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Weather in Outaouais for September 2026

Your guide to Outaouais weather in September - trends and predictions

    Temperatures

  • Until now, September 2026 in Outaouais has been nearly identical to the historical average, with a temperature of 23.1 °C (showing only a slight deviation of 0.2 °C).

  • Expect cooler weather in the next days in Outaouais with the forecast suggesting a temperature of 18.9 °C, lower than the historical average.

  • In general, the average temperature in Outaouais at the beginning of September is 24.3 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 20.4 °C by the end of September.

    • Rain 🌧️

  • Outaouais experiences moderate rainfall in September, with an average of 7 rainy days and a total precipitation of 76.5 mm.

    • More

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

Average dry days
23
Dry days
Average rainy days
7
Rainy days
Average snowy days
0
Snow days
Average temperatures
22°/11°
Temperatures
Average wind speed
13 km/h
Avg max wind
Average humidity
72 %
Avg humidity

Outaouais Weather September

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

Temperatures trend during September in Outaouais

See the weather trend as well as the moving average line

September weather in Outaouais day by day

Click on a date for more information
August October
Date Weather Temperatures Rain UV More
1 Sept. Overcast
Overcast
 23° /12° 56.2 mm 5
2 Sept. Overcast
Overcast
 24° /13° 3.3 mm 5
3 Sept. Sunny
Sunny
 26° /13° 12.7 mm 7
4 Sept. Sunny
Sunny
 26° /13° 1.4 mm 6
5 Sept. Mist
Mist
 25° /12° 0.1 mm 6
6 Sept. Overcast
Overcast
 24° /13° 0.1 mm 6
7 Sept. Thundery outbreaks possible
Thundery outbreaks possible
 22° /11° 3.8 mm 5
8 Sept. Light rain
Light rain
 18° /11° 12.6 mm 4
9 Sept. Cloudy
Cloudy
 22° /9° 4.6 mm 4
10 Sept. Overcast
Overcast
 23° /9° 0 mm 6
11 Sept. Sunny
Sunny
 21° /9° 0 mm 5.3
12 Sept. Overcast
Overcast
 22° /10° 0 mm 5.1
13 Sept. Fog
Fog
 24° /15° 2 mm 4.4
14 Sept. Sunny
Sunny
 17° /8° 0 mm 5
15 Sept. Overcast
Overcast
 16° /6° 3.3 mm 4
16 Sept. Patchy rain possible
Patchy rain possible
 21° /13° 5 mm 5
17 Sept. Overcast
Overcast
 18° /13° 0 mm 4
18 Sept. Patchy rain possible
Patchy rain possible
 18° /10° 0.3 mm 5
19 Sept. Sunny
Sunny
 18° /8° 0 mm 4
20 Sept. Sunny
Sunny
 19° /8° 0 mm 5
21 Sept. Sunny
Sunny
 20° /10° 0 mm 6
22 Sept. Overcast
Overcast
 19° /11° 0.2 mm 4
23 Sept. Overcast
Overcast
 14° /10° 0 mm 4
24 Sept. Sunny
Sunny
 18° /9° 0 mm 5
25 Sept. Heavy rain
Heavy rain
 18° /11° 61.1 mm 4
26 Sept. Sunny
Sunny
 21° /11° 1.3 mm 5
27 Sept. Cloudy
Cloudy
 20° /9° 0 mm 4
28 Sept. Partly cloudy
Partly cloudy
 22° /10° 0 mm 5
29 Sept. Mist
Mist
 23° /10° 0 mm 5
30 Sept. Partly cloudy
Partly cloudy
 21° /11° 0 mm 5
Next
Important Notice
Our weather forecast for Outaouais 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 Outaouais forecast closer to your planned date for the most up-to-date weather information.
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Outaouais in September - FAQ

What are the expected maximum and minimum temperatures in Outaouais during September?
Enjoy moderate daytime temperatures of up to 22° and cooler nights around 11°. Ideal for a range of outdoor activities, from hiking to city tours.

How much rainfall should be expected in Outaouais during September?
Moderate rainfall is anticipated in Outaouais during September, with a total of 76.5 mm spread over approximately 7 days. Considering plans for rainy days is advisable.

What are the typical wind conditions in Outaouais during September?
The average wind speed in Outaouais during September is 13 km/h, suggesting breezy to windy conditions, depending on your activities.

September rainfall patterns in Outaouais

Explore the daily rainfall trends and prepare for Outaouaiss September weather 💧
Typically, Outaouais has 7 rainy days in September with a total of 76.5 mm of rainfall.

UV exposure in Outaouais during September

Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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Location coordinates Where is Outaouais?

Get accurate weather forecasts for Outaouais, located at latitude 45.477 and longitude -75.702. Stay updated with localized weather information tailored for Outaouais.

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