In September, Chetumal typically sees daytime highs of 32.5°C and overnight lows around 22.4°C. Compared to the annual average high of 31.3°C, September runs +1.2°C.
September in Chetumal averages a daytime high of 32.5°C and an overnight low of 22.4°C.
September runs +1.2°C compared to Chetumal's annual average high of 31.3°C, ranking #4 of 12 months by warmth.
Plan for daytime highs near 32.5°C and cooler evenings around 22.4°C.