Rimouski
September
Weather in Rimouski for September 2026
Your guide to Rimouski weather in September - trends and predictions
In general, the average temperature in Rimouski at the beginning of September is 18.7 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 13.4 °C by the end of September.
With an average of 5 rainy days, Rimouski experiences minimal rainfall in September.
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Temperatures
Rain 🌧️
More
25
Dry days
5
Rainy days
0
Snow days
18°/8°
Temperatures
18 km/h
Avg max wind
84 %
Avg humidity
Rimouski Weather September
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Temperatures trend during September in Rimouski
See the weather trend as well as the moving average line
September weather in Rimouski day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. |  Sunny | 20° /10° | 1.6 mm | 5 | |
| 2 Sept. |  Cloudy | 18° /11° | 0 mm | 4 | |
| 3 Sept. |  Partly cloudy | 17° /12° | 0 mm | 4 | |
| 4 Sept. | Partly cloudy | 20° /12° | 0 mm | 5 | |
| 5 Sept. |  Fog | 20° /13° | 0 mm | 5 | |
| 6 Sept. | Fog | 19° /12° | 6.8 mm | 5 | |
| 7 Sept. | Fog | 17° /11° | 5.5 mm | 4 | |
| 8 Sept. |  Light rain shower | 16° /10° | 2.4 mm | 4 | |
| 9 Sept. | Fog | 15° /9° | 0.5 mm | 4 | |
| 10 Sept. |  Overcast | 15° /9° | 0.2 mm | 3 | |
| 11 Sept. | Fog | 15° /9° | 0.4 mm | 4 | |
| 12 Sept. | Partly cloudy | 16° /9° | 0 mm | 4 | |
| 13 Sept. |  Moderate rain | 16° /10° | 7.6 mm | 4 | |
| 14 Sept. | Moderate rain | 15° /9° | 4.1 mm | 3 | |
| 15 Sept. | Overcast | 16° /9° | 0 mm | 4 | |
| 16 Sept. | Partly cloudy | 18° /11° | 5.5 mm | 5 | |
| 17 Sept. | Overcast | 20° /13° | 2.6 mm | 5 | |
| 18 Sept. | Light rain shower | 19° /12° | 1.8 mm | 4 | |
| 19 Sept. | Moderate rain | 14° /9° | 8.5 mm | 3 | |
| 20 Sept. | Patchy rain possible | 14° /7° | 1.7 mm | 4 | |
| 21 Sept. | Overcast | 13° /7° | 0 mm | 3 | |
| 22 Sept. | Overcast | 15° /7° | 2.3 mm | 3 | |
| 23 Sept. |  Light rain | 14° /8° | 3.3 mm | 3 | |
| 24 Sept. | Overcast | 13° /7° | 0 mm | 3 | |
| 25 Sept. | Patchy rain possible | 13° /7° | 7.1 mm | 3 | |
| 26 Sept. | Mist | 14° /8° | 17.9 mm | 3 | |
| 27 Sept. | Partly cloudy | 13° /8° | 9.6 mm | 4 | |
| 28 Sept. | Cloudy | 14° /7° | 0 mm | 4 | |
| 29 Sept. | Partly cloudy | 15° /8° | 0 mm | 4 | |
| 30 Sept. | Mist | 12° /7° | 0 mm | 3 | |
| Next | |||||
Important Notice
Our weather forecast for Rimouski 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 Rimouski forecast closer to your planned date for the most up-to-date weather information.
Change Month
Rimouski in September - FAQ
What are the expected maximum and minimum temperatures in Rimouski during September?
Enjoy moderate daytime temperatures of up to 18° and cooler nights around 8°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Rimouski during September?
Significant rainfall exceeding 206.7 mm is expected in Rimouski during September, occurring over more than 5 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Rimouski during September?
The average wind speed in Rimouski during September is 18 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Rimouski
Explore the daily rainfall trends and prepare for Rimouskis September weather 💧
Typically, Rimouski has 5 rainy days in September with a total of 206.7 mm of rainfall.
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