Belleville's winters are long and cold, with temperatures often dropping below -20°C in January and February, but gradually warming up by March. Spring brings moderate temperatures, ranging from around 0°C to 20°C, as the season transitions into warmer summer months. Summer is warm and stable, with highs consistently above 25°C from June to August. Autumn sees a return to cooler temperatures, similar to those in spring, before winter sets back in. Overall, Belleville's temperature fluctuations are relatively mild, but winters can still be quite chilly.