In September, Saint Croix typically sees daytime highs of 30.5°C and overnight lows around 24.8°C. Compared to the annual average high of 29.2°C, September runs +1.3°C.
September in Saint Croix averages a daytime high of 30.5°C and an overnight low of 24.8°C.
September runs +1.3°C compared to Saint Croix's annual average high of 29.2°C, ranking #1 of 12 months by warmth.
Plan for daytime highs near 30.5°C and cooler evenings around 24.8°C.