In September, Barnaul typically sees daytime highs of 17.5°C and overnight lows around 4.7°C. Compared to the annual average high of 6.8°C, September runs +10.7°C.
September in Barnaul averages a daytime high of 17.5°C and an overnight low of 4.7°C.
September runs +10.7°C compared to Barnaul's annual average high of 6.8°C, ranking #5 of 12 months by warmth.
Plan for daytime highs near 17.5°C and cooler evenings around 4.7°C.