In September, Ulan Bator typically sees daytime highs of 14.6°C and overnight lows around -0.2°C. Compared to the annual average high of 4.1°C, September runs +10.5°C.
September in Ulan Bator averages a daytime high of 14.6°C and an overnight low of -0.2°C.
September runs +10.5°C compared to Ulan Bator's annual average high of 4.1°C, ranking #5 of 12 months by warmth.
Plan for daytime highs near 14.6°C and cooler evenings around -0.2°C.