In December, Tallinn typically sees daytime highs of -1.3°C and overnight lows around -5.1°C. Compared to the annual average high of 8.1°C, December runs -9.4°C.
December in Tallinn averages a daytime high of -1.3°C and an overnight low of -5.1°C.
December runs -9.4°C compared to Tallinn's annual average high of 8.1°C, ranking #10 of 12 months by warmth.
Plan for daytime highs near -1.3°C and cooler evenings around -5.1°C.