Montreal Weather
A month-by-month look at temperature, rainfall and what to pack in Montreal. The annual average is 11°C high / 2°C low — hottest in July (26°C) and coldest in January (-14°C).
Montreal Weather at a Glance
As of 2026A quick summary of Montreal's year-round climate and the best time to visit.
- Annual average
- 11° / 2°
- Best time to visit
- June, July, August
- Hottest month
- July (26°C)
- Coldest month
- January (-14°C)
- Wettest month
- November (92mm)
- Driest month
- February (62mm)
As of 2026, Montreal's weather averages 11°C high / 2°C low across the year, and the best time to visit for stable temperatures, rainfall and crowds is June, July, August. The hottest month is July (26°C), the coldest is January (-14°C), and the wettest is November (92mm).
Best Time to Visit Montreal
June marks Montreal's real festival season start. 13-24°C + 9.5 sunshine hours + 12 rainy days. Montreal Jazz Festival (late June to early July, world's largest jazz festival, 10 days, 3,000+ artists, Place des Festivals outdoor stages free) + Canadian Grand Prix F1 (second Sunday of June, Circuit Gilles Villeneuve, sells out 1-3 months ahead, $220-520) + Mural Festival (mid-June, 11 days, Saint-Laurent Boulevard). Hotels run 1.3x average + F1 weekend + Jazz Festival weekend at 1.5-2x. Second and third weeks of June are best value before late-June surge. Fête nationale (June 24, Quebec national holiday with fireworks) is bonus.
July is Montreal's peak season. 16-26°C + 10 sunshine hours. Jazz Festival final week (first week of July) + Just for Laughs (mid-July, world's largest comedy festival, $22-60 indoor) + International des Feux Loto-Québec (July-Aug, La Ronde amusement park, every Saturday fireworks, free viewing from Jacques-Cartier Bridge). Korean + Japanese summer vacation airfares spike + hotels run 1.5-2x peak. Old Montreal + Plateau + Mile End + Jean-Talon Market all at peak crowds. Canada Day (July 1) brings parade + fireworks + Place des Festivals concerts.
August matches July's peak. 15-25°C + 9 sunshine hours. International des Feux final week + Osheaga Music Festival (first weekend of August, Parc Jean-Drapeau, $110-300, 100+ artists with past headliners Foster the People, Lana Del Rey, Lorde, Kendrick Lamar) + Pride Montreal (second week of August, LGBTQ festival, Canada #2 Pride, parade Sunday). Korean + Japanese summer + late-summer European tourism drive hotel rates 1.5-2x. Sunday Pride parade (second Sunday of August) is the festival climax. Rainbow Crosswalks on Sainte-Catherine East from May-Sep peak engagement.
Montreal Weather Month by Month
Tap any month for a detailed guide with what to wear, sunrise/sunset and air quality.
| Month | High/Low | Rain | Rainy days | Crowds | |
|---|---|---|---|---|---|
| January | -5° / -14° | 78mm | 14 | Quiet | Details → |
| February | -3° / -12° | 62mm | 12 | Quiet | Details → |
| March | 2° / -6° | 75mm | 13 | Quiet | Details → |
| April | 11° / 1° | 80mm | 13 | Moderate | Details → |
| May | 19° / 8° | 75mm | 13 | Moderate | Details → |
| June | 24° / 13° | 87mm | 12 | Busy | Details → |
| July | 26° / 16° | 90mm | 12 | Very busy | Details → |
| August | 25° / 15° | 88mm | 11 | Very busy | Details → |
| September | 20° / 11° | 87mm | 12 | Busy | Details → |
| October | 13° / 5° | 78mm | 12 | Moderate | Details → |
| November | 6° / -1° | 92mm | 14 | Quiet | Details → |
| December | -2° / -10° | 88mm | 14 | Busy | Details → |
What to Wear in Montreal by Season
Real spring. Light jacket + long-sleeve + sneakers. Like mid-April in NYC or Boston. Rain frequent — waterproof shell + umbrella essential. Mornings still chilly +5°C.
Mid-summer + humidity. T-shirt + shorts + swimsuit (lake/pool). Like early July in NYC. 10 sunshine hours + UV 9 = strong. Frequent afternoon thunderstorms. Light cardigan for AC restaurants + evening.
Autumn. Jacket + long-sleeve + waterproof shell. Like mid-late October in Korea. Foliage peak first half. Mornings cold +5°C, afternoons +13°C — layered clothing essential.
Similar bitter cold to January. Heavy down parka + waterproof anti-slip boots + beanie + insulated gloves essential. Slightly more daylight than January but wind chill still hits -25°C regularly.
Montreal Weather FAQ
What is the best time to visit Montreal? +
For weather, June, July, August are the most comfortable months. Highs sit around 24°C with relatively stable rainfall and crowds.
What are the hottest and coldest months in Montreal? +
The hottest month is July with an average high of 26°C, and the coldest is January with an average low of -14°C. The annual average is 11°C high / 2°C low.
When does it rain most in Montreal? +
The wettest month is November (92mm over about 14 rainy days) and the driest is February (62mm). Total annual rainfall is roughly 980mm.
What should I pack for Montreal? +
Spring (Mar–May) averages 11/1°C — Real spring. Light jacket + long-sleeve + sneakers. Like mid-April in NYC or Boston. Rain frequent — waterproof shell + umbrella essential. Mornings still chilly +5°C. Summer (Jun–Aug) averages 25/15°C — Mid-summer + humidity. T-shirt + shorts + swimsuit (lake/pool). Like early July in NYC. 10 sunshine hours + UV 9 = strong. Frequent afternoon thunderstorms. Light cardigan for AC restaurants + evening. Autumn (Sep–Nov) averages 13/5°C — Autumn. Jacket + long-sleeve + waterproof shell. Like mid-late October in Korea. Foliage peak first half. Mornings cold +5°C, afternoons +13°C — layered clothing essential. Winter (Dec–Feb) averages -3/-12°C — Similar bitter cold to January. Heavy down parka + waterproof anti-slip boots + beanie + insulated gloves essential. Slightly more daylight than January but wind chill still hits -25°C regularly.
What is the weather in Montreal this month (June)? +
June averages 24°C high / 13°C low with 87mm rainfall over about 12 rainy days. Crowds are busy and prices are high.
Keep Planning Your Montreal Trip
Why you can trust weather guide
Based in Chiang Mai for 8+ years, with 30+ countries visited across Southeast Asia, Japan, and Europe. Every detail in this guide is primary-source verified as of April 2026, with prices auto-refreshed via live exchange rate APIs. This isn't AI-generated boilerplate — it's written from the perspective of someone who has actually been there.