Home › Weather › Montreal Weather Monthly
Live forecasts update automatically; written guidance last reviewed 16 June 2026 by the Canada Perspective Weather Desk. Data from Environment and Climate Change Canada and other national met services via Open-Meteo.
Live data from Open-Meteo · updates automatically ·
Montreal’s weather month by month moves from bitterly cold, snowy winters to warm, humid summers, with crisp spring and fall transitions. The live forecast above gives today’s conditions; below you’ll find the monthly averages for Montreal in celsius, plus context from the St. Lawrence River corridor and the adjacent Laurentian foothills.
What are Montreal’s monthly temperature and precipitation averages?
Montreal weather monthly averages show January as the coldest month, with a mean daily high around -6°C and a low near -15°C, while July peaks at roughly 26°C with overnight lows near 16°C. Precipitation is spread fairly evenly year‑round, though summer months bring frequent thunderstorms and winter months deliver heavy snow—averaging about 210 cm annually. The shoulder seasons, especially May and October, offer the city’s most comfortable weather for outdoor plans.
How does Montreal’s weather change through the seasons?
Spring (March–May) sees temperatures climb from freezing to the mid‑teens, with Montreal weather may celsius averaging 14°C–21°C highs—ideal for visiting Mount Royal or Old Montreal. Summer (June–August) is hot and humid, often with humidex values above 35°C. Fall (September–November) brings crisp air and vivid foliage, then winter (December–February) locks the city in deep cold and regular snowfall. For a detailed 30-day outlook, check the weather montreal 30 days celsius section from the live forecast above or visit our Canada weather hub.
What is the best month to visit Montreal for mild weather?
May and September typically offer the most pleasant balance: comfortable highs in the upper teens to low twenties, low humidity, and fewer rainy days. May 2026 is expected to follow that pattern based on long‑term averages.
How much snow does Montreal get each winter?
Montreal averages about 210 cm of snow annually, with the heaviest falls in December and January. Snow cover often persists from early December through late March, affecting driving and outdoor activities.
Where can I find Montreal’s monthly weather data by month in celsius?
Environment and Climate Change Canada publishes official normals for Montreal–Pierre Elliott Trudeau International Airport. Local forecast sites and the Montreal weather page also provide montreal weather by month celsius averages.
Sources
For more seasonal comparisons, see Ottawa Weather for the nearby capital or Toronto Weather for a lake‑moderated climate. If you are planning ahead, weather montreal may 2026 tends to follow the typical spring warming trend, while montreal weather monthly averages remain a reliable guide for any time of year.