In December, Rock Hill typically sees daytime highs of 12.2°C and overnight lows around -0.0°C. Compared to the annual average high of 22.1°C, December runs -9.9°C.
December in Rock Hill averages a daytime high of 12.2°C and an overnight low of -0.0°C.
December runs -9.9°C compared to Rock Hill's annual average high of 22.1°C, ranking #11 of 12 months by warmth.
Plan for daytime highs near 12.2°C and cooler evenings around -0.0°C.