In December, Irkutsk typically sees daytime highs of -13.3°C and overnight lows around -23.3°C. Compared to the annual average high of 5.5°C, December runs -18.9°C.
December in Irkutsk averages a daytime high of -13.3°C and an overnight low of -23.3°C.
December runs -18.9°C compared to Irkutsk's annual average high of 5.5°C, ranking #11 of 12 months by warmth.
Plan for daytime highs near -13.3°C and cooler evenings around -23.3°C.