In January, Longueuil typically sees daytime highs of -5.8°C and overnight lows around -15.6°C. Compared to the annual average high of 10.8°C, January runs -16.6°C.
January in Longueuil averages a daytime high of -5.8°C and an overnight low of -15.6°C.
January runs -16.6°C compared to Longueuil's annual average high of 10.8°C, ranking #12 of 12 months by warmth.
Plan for daytime highs near -5.8°C and cooler evenings around -15.6°C.