Winters in Trois-Rivieres are harsh, with temperatures often plummeting below -30°C in January and February, averaging around -7°C to -8°C. As the season progresses, temperatures gradually warm up by March, still chilly but relatively milder at an average of -2°C. Spring brings a significant increase in temperature, with April and May averaging around 7°C and 13°C respectively. Summers are mild and pleasant, with June and July temperatures averaging around 19°C, while August is slightly warmer, reaching up to 33°C on occasion. Autumn sees a return to cooler temperatures, with September and October averaging around 16°C and 11°C, before dropping again in November and December.