In December, Mesa typically sees daytime highs of 18.9°C and overnight lows around 3.8°C. Compared to the annual average high of 29.8°C, December runs -10.9°C.
December in Mesa averages a daytime high of 18.9°C and an overnight low of 3.8°C.
December runs -10.9°C compared to Mesa's annual average high of 29.8°C, ranking #11 of 12 months by warmth.
Plan for daytime highs near 18.9°C and cooler evenings around 3.8°C.