In September, Portmore typically sees daytime highs of 31.9°C and overnight lows around 23.9°C. Compared to the annual average high of 30.9°C, September runs +1.0°C.
September in Portmore averages a daytime high of 31.9°C and an overnight low of 23.9°C.
September runs +1.0°C compared to Portmore's annual average high of 30.9°C, ranking #3 of 12 months by warmth.
Plan for daytime highs near 31.9°C and cooler evenings around 23.9°C.