In September, Little Cayman typically sees daytime highs of 31.3°C and overnight lows around 25.3°C. Compared to the annual average high of 29.7°C, September runs +1.6°C.
September in Little Cayman averages a daytime high of 31.3°C and an overnight low of 25.3°C.
September runs +1.6°C compared to Little Cayman's annual average high of 29.7°C, ranking #2 of 12 months by warmth.
Plan for daytime highs near 31.3°C and cooler evenings around 25.3°C.