In October, Longueuil typically sees daytime highs of 13.0°C and overnight lows around 3.5°C. Compared to the annual average high of 10.8°C, October runs +2.2°C.
October in Longueuil averages a daytime high of 13.0°C and an overnight low of 3.5°C.
October runs +2.2°C compared to Longueuil's annual average high of 10.8°C, ranking #6 of 12 months by warmth.
Plan for daytime highs near 13.0°C and cooler evenings around 3.5°C.