In September, Kaiyuan typically sees daytime highs of 24.0°C and overnight lows around 16.5°C. Compared to the annual average high of 21.8°C, September runs +2.2°C.
September in Kaiyuan averages a daytime high of 24.0°C and an overnight low of 16.5°C.
September runs +2.2°C compared to Kaiyuan's annual average high of 21.8°C, ranking #6 of 12 months by warmth.
Plan for daytime highs near 24.0°C and cooler evenings around 16.5°C.