Gatineau
September
Weather in Gatineau for September 2025
Your guide to Gatineau weather in September - trends and predictions
In general, the average temperature in Gatineau 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, Gatineau 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
Gatineau 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 Gatineau
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 Gatineau 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 Gatineau forecast closer to your planned date for the most up-to-date weather information.
Gatineau in September - FAQ
What are the expected maximum and minimum temperatures in Gatineau 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 Gatineau during September?
Rainfall in Gatineau 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 Gatineau during September?
The average wind speed in Gatineau during September is 12 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Gatineau
Explore the daily rainfall trends and prepare for Gatineaus September weather 💧
UV exposure in Gatineau during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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