Montreal Weather in August: Climate, Temperature & Travel Tips
Avg 21.2°C · 109mm rain — August is summer in Montreal.
- Avg high
- 25.5 °C
- Avg low
- 16.8 °C
- Avg
- 21.2 °C
- Precipitation
- 109 mm
Source: Open-Meteo Archive 2014–2023 · 10-year climate normals
Climate Overview
August in Montreal, Canada brings summer conditions: average temperature 21.2°C, average high 25.5°C, average low 16.8°C. Monthly rainfall averages 109mm, making it a moderate-rainfall time of year.
Conditions are pleasant for most travel activities.
What to Pack
- Short sleeves and light pants; sunglasses
- Light shoes or sandals
- A light rain jacket as backup
Best Things to Do
- Walking tours and city exploration
- Parks and outdoor cafes
- Seasonal food and night markets (where applicable)
Pros and Cons of Visiting in August
Pros:
- Pleasant temperatures for walking and outdoor sightseeing
Cons:
- Peak season — expect higher prices and more crowds
Climate source: Open-Meteo Archive (2014–2023).
Colour = avg temperature · blue = cool · orange = warm
- 1 July 22.0°C
- 2 August 21.2°C
- 3 June 19.2°C
- 1 January -7.4°C
- 2 February -6.4°C
- 3 December -4.0°C
FAQ
01 What is the average temperature in Montreal in August? +
The average is 21.2°C, with a high of 26°C and a low of 17°C.
02 What is Montreal like to visit in August? +
It is summer in Montreal, which is ideal for outdoor exploration.
03 Does it rain often in Montreal during August? +
Average rainfall is 109mm, which is moderate.
04 What should I pack for Montreal in August? +
Short sleeves and light pants; sunglasses; Light shoes or sandals.
05 Is August a peak travel season for Montreal? +
Generally yes — book accommodations and flights well in advance.
06 Where does this climate data come from? +
Monthly averages computed from Open-Meteo Archive 2014–2023 daily observations.
- Sources
- Open-Meteo Archive 2014-2023
- Updated
- 2026-04-17