Winters in Dollard-des-Ormeaux are long and cold, with temperatures often dropping below -20°C for several weeks. The coldest months are January and February, averaging around -6°C to -7°C, while December is slightly milder but still quite chilly. Spring arrives slowly, with March still experiencing some chilly days, but April and May bring a significant warming trend, with average temperatures rising to 8°C and 14°C respectively. Summer months of June, July, and August are mild and pleasant, with average highs in the mid-20s to low 30s Celsius, while September brings a gradual cooling trend, but still relatively warm. Autumn is characterized by moderate temperatures, with October and November averaging around 11°C and 2°C respectively.