In September, Negombo typically sees daytime highs of 30.0°C and overnight lows around 24.4°C. Compared to the annual average high of 30.7°C, September runs -0.6°C.
September in Negombo averages a daytime high of 30.0°C and an overnight low of 24.4°C.
September runs -0.6°C compared to Negombo's annual average high of 30.7°C, ranking #9 of 12 months by warmth.
Plan for daytime highs near 30.0°C and cooler evenings around 24.4°C.