Kuala Kapuas experiences a relatively consistent year-round climate, with temperatures rarely dipping below 21°C or rising above 38°C. The warmest months are April and August, when highs can reach up to 35°C and 38°C respectively, while the coolest month is July, with highs around 34°C. Temperatures in other months range from 22-34°C, with averages usually around 26-28°C. There is little seasonal variation in temperature throughout the year. The climate remains warm and humid, with no distinct cool or cold season.