In December, Rijeka typically sees daytime highs of 7.0°C and overnight lows around -0.7°C. Compared to the annual average high of 16.0°C, December runs -8.9°C.
December in Rijeka averages a daytime high of 7.0°C and an overnight low of -0.7°C.
December runs -8.9°C compared to Rijeka's annual average high of 16.0°C, ranking #11 of 12 months by warmth.
Plan for daytime highs near 7.0°C and cooler evenings around -0.7°C.