In September, Biysk typically sees daytime highs of 18.3°C and overnight lows around 4.9°C. Compared to the annual average high of 7.6°C, September runs +10.8°C.
September in Biysk averages a daytime high of 18.3°C and an overnight low of 4.9°C.
September runs +10.8°C compared to Biysk's annual average high of 7.6°C, ranking #5 of 12 months by warmth.
Plan for daytime highs near 18.3°C and cooler evenings around 4.9°C.