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Canada weather

Weather in Coquitlam for September 2025

Your guide to Coquitlam weather in September - trends and predictions

    Official Weather Alert ⚠️

  • Air Quality Warning - See hour by hour.

    • Temperatures

  • Until now, September 2025 in Coquitlam has been nearly identical to the historical average, with a temperature of 21.8 °C (showing only a slight deviation of -0.3 °C).

  • Expect cooler weather in the next days in Coquitlam with the forecast suggesting a temperature of 19.4 °C, lower than the historical average.

  • In general, the average temperature in Coquitlam at the beginning of September is 24.3 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 14.1 °C by the end of September.

    • Rain 🌧️

  • The climate of Coquitlam in September is notably wet, with an average of 11 rainy days, and a total of 156 mm of precipitation.

    • More

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

Average dry days
19
Dry days
Average rainy days
11
Rainy days
Average snowy days
0
Snow days
Average temperatures
19°/11°
Temperatures
Average wind speed
9 km/h
Avg max wind
Average humidity
77 %
Avg humidity

Coquitlam Weather September

Move between months or click on a day
August
October
Sun.Mon.Tue.Wed.Thu.Fri.Sat.
1
Sunny
25°
2
Overcast
26°
3
Light rain shower
22°
4
Fog
23°
5
Sunny
27°
6
Partly cloudy
25°
7
Partly cloudy
22°
8
Partly cloudy
21°
9
Partly cloudy
20°
10
Overcast
20°
11
Patchy rain possible
17°
12
Mist
16°
13
Fog
18°
14
Weather Alert Overcast
18°
15
Weather Alert Mist
20°
16
Sunny
31°
17
Sunny
25°
18
Sunny
23°
19
Sunny
26°
20
Sunny
23°
21
Moderate rain
14°
22
Patchy rain possible
17°
23
Patchy rain possible
18°
24
Moderate rain
14°
25
Moderate rain
15°
26
Patchy rain possible
15°
27
Patchy rain possible
12°
28
Light rain shower
13°
29
Patchy rain possible
14°
30
Partly cloudy
16°

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
 25° /13° 0 mm 6
2 Sept. Overcast
Overcast
 26° /14° 0 mm 6
3 Sept. Light rain shower
Light rain shower
 22° /15° 0.6 mm 5
4 Sept. Fog
Fog
 23° /14° 0.1 mm 6
5 Sept. Sunny
Sunny
 27° /15° 0 mm 6
6 Sept. Partly cloudy
Partly cloudy
 25° /14° 0 mm 6
7 Sept. Partly cloudy
Partly cloudy
 22° /13° 7.8 mm 6
8 Sept. Partly cloudy
Partly cloudy
 21° /13° 0 mm 5
9 Sept. Partly cloudy
Partly cloudy
 20° /13° 0.1 mm 5
10 Sept. Overcast
Overcast
 20° /13° 0 mm 4
11 Sept. Patchy rain possible
Patchy rain possible
 17° /11° 0.1 mm 4
12 Sept. Mist
Mist
 16° /11° 0 mm 4
13 Sept. Fog
Fog
 18° /12° 0.7 mm 4
14 Sept. Overcast
Overcast
 18° /12° 0 mm 0.3
15 Sept. Mist
Mist
 20° /10° 0 mm 1.1
16 Sept. Sunny
Sunny
 31° /14° 0 mm 1.2
17 Sept. Sunny
Sunny
 25° /13° 0 mm 1
18 Sept. Sunny
Sunny
 23° /11° 0 mm 0
19 Sept. Sunny
Sunny
 26° /13° 0 mm 5
20 Sept. Sunny
Sunny
 23° /13° 0 mm 5
21 Sept. Moderate rain
Moderate rain
 14° /12° 7.4 mm 3
22 Sept. Patchy rain possible
Patchy rain possible
 17° /10° 1.2 mm 3
23 Sept. Patchy rain possible
Patchy rain possible
 18° /11° 4.5 mm 3
24 Sept. Moderate rain
Moderate rain
 14° /11° 13.7 mm 3
25 Sept. Moderate rain
Moderate rain
 15° /9° 6.5 mm 3
26 Sept. Patchy rain possible
Patchy rain possible
 15° /8° 0.8 mm 3
27 Sept. Patchy rain possible
Patchy rain possible
 12° /9° 4.9 mm 2
28 Sept. Light rain shower
Light rain shower
 13° /7° 10.4 mm 4
29 Sept. Patchy rain possible
Patchy rain possible
 14° /6° 0 mm 4
30 Sept. Partly cloudy
Partly cloudy
 16° /5° 0 mm 5
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 11°. 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 156 mm is expected in Coquitlam during September, occurring over more than 11 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 💧

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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