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This paper goal to analyse the topoclimatic contrasts in urban and suburban space in Aracaju city. The result was established by comparing the data of temperature and relative humidity from urban weather stations with the data from the weather station, which are of a more suburban character. The relative frequency of occurrence of differences in maximum temperature higher than zero (%> 0), exceeding it in 96% of the times in the city centre and about 100% frequency during late morning until evening. Furthermore, the center station recorded 3,6oC on average greater than the airport station. The results indicts significant evidence of the thermal and hygrometric differences between the urban and periurban area, leading to substantial evidence of the occurrence of heat islands in the mentioned in Aracaju.