In September, Saint-Jerome typically sees daytime highs of 18.0°C and overnight lows around 6.8°C. Compared to the annual average high of 9.2°C, September runs +8.8°C.
September in Saint-Jerome averages a daytime high of 18.0°C and an overnight low of 6.8°C.
September runs +8.8°C compared to Saint-Jerome's annual average high of 9.2°C, ranking #4 of 12 months by warmth.
Plan for daytime highs near 18.0°C and cooler evenings around 6.8°C.