In September, Formosa typically sees daytime highs of 29.9°C and overnight lows around 16.7°C. Compared to the annual average high of 27.7°C, September runs +2.2°C.
September in Formosa averages a daytime high of 29.9°C and an overnight low of 16.7°C.
September runs +2.2°C compared to Formosa's annual average high of 27.7°C, ranking #1 of 12 months by warmth.
Plan for daytime highs near 29.9°C and cooler evenings around 16.7°C.