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Weather in Mont-Royal for September 2025

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

    Temperatures

  • Until now, September 2025 in Mont-Royal is slightly cooler than the historical average by -0.6 °C.

  • Expect cooler weather in the next days in Mont-Royal with the forecast suggesting a temperature of 21.2 °C, lower than the historical average.

  • In general, the average temperature in Mont-Royal at the beginning of September is 24.9 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 18.4 °C by the end of September.

    • Rain 🌧️

  • With an average of 3 rainy days, Mont-Royal experiences minimal rainfall in September.

    • More

  • New! Chat with our AI weatherman - it’s amazing and free.

Average dry days
27
Dry days
Average rainy days
3
Rainy days
Average snowy days
0
Snow days
Average temperatures
25°/10°
Temperatures
Average wind speed
14 km/h
Avg max wind
Average humidity
73 %
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
25°
2
Mist
23°
3
Mist
25°
4
Mist
27°
5
Mist
27°
6
Mist
25°
7
Patchy light rain with thunder
22°
8
Light rain shower
20°
9
Cloudy
21°
10
Heavy rain
22°
11
Overcast
22°
12
Overcast
23°
13
Moderate rain
20°
14
Partly cloudy
24°
15
Sunny
25°
16
Sunny
24°
17
Partly cloudy
26°
18
Patchy rain possible
29°
19
Patchy rain possible
17°
20
Sunny
18°
21
Sunny
23°
22
Sunny
26°
23
Patchy rain possible
22°
24
Patchy rain possible
17°
25
Partly cloudy
21°
26
Sunny
12°
27
Sunny
13°
28
Mist
21°
29
Mist
21°
30
Mist
24°

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
 25° /12° 2.1 mm 5
2 Sept. Mist
Mist
 23° /13° 0 mm 5
3 Sept. Mist
Mist
 25° /14° 0 mm 6
4 Sept. Mist
Mist
 27° /15° 8.2 mm 6
5 Sept. Mist
Mist
 27° /15° 6.9 mm 6
6 Sept. Mist
Mist
 25° /16° 9.6 mm 6
7 Sept. Patchy light rain with thunder
Patchy light rain with thunder
 22° /13° 7.7 mm 5
8 Sept. Light rain shower
Light rain shower
 20° /11° 13.9 mm 5
9 Sept. Cloudy
Cloudy
 21° /8° 0 mm 5
10 Sept. Heavy rain
Heavy rain
 22° /11° 3.2 mm 5
11 Sept. Overcast
Overcast
 22° /12° 1.8 mm 5
12 Sept. Overcast
Overcast
 23° /12° 1 mm 5
13 Sept. Moderate rain
Moderate rain
 20° /13° 5.1 mm 5
14 Sept. Partly cloudy
Partly cloudy
 24° /14° 0 mm 0.8
15 Sept. Sunny
Sunny
 25° /13° 0 mm 1.1
16 Sept. Sunny
Sunny
 24° /12° 0 mm 1.2
17 Sept. Partly cloudy
Partly cloudy
 26° /13° 0 mm 1.2
18 Sept. Patchy rain possible
Patchy rain possible
 29° /16° 3.1 mm 0
19 Sept. Patchy rain possible
Patchy rain possible
 17° /11° 0.7 mm 3
20 Sept. Sunny
Sunny
 18° /8° 0 mm 4
21 Sept. Sunny
Sunny
 23° /9° 0 mm 5
22 Sept. Sunny
Sunny
 26° /14° 0 mm 5
23 Sept. Patchy rain possible
Patchy rain possible
 22° /16° 0.4 mm 4
24 Sept. Patchy rain possible
Patchy rain possible
 17° /15° 4.8 mm 4
25 Sept. Partly cloudy
Partly cloudy
 21° /12° 0 mm 5
26 Sept. Sunny
Sunny
 12° /6° 0 mm 3
27 Sept. Sunny
Sunny
 13° /5° 0 mm 3
28 Sept. Mist
Mist
 21° /11° 0 mm 5
29 Sept. Mist
Mist
 21° /10° 0 mm 5
30 Sept. Mist
Mist
 24° /10° 0 mm 6
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 25° and cooler nights around 10°. 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 378.6 mm is expected in Mont-Royal during September, occurring over more than 3 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 💧

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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