In December, Union City typically sees daytime highs of 4.9°C and overnight lows around -3.9°C. Compared to the annual average high of 16.4°C, December runs -11.5°C.
December in Union City averages a daytime high of 4.9°C and an overnight low of -3.9°C.
December runs -11.5°C compared to Union City's annual average high of 16.4°C, ranking #10 of 12 months by warmth.
Plan for daytime highs near 4.9°C and cooler evenings around -3.9°C.