In September, Santiago typically sees daytime highs of 33.2°C and overnight lows around 22.8°C. Compared to the annual average high of 32.1°C, September runs +1.0°C.
September in Santiago averages a daytime high of 33.2°C and an overnight low of 22.8°C.
September runs +1.0°C compared to Santiago's annual average high of 32.1°C, ranking #6 of 12 months by warmth.
Plan for daytime highs near 33.2°C and cooler evenings around 22.8°C.