The temperatures in Coquitlam in September are quite cold with temperatures between 9°C and 17°C, warm clothes are a must.
You can expect rain for roughly half of the month of September in Coquitlam. We’re expecting roughly 8 to 15 days of rain, so your rubber boots and umbrella are going to see plenty of use this month if you’re keen on staying dry.
Our weather forecast can give you a great sense of what weather to expect in Coquitlam in September 2025.
If you’re planning to visit Coquitlam in the near future, we highly recommend that you review the 14 day weather forecast for Coquitlam before you arrive.
Temperatures
17° / 9°
Rainy Days
8
Snowy Days
0
Dry Days
22
Rainfall
215
mm
Sun Hours
9.4
Hrs
