In September, Ushuaia typically sees daytime highs of 6.7°C and overnight lows around -0.3°C. Compared to the annual average high of 8.5°C, September runs -1.8°C.
September in Ushuaia averages a daytime high of 6.7°C and an overnight low of -0.3°C.
September runs -1.8°C compared to Ushuaia's annual average high of 8.5°C, ranking #8 of 12 months by warmth.
Plan for daytime highs near 6.7°C and cooler evenings around -0.3°C.