In September, Coquitlam typically sees daytime highs of 17.7°C and overnight lows around 8.5°C. Compared to the annual average high of 11.6°C, September runs +6.1°C.
September in Coquitlam averages a daytime high of 17.7°C and an overnight low of 8.5°C.
September runs +6.1°C compared to Coquitlam's annual average high of 11.6°C, ranking #4 of 12 months by warmth.
Plan for daytime highs near 17.7°C and cooler evenings around 8.5°C.