30YearWeather
Montreal in August
Montreal weather in August - Canada
😊Warm & Pleasant

Montreal Weather in August

Plan your August trip to Montreal, Canada. Based on 30 years of NASA data, expect temperatures of 25°C (high) to 16°C (low), with 28% rain probability and 8 hours of daily sunshine. Pack rain gear for around 23 rainy days.

Avg High
25°C

Hottest around day 2

Avg Low
16°C

Coolest around day 31

Rainy Days
23days

28% avg rain chance

Sunshine
8hrs/day

Summer season

Montreal August Weather Calendar

Click any day to see detailed weather information

Currency

CAD

$ Canadian dollar

Language

English

+1 more

Driving

Right side

Connect

Montreal has four area codes: the long-s...

Safety

Very High Safety

GPI: 1.389

Travel Intelligence

Exclusive flight analytics & health data for Montreal

Smart Flight Estimator

Airport-to-Airport Logistics

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Flight Connectivity Analysis

Airport traffic data & seasonal patterns

Well Connected
63/ 100
Traffic Index

Popular destination

Peak Daily Arrivals

0

slots per day

Peak

Jul

Low

Feb

Monthly Traffic Distribution

211
Jan
211
Feb
222
Mar
238
Apr
297
May
322
Jun
342
Jul
307
Aug
301
Sep
283
Oct
252
Nov
276
Dec
Traffic Level
Low Season

Key Connections

Toronto Pearson (YYZ)
New York La Guardia (LGA)
Halifax Stanfield (YHZ)
Chicago O'Hare (ORD)
Ottawa Macdonald-Cartier (YOW)

Health & Safety Advisory

CDC travel health recommendations

6 Recommendations
COVID-19

All eligible travelers should be up to date with their COVID-19 vaccines. Please seeYour COVID-19 Vaccinationfor more information.

Hepatitis A

Consider hepatitis A vaccination for most travelers. It is recommended for travelers who will be doing higher risk activities, such as visiting smaller cities, villages, or rural areas where a traveler might get infected through food or water. It is recommended for travelers who plan on eating street food.

Hepatitis B

Recommended for unvaccinated travelers younger than 60 years old traveling to Canada. Unvaccinated travelers 60 years and older may get vaccinated before traveling to Canada.

Measles

Cases of measles are on the rise worldwide. Travelers are at risk of measles if they have not been fully vaccinated at least two weeks prior to departure, or have not had measles in the past, and travel internationally to areas where measles is spreading.All international travelers should be fully vaccinated against measles with the measles-mumps-rubella (MMR) vaccine, including an early dose for infants 6–11 months, according toCDC’s measles vaccination recommendations for international travel.

Rabies

Dogs infected with rabies are not commonly found in Canada.Rabies is commonly found in some terrestrial wildlife species and bats.If rabies exposures occur while in Canada, rabies vaccines are typically available throughout most of the country.Rabies pre-exposure vaccination considerations include whether travelers 1) will be performing occupational or recreational activities that increase risk for exposure to potentially rabid animals and 2) might have difficulty getting prompt access to safe post-exposure prophylaxis.Please consult with a healthcare provider to determine whether you should receive pre-exposure vaccination before travel.For more information, seecountry rabies status assessments.

Yellow Fever

CDC recommendations:Vaccine isnotrecommended.Country entry requirements:Vaccine isnotrequired.Updated April 23, 2025

Source: CDC Travelers' Health

View Complete Health Guide

Is August a Good Time to Visit Montreal?

👍Very good conditions overall
Short Answer

Popular August in Montreal offers 25°C and 28% rain chance - excellent conditions that attract maximum visitors. Book 3-6 months ahead for best rates.

Decision Factors

Vaccinations required

Yellow Fever

Peak tourist season

90% of annual peak - expect crowds and peak prices

Ideal temperature range

24.7°C - perfect for sightseeing and outdoor activities

Plenty of sunshine

10.6h of sunshine daily

Exceptional dining scene

54 Michelin-listed restaurants

Good For

  • 👨‍👩‍👧‍👦
    Families with children

    Comfortable 24.7°C temperatures and low 28% rain risk

  • 👴
    Elderly travelers

    Comfortable 24.7°C temperature range with manageable humidity

  • 🏛️
    Cultural tourists

    Comfortable conditions for exploring museums and sites

  • 💼
    Business travelers

    Climate-controlled meetings unaffected by weather

  • 🌡️
    Heat-sensitive visitors

    Manageable 24.7°C without oppressive humidity

Who Should Avoid

  • 💰
    Budget travelers

    Peak season means premium prices everywhere

930 observations30-year historical data
Confidence: 95%

"According to 30YearWeather's analysis of 30 years of NASA POWER satellite data,Montreal in August averages 25°C with 28% precipitation probability."

📊 Source: 30YearWeather.com🛰️ Data: NASA POWER (1991-2021)View Methodology →

Frequently Asked Questions: Montreal in August

What are the temperatures in Montreal in August?

Daytime highs average 25°C, nights drop to 16°C. Temperatures remain fairly consistent.

How many rainy days in Montreal in August?

Expect around 23 days with measurable rainfall. Rain is unlikely to disrupt plans.

What to wear in Montreal in August?

Comfortable casual wear with a light jacket for evenings.

Is August peak season in Montreal?

This is shoulder season—moderate prices and manageable crowds.