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Canada weather

Weather in Coquitlam for September 2026

Your guide to Coquitlam weather in September - trends and predictions

    Temperatures

  • Until now, September 2026 in Coquitlam is slightly cooler than the historical average by 0.7 °C.

  • Expect cooler weather in the next days in Coquitlam with the forecast suggesting a temperature of 21.5 °C, lower than the historical average.

  • In general, the average temperature in Coquitlam at the beginning of September is 23.7 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 16.1 °C by the end of September.

    • Rain 🌧️

  • The climate of Coquitlam in September is notably wet, with an average of 13 rainy days, and a total of 191.1 mm of precipitation.

    • More

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

Average dry days
17
Dry days
Average rainy days
13
Rainy days
Average snowy days
0
Snow days
Average temperatures
19°/12°
Temperatures
Average wind speed
9 km/h
Avg max wind
Average humidity
79 %
Avg humidity

Coquitlam Weather September

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

Temperatures trend during September in Coquitlam

See the weather trend as well as the moving average line

September weather in Coquitlam day by day

Click on a date for more information
August October
Date Weather Temperatures Rain UV More
1 Sept. Sunny
Sunny
 24° /13° 0 mm 6
2 Sept. Overcast
Overcast
 25° /14° 0.8 mm 5
3 Sept. Light rain shower
Light rain shower
 22° /14° 0.9 mm 4
4 Sept. Fog
Fog
 22° /13° 0.1 mm 5
5 Sept. Sunny
Sunny
 26° /14° 0 mm 6
6 Sept. Sunny
Sunny
 25° /13° 0 mm 6
7 Sept. Partly cloudy
Partly cloudy
 22° /12° 5.9 mm 6
8 Sept. Sunny
Sunny
 22° /12° 0 mm 5
9 Sept. Partly cloudy
Partly cloudy
 21° /12° 0.1 mm 4
10 Sept. Overcast
Overcast
 21° /13° 0 mm 4
11 Sept. Overcast
Overcast
 20° /10° 0 mm 3.4
12 Sept. Sunny
Sunny
 23° /10° 0 mm 4.1
13 Sept. Sunny
Sunny
 18° /9° 0.2 mm 1.8
14 Sept. Patchy rain possible
Patchy rain possible
 19° /11° 0.1 mm 2.6
15 Sept. Smoky haze
Smoky haze
 21° /10° 0 mm 6
16 Sept. Sunny
Sunny
 26° /11° 0 mm 7
17 Sept. Sunny
Sunny
 27° /14° 0 mm 7
18 Sept. Sunny
Sunny
 28° /14° 0 mm 7
19 Sept. Sunny
Sunny
 24° /14° 0 mm 6
20 Sept. Overcast
Overcast
 16° /13° 0.3 mm 4
21 Sept. Overcast
Overcast
 18° /10° 0 mm 5
22 Sept. Patchy rain possible
Patchy rain possible
 17° /8° 0.1 mm 5
23 Sept. Sunny
Sunny
 21° /7° 0 mm 6
24 Sept. Sunny
Sunny
 23° /9° 0 mm 6
25 Sept. Moderate or heavy rain with thunder
Moderate or heavy rain with thunder
 15° /10° 43.5 mm 4
26 Sept. Moderate or heavy rain with thunder
Moderate or heavy rain with thunder
 13° /9° 26.1 mm 3
27 Sept. Patchy rain possible
Patchy rain possible
 15° /8° 16.2 mm 3
28 Sept. Overcast
Overcast
 15° /9° 6.9 mm 4
29 Sept. Patchy rain possible
Patchy rain possible
 15° /8° 42.8 mm 4
30 Sept. Partly cloudy
Partly cloudy
 17° /7° 9.9 mm 4
Next
Important Notice
Our weather forecast for Coquitlam 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 Coquitlam forecast closer to your planned date for the most up-to-date weather information.
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Coquitlam in September - FAQ

What are the expected maximum and minimum temperatures in Coquitlam during September?
Enjoy moderate daytime temperatures of up to 19° and cooler nights around 12°. Ideal for a range of outdoor activities, from hiking to city tours.

How much rainfall should be expected in Coquitlam during September?
Significant rainfall exceeding 191.1 mm is expected in Coquitlam during September, occurring over more than 13 days. Preparing for wet conditions is recommended in your planning.

What are the typical wind conditions in Coquitlam during September?
The average wind speed in Coquitlam during September is 9 km/h, suggesting breezy to windy conditions, depending on your activities.

September rainfall patterns in Coquitlam

Explore the daily rainfall trends and prepare for Coquitlams September weather 💧
Typically, Coquitlam has 13 rainy days in September with a total of 191.1 mm of rainfall.

UV exposure in Coquitlam during September

Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️

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Get accurate weather forecasts for Coquitlam, located at latitude 49.285 and longitude -122.782. Stay updated with localized weather information tailored for Coquitlam.

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