In September, Thanh Pho Lang Son typically sees daytime highs of 30.0°C and overnight lows around 21.6°C. Compared to the annual average high of 25.6°C, September runs +4.3°C.
September in Thanh Pho Lang Son averages a daytime high of 30.0°C and an overnight low of 21.6°C.
September runs +4.3°C compared to Thanh Pho Lang Son's annual average high of 25.6°C, ranking #5 of 12 months by warmth.
Plan for daytime highs near 30.0°C and cooler evenings around 21.6°C.