In December, Amarillo typically sees daytime highs of 11.4°C and overnight lows around -4.2°C. Compared to the annual average high of 21.9°C, December runs -10.5°C.
December in Amarillo averages a daytime high of 11.4°C and an overnight low of -4.2°C.
December runs -10.5°C compared to Amarillo's annual average high of 21.9°C, ranking #11 of 12 months by warmth.
Plan for daytime highs near 11.4°C and cooler evenings around -4.2°C.