Rimouski's winters are harsh and cold, with temperatures often dropping below -20°C in January and February, averaging around -6 to -7°C. As spring approaches, temperatures gradually rise, reaching averages of 3°C in April and 8°C in May. Summer brings mild temperatures, ranging from 15°C to 19°C on average during June to August, with July and August being the warmest months. Autumn is cool, with temperatures dropping back down to around 2°C by November. Winters return, similar to those in January and February, as December's averages dip back down to -5°C.