Resumo. This article is a retrospective ecological study, of descriptive analysis, that evaluates the spatial distribution of Aedes aegypti breeding sites and its correlation with environmental and climate characteristics of the western region of Santa Catarina. Its objective was to analyze the spatial distribution of breeding sites by mapping and correlating with climatic and environmental variables in the period between 2009 and 2017, by mapping breeding sites with Ae. Aegypti larvae by the use of Google Maps, correlating the temperature and precipitation averages. It was found a positive relation between temperature increase and the number of outbreaks, and it also established that the high rainfall averages in this region may influence the spread of the mosquito, but this information could not be confirmed in the present study. It was concluded that the temperature was a determining factor in the dissemination of the vector, being higher than the precipitation variable in the analyzed region.