Montreal weather in January
The culmination of the long winter occurs in January, with the lowest average temperatures. Even though the latitude is not very high, the season is bitterly cold due to the frequent outbreaks of cold air masses from the north and north-east. Frost and snowfall are common, and some years also see real snowstorms. Intense cold waves with the lows plunging to -25/-30 °C (-13/-22 °F) hit Montreal practically every year. At the same time, the weather is unstable, and even in the dead of winter, the mercury might occasionally rise above freezing and cause the snowmelt. The sun is rarely seen in the sky.
To feel warm and comfy during the freezing cold, pack warm winter gear, including thermal underwear, a down jacket, warm boots, a woolen hat, scarf, and gloves.
Montreal weather in February
One of the coldest months in Montreal with typically freezing temperatures. Snowfall occurs regularly. Some years might also experience real snowstorms. The bitter cold is accompanied by the freezing air masses blowing from the north and north-east. Practically every year has extremely frigid lows that drop to -25/-30 °C (-13/-22 °F). On the other hand, given the constant weather instability, the temperature can rise above the freezing point, which is still rarer. Then one can expect thaw and rain. The sunshine is quite scarce in February.
Prepare for the winter by packing thermal underwear, a down jacket, boots, a warm hat, scarf, and gloves.
Montreal weather in March
The first half of March is fairly taken as a part of the winter season, while snow may cover the ground well into April. Outbreaks of polar air masses still occur, bringing bitter cold to Montreal. The air conditions advance a little by the end of the month, with frost and snowfall being less frequent. The weather is quite unstable, with frequent temperature swings. The first warm days come bringing rainfall, but then cold weather returns. The sun is still rarely seen in the sky.
To feel warm and comfy, bring winter garments such as a down jacket, a hat, gloves, and a scarf, and also pack an umbrella.
Montreal weather in April
Spring in Montreal is typically quite cold, with the average lows hovering around freezing. Snowfall is still possible, but rain is more natural for the season. Given the weather instability, temperature swings are usual for April. The first warm days alternate with the returns of the cold weather. But severely frigid waves are unlikely to happen. The amount of sunshine is gradually increasing as the month progresses.
Winter clothing is still relevant for the cold April days, but milder days also happen. So it's advisable to dress in layers to be able to adjust to the changeable weather. A raincoat or umbrella will be helpful.
Montreal weather in May
The month of May brings mild weather to the city. Cold spells and sleet can still occur at the beginning of the month, but the likelihood is minimal. With the onset of warmer days, the thunderstorms begin to develop in the afternoons. The days in late spring are long and boast ample sunshine. Unstable weather and temperature changes are typical for spring. Still, late May is considered the beginning of relatively good weather in Montreal.
Pack for both cool and warm days. Dressing in layers is reasonable. A raincoat or umbrella will come of use too.
Montreal weather in June
June offers mostly mild to warm temperatures. Some days may be a bit cold and cloudy, especially in the beginning of the month. However, the weather is mostly sunny and pleasant. On the fine-weather days, thunderstorms are likely to break out in the afternoon. The periods of hot and humid weather also occur. The muggy conditions are determined by the rivers of Saint Lawrence and Ottawa, which provide additional moisture. Generally, the weather advances towards the end of June.
Pack a mix of short- and long-sleeved shirts, a sweatshirt, and a light jacket. Don't forget a raincoat or an umbrella.
Montreal weather in July
Montreal people favor July more than any other month in the year. Ironically they say there are only two seasons in the city: winter and the month of July. Clearly, this is an exaggeration, but July indeed is the warmest and sunniest month of the year. Cooler or partly cloudy days can occur but rarely. Hot and muggy days are more likely to happen in August, with the highs exceeding 30°C (86 °F). Afternoon thunderstorms are also typical.
For a visit in August, bring light summer clothing, sunglasses, and sunscreen, some long-sleeved shirt or a light jacket for a chance of cooler day or night, and at last, a raincoat or an umbrella.
Montreal weather in August
The weather in early August has much in common with July. Hot and humid days are prevalent. The periods of fine weather are typically disturbed by afternoon thunderstorms. The days of intense heat alter with cooler and cloudy ones. The peak of summer is gone by mid-August, and the month is prone to have more cooler days and slightly less sunshine closer to the end of the season. Anyways, it's a lovely time to visit Montreal.
Pack light summer clothing, sunglasses, and sunscreen. A light jacket or a sweatshirt will be appropriate for the cooler days and evenings. A raincoat or an umbrella is reasonable for the rainy afternoons.
Montreal weather in September
September is mostly loved for mild weather, autumn foliage, and the Indian summer period characterized by summer-like warmth. These are usually the last warm days in the year before the rapid drop of temperatures that might occur already in late September. The amount of sunshine is not high already in early autumn. The sky is often overcast or partly covered by clouds. It rains more often than in the summer, yet the rainfalls come in fewer amounts—the season of afternoon thunderstorms is over by the end of summer.
Pack a raincoat and an umbrella, a mix of short- and long-sleeved shirts for the changeable weather, a sweatshirt, and a jacket.
Montreal weather in October
Depending on the year, October could boast warm, temperate, or cold weather. In some years, the Indian summer season extends into early to mid-October. In others, the month could experience really cold days with the first snowfalls. Generally, the weather worsens as the month progresses—the precipitation consistently increases, the rainfalls get more abundant, the temperatures decrease, the sunshine becomes rarer, and the days get shorter. On the upside, seasonal foliage is splendid in October.
Check the weather forecast before packing your luggage, as it's quite changeable. Bring layers anyways to be ready for any type of weather. A warm jacket is usually essential in the second half of the month. An umbrella is a must.
Montreal weather in November
If the first cold days can occur or not in October, this inevitably happens in November. Early November is roughly classified as the fall season, while late November is recognized as the beginning of an extended Montreal winter. Initially, the weather is moderately cold, while it gets progressively colder towards the end of November. Precipitation is high—rainy weather is prevailing, but the first frosts are typical in late November. The days in November are short, and the sun appears in the sky very seldom.
For November, you'll need to pack warm clothes, such as a coat, or possibly a down jacket. An umbrella will come in handy too.
Montreal weather in December
Winter weather is scaling up in December. The temperatures decrease progressively. Snowfall is regular, and frosts are common, with the average highs hovering below freezing point. Also, during a cold wave, the mercury can dip to -25/-30 °C (-13/-22 °F). The polar air masses increase the feeling of bitter cold. At the same time, the temperature can occasionally rise above freezing and cause the thaw. But usually, snow covers the ground for most of the month. December has some of the shortest days in the year, and the amount of sunshine is quite scarce.
For a visit in the cold season, bring your warm attire—a down jacket, a warm hat, scarf, and gloves, winter boots, and possibly also thermal underwear.