In September, Ust'-Ilimsk typically sees daytime highs of 13.1°C and overnight lows around 2.4°C. Compared to the annual average high of 2.7°C, September runs +10.5°C.
September in Ust'-Ilimsk averages a daytime high of 13.1°C and an overnight low of 2.4°C.
September runs +10.5°C compared to Ust'-Ilimsk's annual average high of 2.7°C, ranking #4 of 12 months by warmth.
Plan for daytime highs near 13.1°C and cooler evenings around 2.4°C.