In September, Colombo typically sees daytime highs of 21.4°C and overnight lows around 11.2°C. Compared to the annual average high of 22.9°C, September runs -1.5°C.
September in Colombo averages a daytime high of 21.4°C and an overnight low of 11.2°C.
September runs -1.5°C compared to Colombo's annual average high of 22.9°C, ranking #8 of 12 months by warmth.
Plan for daytime highs near 21.4°C and cooler evenings around 11.2°C.