Outaouais (Gatineau)
September
Weather in Outaouais for September 2025
Your guide to Outaouais weather in September - trends and predictions
In general, the average temperature in Outaouais at the beginning of September is 25 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 20.6 °C by the end of September.
With an average of 5 rainy days, Outaouais experiences minimal rainfall in September.
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25
Dry days
5
Rainy days
0
Snow days
23°/10°
Temperatures
12 km/h
Avg max wind
72 %
Avg humidity
Outaouais in September average weather
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| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  23° | 2 22° | 3  25° | 4 27° | 5 28° | 6 28° | 7  22° |
| 8  15° | 9  21° | 10 21° | 11 24° | 12 24° | 13 21° | 14 21° |
| 15  24° | 16 25° | 17  25° | 18 23° | 19 24° | 20 21° | 21 21° |
| 22 22° | 23 20° | 24 22° | 25  18° | 26 21° | 27 20° | 28 20° |
| 29 21° | 30 22° |
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Temperatures trend during September in Outaouais
See the weather trend as well as the moving average line
September weather day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. | Overcast | 23° /10° | 3.5 mm | 6 | |
| 2 Sept. | Overcast | 22° /10° | 0 mm | 5 | |
| 3 Sept. | Mist | 25° /10° | 0 mm | 7 | |
| 4 Sept. | Overcast | 27° /13° | 0 mm | 7 | |
| 5 Sept. | Mist | 28° /14° | 0 mm | 7 | |
| 6 Sept. | Mist | 28° /14° | 0.2 mm | 6 | |
| 7 Sept. | Thundery outbreaks possible | 22° /11° | 7.6 mm | 5 | |
| 8 Sept. | Light rain | 15° /10° | 1.9 mm | 4 | |
| 9 Sept. | Cloudy | 21° /7° | 0 mm | 5 | |
| 10 Sept. | Overcast | 21° /8° | 0 mm | 5 | |
| 11 Sept. | Overcast | 24° /9° | 0 mm | 5 | |
| 12 Sept. | Fog | 24° /13° | 0.1 mm | 6 | |
| 13 Sept. | Mist | 21° /11° | 0.1 mm | 6 | |
| 14 Sept. | Mist | 21° /10° | 0 mm | 5 | |
| 15 Sept. | Partly cloudy | 24° /10° | 0 mm | 6 | |
| 16 Sept. | Partly cloudy | 25° /12° | 0 mm | 7 | |
| 17 Sept. | Patchy rain possible | 25° /12° | 0.4 mm | 6 | |
| 18 Sept. | Patchy light drizzle | 23° /12° | 0.8 mm | 5 | |
| 19 Sept. | Thundery outbreaks possible | 24° /13° | 0 mm | 6 | |
| 20 Sept. | Overcast | 21° /11° | 0 mm | 5 | |
| 21 Sept. | Mist | 21° /8° | 0 mm | 5 | |
| 22 Sept. | Overcast | 22° /9° | 0 mm | 6 | |
| 23 Sept. | Mist | 20° /10° | 3.8 mm | 5 | |
| 24 Sept. | Mist | 22° /11° | 0 mm | 5 | |
| 25 Sept. | Sunny | 18° /10° | 56.5 mm | 5 | |
| 26 Sept. | Sunny | 21° /10° | 1.9 mm | 6 | |
| 27 Sept. | Mist | 20° /9° | 0 mm | 5 | |
| 28 Sept. | Partly cloudy | 20° /9° | 0 mm | 5 | |
| 29 Sept. | Mist | 21° /10° | 0 mm | 5 | |
| 30 Sept. | Partly cloudy | 22° /12° | 0 mm | 6 | |
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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.
Outaouais in September - FAQ
What are the expected maximum and minimum temperatures in Outaouais during September?
Enjoy moderate daytime temperatures of up to 23° and cooler nights around 10°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Outaouais during September?
Rainfall in Outaouais during September is rare to nonexistent, with the total expected rainfall being less than 10 mm and approximately 5 days seeing any precipitation. Planning without the concern for rain is generally straightforward during this very dry period.
What are the typical wind conditions in Outaouais during September?
The average wind speed in Outaouais during September is 12 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 💧
UV exposure in Outaouais during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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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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