In January, Trondheim typically sees daytime highs of -1.4°C and overnight lows around -8.6°C. Compared to the annual average high of 8.4°C, January runs -9.7°C.
January in Trondheim averages a daytime high of -1.4°C and an overnight low of -8.6°C.
January runs -9.7°C compared to Trondheim's annual average high of 8.4°C, ranking #12 of 12 months by warmth.
Plan for daytime highs near -1.4°C and cooler evenings around -8.6°C.