In July, Longueuil typically sees daytime highs of 26.0°C and overnight lows around 14.8°C. Compared to the annual average high of 10.8°C, July runs +15.2°C.
July in Longueuil averages a daytime high of 26.0°C and an overnight low of 14.8°C.
July runs +15.2°C compared to Longueuil's annual average high of 10.8°C, ranking #1 of 12 months by warmth.
Plan for daytime highs near 26.0°C and cooler evenings around 14.8°C.