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Weather in Rimouski for September 2025

Your guide to Rimouski weather in September - trends and predictions

  • In general, the average temperature in Rimouski at the beginning of September is 19 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 13.7 °C by the end of September.

  • The climate of Rimouski in September is notably wet, with an average of 12 rainy days.

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Average dry days
18
Dry days
Average rainy days
12
Rainy days
Average snowy days
0
Snow days
Average temperatures
17°/10°
Temperatures
Average wind speed
16 km/h
Avg max wind
Average humidity
85 %
Avg humidity

Rimouski in September average weather

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

See the weather trend as well as the moving average line

September weather day by day

Click on a date for more information
August October
Date Weather Temperatures Rain UV More
1 Sept. Sunny
Sunny
 20° /9° 2.5 mm 5
2 Sept. Cloudy
Cloudy
 17° /9° 0.1 mm 4
3 Sept. Partly cloudy
Partly cloudy
 17° /10° 0 mm 5
4 Sept. Mist
Mist
 20° /12° 0 mm 5
5 Sept. Fog
Fog
 20° /13° 0 mm 6
6 Sept. Fog
Fog
 20° /13° 0 mm 6
7 Sept. Fog
Fog
 19° /12° 4.4 mm 5
8 Sept. Light rain shower
Light rain shower
 17° /11° 3.6 mm 4
9 Sept. Fog
Fog
 14° /9° 0.8 mm 4
10 Sept. Overcast
Overcast
 13° /9° 0.4 mm 3
11 Sept. Fog
Fog
 15° /9° 0.5 mm 4
12 Sept. Fog
Fog
 17° /10° 0 mm 5
13 Sept. Moderate rain
Moderate rain
 16° /11° 11.4 mm 4
14 Sept. Moderate rain
Moderate rain
 15° /9° 5.4 mm 4
15 Sept. Overcast
Overcast
 16° /9° 0 mm 4
16 Sept. Moderate rain
Moderate rain
 18° /12° 8.3 mm 5
17 Sept. Overcast
Overcast
 20° /14° 3.8 mm 5
18 Sept. Light rain shower
Light rain shower
 18° /12° 0.6 mm 5
19 Sept. Moderate rain
Moderate rain
 15° /11° 12.8 mm 4
20 Sept. Patchy rain possible
Patchy rain possible
 15° /9° 2.6 mm 4
21 Sept. Overcast
Overcast
 13° /7° 0 mm 3
22 Sept. Overcast
Overcast
 15° /6° 0 mm 4
23 Sept. Light rain
Light rain
 14° /7° 3.4 mm 4
24 Sept. Overcast
Overcast
 14° /7° 0 mm 4
25 Sept. Patchy rain possible
Patchy rain possible
 14° /7° 0 mm 3
26 Sept. Mist
Mist
 13° /8° 14.4 mm 3
27 Sept. Partly cloudy
Partly cloudy
 13° /9° 14.4 mm 4
28 Sept. Cloudy
Cloudy
 13° /8° 0 mm 4
29 Sept. Partly cloudy
Partly cloudy
 15° /8° 0 mm 4
30 Sept. Mist
Mist
 14° /6° 0 mm 4
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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.

Rimouski in September - FAQ

What are the expected maximum and minimum temperatures in Rimouski during September?
Enjoy moderate daytime temperatures of up to 17° and cooler nights around 10°. 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 109.4 mm is expected in Rimouski during September, occurring over more than 12 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 16 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 💧

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Location coordinates Where is Rimouski?

Get accurate weather forecasts for Rimouski, located at latitude 48.449 and longitude -68.524. Stay updated with localized weather information tailored for Rimouski.

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