Climate is tropical monsoonrainforest climate, isothermal (type AmAf i, according to Köppen),<ref>[https://www.webcitation.org/5woJIl5YK World Map of the Köppen-Geiger climate classification (April 2006). «World Map of the Köppen-Geiger climate classification "(in English). Institute for Veterinary Public Health. Archived from the original on 27 February 2011. Consulted on 28 January 2014.]</ref> with the driest quarter in July to September (268 millimeters). The average annual temperature is 27.2 °C (80.96 °F) with the maximum thermal average 31.7 °C (89.06 °F) and the minimum average 24.3 °C (75.74 °F).<ref>[http://www.inmet.gov.br/webcdp/climatologia/normais/imagens/normais/planilhas/Temperatura-Media-Compensada_NCB_1961-1990.xls «Medium Temperature Compensated (° C) ". National Institute of meteorology. 1961-1990. Archived from the original on 4 may 2014. Consulted in August 2014 8.]</ref> The hottest month is October, which has an average temperature of 28.5 °C (83.3 °F), and, this month, the average of 33.7 °C (92.66 °F) maximum and minimum 24.7 °C (76.46 °F). The relative humidity is 83.5%, with an annual rainfall of 2302.2 millimeters (mm), with March the most precipitation (324.2 mm), annual insolation of 2 200 hours with a major record in the month of August. According to data from the National Institute of meteorology (INMET), for the period of 1967 to 1990 and from 1993, the lowest temperature recorded in Parintins was 12.9 °C (55.22 °F) on January 2, 1975 and the biggest hit 39 degrees Celsius on 7 January 1998. The highest accumulated rainfall in 24 hours was 173 mm on 29 November 1972. In March 1999 it was observed the greatest total volume of rain accumulated in a month of 773.3 mm, followed by 709.2 mm in January 2013.<ref>[http://www.inmet.gov.br/projetos/rede/pesquisa/inicio.php «BDMEP -Historical series-monthly data-Total Precipitation (mm)-Parintins»]. Instituto Nacional de Meteorologia. Consulted in August 8, 2014.</ref>