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Weather in Mont-Royal for September 2026

Your guide to Mont-Royal weather in September - trends and predictions

    Temperatures

  • Until now, September 2026 in Mont-Royal is slightly cooler than the historical average by 0.9 °C.

  • The forecast for the next days in Mont-Royal predicts a temperature of 17.9 °C, which is cooler than the historical average.

  • In general, the average temperature in Mont-Royal at the beginning of September is 24.4 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 19.4 °C by the end of September.

    • Rain 🌧️

  • The climate of Mont-Royal in September is notably wet, with an average of 15 rainy days, and a total of 159.9 mm of precipitation.

    • More

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Average dry days
15
Dry days
Average rainy days
15
Rainy days
Average snowy days
0
Snow days
Average temperatures
22°/12°
Temperatures
Average wind speed
14 km/h
Avg max wind
Average humidity
72 %
Avg humidity

Mont-Royal Weather September

Move between months or click on a day
August
October
Sun.Mon.Tue.Wed.Thu.Fri.Sat.
1
Mist
24°
2
Mist
24°
3
Mist
25°
4
Mist
26°
5
Mist
25°
6
Mist
24°
7
Patchy light rain with thunder
23°
8
Light rain shower
21°
9
Cloudy
21°
10
Heavy rain
22°
11
Overcast
21°
12
Overcast
24°
13
Patchy rain possible
24°
14
Sunny
18°
15
Overcast
18°
16
Overcast
22°
17
Overcast
18°
18
Light rain shower
11°
19
Light rain shower
10°
20
Sunny
18°
21
Sunny
18°
22
Sunny
20°
23
Patchy rain possible
21°
24
Overcast
16°
25
Sunny
13°
26
Partly cloudy
20°
27
Mist
20°
28
Mist
22°
29
Mist
23°
30
Mist
22°

Temperatures trend during September in Mont-Royal

See the weather trend as well as the moving average line

September weather in Mont-Royal day by day

Click on a date for more information
August October
Date Weather Temperatures Rain UV More
1 Sept. Mist
Mist
 24° /12° 1.6 mm 5
2 Sept. Mist
Mist
 24° /13° 35.7 mm 5
3 Sept. Mist
Mist
 25° /15° 35.7 mm 5
4 Sept. Mist
Mist
 26° /15° 24.3 mm 6
5 Sept. Mist
Mist
 25° /15° 10.7 mm 5
6 Sept. Mist
Mist
 24° /15° 7.2 mm 6
7 Sept. Patchy light rain with thunder
Patchy light rain with thunder
 23° /12° 5.7 mm 5
8 Sept. Light rain shower
Light rain shower
 21° /12° 16.2 mm 4
9 Sept. Cloudy
Cloudy
 21° /9° 4.6 mm 4
10 Sept. Heavy rain
Heavy rain
 22° /11° 2.6 mm 6
11 Sept. Overcast
Overcast
 21° /11° 1.3 mm 6
12 Sept. Overcast
Overcast
 24° /10° 0 mm 5.2
13 Sept. Patchy rain possible
Patchy rain possible
 24° /17° 2.1 mm 3.7
14 Sept. Sunny
Sunny
 18° /10° 0 mm 4.9
15 Sept. Overcast
Overcast
 18° /10° 0.2 mm 4
16 Sept. Overcast
Overcast
 22° /15° 0.1 mm 6
17 Sept. Overcast
Overcast
 18° /11° 10.4 mm 4
18 Sept. Light rain shower
Light rain shower
 11° /8° 20.2 mm 3
19 Sept. Light rain shower
Light rain shower
 10° /8° 12.7 mm 2
20 Sept. Sunny
Sunny
 18° /8° 0 mm 5
21 Sept. Sunny
Sunny
 18° /9° 0 mm 5
22 Sept. Sunny
Sunny
 20° /11° 0 mm 5
23 Sept. Patchy rain possible
Patchy rain possible
 21° /13° 0.6 mm 5
24 Sept. Overcast
Overcast
 16° /7° 1.8 mm 4
25 Sept. Sunny
Sunny
 13° /4° 0 mm 4
26 Sept. Partly cloudy
Partly cloudy
 20° /11° 48.5 mm 5
27 Sept. Mist
Mist
 20° /8° 0 mm 5
28 Sept. Mist
Mist
 22° /12° 0 mm 5
29 Sept. Mist
Mist
 23° /10° 0 mm 6
30 Sept. Mist
Mist
 22° /10° 0 mm 5
Next
Important Notice
Our weather forecast for Mont-Royal in September 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 Mont-Royal forecast closer to your planned date for the most up-to-date weather information.
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Mont-Royal in September - FAQ

What are the expected maximum and minimum temperatures in Mont-Royal during September?
Enjoy moderate daytime temperatures of up to 22° and cooler nights around 12°. Ideal for a range of outdoor activities, from hiking to city tours.

How much rainfall should be expected in Mont-Royal during September?
Significant rainfall exceeding 159.9 mm is expected in Mont-Royal during September, occurring over more than 15 days. Preparing for wet conditions is recommended in your planning.

What are the typical wind conditions in Mont-Royal during September?
The average wind speed in Mont-Royal during September is 14 km/h, suggesting breezy to windy conditions, depending on your activities.

September rainfall patterns in Mont-Royal

Explore the daily rainfall trends and prepare for Mont-Royals September weather 💧
Typically, Mont-Royal has 15 rainy days in September with a total of 159.9 mm of rainfall.

UV exposure in Mont-Royal during September

Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️

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Location coordinates Where is Mont-Royal?

Get accurate weather forecasts for Mont-Royal, located at latitude 45.517 and longitude -73.649. Stay updated with localized weather information tailored for Mont-Royal.

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