In September, Port Saint Lucie typically sees daytime highs of 31.2°C and overnight lows around 22.7°C. Compared to the annual average high of 27.8°C, September runs +3.4°C.
September in Port Saint Lucie averages a daytime high of 31.2°C and an overnight low of 22.7°C.
September runs +3.4°C compared to Port Saint Lucie's annual average high of 27.8°C, ranking #3 of 12 months by warmth.
Plan for daytime highs near 31.2°C and cooler evenings around 22.7°C.