly temperature of 71.1 F.
The coldest month is July with an average monthly temperature of  64.9 F

Based on the information above the annual range of temperature for Brasilia is 6.2 F

Retrieved from: http://en.wikipedia.org/wiki/Bras%C3%ADlia

Geographic Location

Elevation is one temperature control that has a major impact on Brasilia's regional temperature. At an elevation of 3,845ft and at 15.7989 South, the city has a very moderate tropical climate. The higher elevation keeps the city cooler than it otherwise would be at sea level for this latitude.

One temperature control that does not impact Brasilia are ocean currents.  The city is approximately 765 miles from the coast of the South Atlantic Ocean.  Thus, cool water traveling upward along Brazil's coastline from the south does not have an impact on the city's regional temperature.

Temperature, Climate and the Future

The Intergovernmental Panel on Climate Change released a report called: Climate Change 2014: Impacts, Adaptation, and Vulnerability.  In this report, the general consensus for the northern part of Brazil is that it will get drier and the southern highlands will become wetter.  The report also states:  

There is medium confidence that droughts will intensify along the 21st century in some seasons and areas due to reduced precipitation and/or increased evapotranspiration in Amazonia and Northeast Brazil.

To the south is much of the country's agriculture sector.  The prediction for this area is that it will receive an increase in rainfall and higher probability for flooding.