In December, Hartford typically sees daytime highs of 3.8°C and overnight lows around -6.4°C. Compared to the annual average high of 15.7°C, December runs -11.9°C.
December in Hartford averages a daytime high of 3.8°C and an overnight low of -6.4°C.
December runs -11.9°C compared to Hartford's annual average high of 15.7°C, ranking #10 of 12 months by warmth.
Plan for daytime highs near 3.8°C and cooler evenings around -6.4°C.