Montréal
August
Weather in Montréal for August 2025
Your guide to Montréal weather in August - trends and predictions
In general, the average temperature in Montréal at the beginning of August is 25.4 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 22.3 °C by the end of August.
Expect significant rainfall in Montréal during August, with an average of 20 rainy days.
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11
Dry days
20
Rainy days
0
Snow days
24°/14°
Temperatures
16 km/h
Avg max wind
79 %
Avg humidity
Montréal in August average weather
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| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  26° | 2  27° | 3  27° | ||||
| 4 27° | 5 23° | 6 25° | 7  23° | 8 24° | 9 23° | 10 24° |
| 11 23° | 12 22° | 13 26° | 14 26° | 15 25° | 16 27° | 17 25° |
| 18 25° | 19 19° | 20 22° | 21 19° | 22 20° | 23 24° | 24 25° |
| 25  20° | 26 22° | 27  24° | 28  22° | 29 25° | 30 22° | 31  21° |
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Temperatures trend during August in Montréal
See the weather trend as well as the moving average line
August weather day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Aug. | Patchy rain possible | 26° /16° | 0.5 mm | 6 | |
| 2 Aug. | Overcast | 27° /15° | 0 mm | 7 | |
| 3 Aug. | Moderate or heavy rain shower | 27° /18° | 12.1 mm | 6 | |
| 4 Aug. | Moderate or heavy rain shower | 27° /17° | 14.5 mm | 6 | |
| 5 Aug. | Patchy rain possible | 23° /14° | 6 mm | 6 | |
| 6 Aug. | Overcast | 25° /14° | 0 mm | 6 | |
| 7 Aug. | Heavy rain at times | 23° /14° | 13.4 mm | 6 | |
| 8 Aug. | Moderate or heavy rain shower | 24° /15° | 26.9 mm | 6 | |
| 9 Aug. | Patchy rain possible | 23° /16° | 40.2 mm | 5 | |
| 10 Aug. | Moderate or heavy rain shower | 24° /16° | 18.1 mm | 6 | |
| 11 Aug. | Patchy rain possible | 23° /14° | 2.5 mm | 5 | |
| 12 Aug. | Moderate or heavy rain shower | 22° /13° | 4.7 mm | 5 | |
| 13 Aug. | Patchy rain possible | 26° /16° | 1.5 mm | 6 | |
| 14 Aug. | Patchy rain possible | 26° /15° | 0.6 mm | 6 | |
| 15 Aug. | Patchy rain possible | 25° /16° | 0.9 mm | 6 | |
| 16 Aug. | Moderate or heavy rain shower | 27° /17° | 6.6 mm | 6 | |
| 17 Aug. | Moderate rain at times | 25° /17° | 2.2 mm | 6 | |
| 18 Aug. | Moderate or heavy rain shower | 25° /18° | 15.7 mm | 6 | |
| 19 Aug. | Moderate or heavy rain shower | 19° /13° | 13.8 mm | 5 | |
| 20 Aug. | Patchy rain possible | 22° /12° | 4.3 mm | 5 | |
| 21 Aug. | Overcast | 19° /14° | 3.2 mm | 4 | |
| 22 Aug. | Patchy rain possible | 20° /12° | 4.1 mm | 5 | |
| 23 Aug. | Overcast | 24° /12° | 0 mm | 5 | |
| 24 Aug. | Overcast | 25° /14° | 0.8 mm | 6 | |
| 25 Aug. | Light drizzle | 20° /15° | 1.8 mm | 5 | |
| 26 Aug. | Light rain shower | 22° /15° | 2.6 mm | 5 | |
| 27 Aug. | Cloudy | 24° /14° | 0 mm | 6 | |
| 28 Aug. | Mist | 22° /12° | 5 mm | 5 | |
| 29 Aug. | Light rain shower | 25° /12° | 3 mm | 6 | |
| 30 Aug. | Light rain shower | 22° /11° | 2 mm | 5 | |
| 31 Aug. | Partly cloudy | 21° /13° | 2.7 mm | 5 | |
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Important Notice
Our weather forecast for Montréal in August is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Montréal forecast closer to your planned date for the most up-to-date weather information.
Montréal in August - FAQ
What are the expected maximum and minimum temperatures in Montréal during August?
Enjoy moderate daytime temperatures of up to 24° and cooler nights around 14°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Montréal during August?
Significant rainfall exceeding 241 mm is expected in Montréal during August, occurring over more than 20 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Montréal during August?
The average wind speed in Montréal during August is 16 km/h, suggesting breezy to windy conditions, depending on your activities.
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