São Carlos is located in the geographic center of the São Paulo state, approximately from the
city of São Paulo. The city is the center of a
microregion with 308,777 inhabitants. The elevation is over 856 m. Most of the year the city is windy and sunny, with hot temperatures during all the year. The city has a total area of , which includes two districts to the north (
Santa Eudóxia and
Água Vermelha), one district to the west (
Bela Vista São-carlense), and one district to the east (
Vila Nery).
Geology The municipality is included in the
geomorphological province of the
Basaltic and
sandstone slopes, between the provinces of the
Western Plateau (to the north) and the Paulista Periférica Depression (to the south). In São Carlos, included in the
Paraná Basin, outcrops are found of the following geological formations: Bauru (Bauru Group), on the back of the slopes (Planalto de São Carlos), where the largest portion of the
urban nucleus, further north; Serra Geral (São Bento Group), in the narrow region of slopes where
relief occurs (slopes); Botucatu (São Bento Group), which contains the lower part of the slopes, further south, besides including the Guarani Aquifer. The
soil of the municipality consists mainly of, in descending order: red-yellow
latosol (LV); purple
latosol (LR); deep
quartz sand (AQ); dark red
latosol (LE); structured purple earth (ET); only
lithographic (Li); hydromorphic soil (Hi) and
Podzolic soil (PV).
Vegetation The original vegetation of the municipality, and the respective remnants, correspond respectively to: forest
cerrado (cerradão, 16% and 2%);
savanna (cerrado s.s., campo cerrado, campo campo) and campo (humid clean field); 27% and 2%);
Atlantic Forest in the interior (
semi-deciduous and
riparian forests, 54% and 1%);
Araucaria forest (
semideciduous forest with
araucaria, 1% and 0%) and capoeiras (degraded forests, 0% and 1%). Currently, much of the vegetation has been replaced by
silvicultural plantations,
Pastures and
forestry. It should be remembered that, in the meantime, the proportions indicated above, partly obtained from interpretations of satellite images, have some uncertainty due to the difficulty of differentiating artificial grasses from natural clean fields. In a general view the savanna of Brazil. In 2020 and 2021 the city was recognized in the international Urban Forest program "Tree Cities of the World" organized by the Food and Agriculture Organization of the United Nations (FAO/UN). According to the Ph.D. Urban Forester Daniel Caiche, this recognition promotes cities committed to planning and managing the Urban Forest.
Hydrography The municipality is inserted between two Hydrographic Units of Water Resources Management (UGRHI): No. 9,
Mogi-Guaçu, and No. 13,
Tietê-Jacaré. The urban area is mainly located in the catchment area of the
Monjolinho river, included, serially, in the
Jacaré-Guaçu,
Tietê,
Paraná and La Plata river basins. The urban area is cut by the rivers
Monjolinho,
Gregório and Santa Maria do Leme, and the streams Tijuco Preto, Simeão, Agua Quente and Água Fria, among others. The basin of the
Mojiguaçu river, which has the
Quilombo river, Araras stream, Cabaceiras stream, Guabirobas stream, Jararaca stream, Água Branca stream, Brejo Grande stream or Água Vermelha stream, Matinha stream, Negro stream, Pântano stream, stream Waterfall. The basin of the
Jacaré-Guaçu river, which has the
Monjolinho river, Feijão stream, Cã Cã stream, and Sour Orange stream. The basin of the
Monjolinho river, which counts with the stream Santa Maria Magdalena (or stream Santa Maria do Leme), stream of the Jockey Club, stream Espraiado, stream Federal, stream Belvedere, stream Bridge of Tábua, stream Alto Monjolinho, stream Mineirinho, creek Santa Fé, Paraíso stream, Tijuco Preto stream, Gregório stream, Botafogo stream, Medeiros stream, Água Quente stream and Água Fria stream. The Gregório stream basin, which tarts in a rural area to the east of the city in approximately 900 meters of altitude (where the
Monjolinho river and the
Negro river are born, important water courses of this municipality). It has as tributaries by the right bank the First Water stream near
SP-310 before the Gregorio stream crosses the highway, Sorregotti stream near Educativa; Lazarini stream near Major Manuel Antonio de Matos Street, Biquinha stream in Visconde de Inhaúma Street (and on the left bank the Simeão stream in the (canalized) market region, and runs westward for approximately 7 km, where it flows into the
Monjolinho river, near the shopping center.
Environment Part of São Carlos is included in the
Corumbataí Environmental Protection Area (APA). Other conservation units are nearby: Itirapina Ecological Station (EE), EE Mata do Jacaré, and EE Jataí. In rural areas, there are also fragments of important native vegetation in some private legal reserves (LR), such as
Fazenda Canchim, by
Embrapa. The city presents a percentage of regularized properties for LRs, above the average calculated for the state. As for the
Permanent Preservation Areas (PPAs) of the rivers, many of those occurring in the urban area were irregularly occupied by marginal roads and buildings. However, little was done to compensate for the construction of these fringes, as well as to increase the minimum proportion of permeable area in adjacent plots. In addition, many rivers have been rectified or channeled, which are now considered inadequate. These factors, together, are determinant for the occurrence of floods in the city's lowlands. The urban afforestation of the urban road network is diverse, but in quantitative terms, the number of trees is still very low, and many have conflicts with surrounding public facilities, such as aerial wiring and paving. As for pollution, the municipality has about two dozen areas contaminated, in particular, by waste from fuel stations, and dumps and landfills
Climate According to the
Köppen Climate Classification, the city has a tropical climate Aw with dry winter and hot months According to data from the National Institute of Meteorology (
INMET), since 1961 the lowest temperature recorded in São Carlos (conventional station of UFSCar) was 0,9 °C on 17 July 2000, and the highest reached 38.7 °C on 7 October 2020. The largest accumulated precipitation in 24 hours was 143.1 mm on 13 February 1980. The lowest relative air humidity index was 10%, recorded on 13 September 2010, 6 September 2011 and 16 September 2017 of that month. {{Weather box|width=auto {{cite web {{cite web {{cite web {{cite web {{cite web {{cite web == Demographics ==