Castanhal, Brazil experiences a warm and humid climate year-round. The summer months, January to March and May to September, bring high temperatures ranging from 22°C to 34°C, with an average of around 26-27°C. Winters are mild, with temperatures varying between 21°C and 34°C, while the spring and autumn seasons have similar conditions to summer. Overall, the temperature remains relatively stable throughout the year, with no significant drop or rise in temperature. The warmest months are October to December, with average highs of around 27°C.