In December, Santa Maria typically sees daytime highs of 18.6°C and overnight lows around 4.7°C. Compared to the annual average high of 21.6°C, December runs -3.0°C.
December in Santa Maria averages a daytime high of 18.6°C and an overnight low of 4.7°C.
December runs -3.0°C compared to Santa Maria's annual average high of 21.6°C, ranking #10 of 12 months by warmth.
Plan for daytime highs near 18.6°C and cooler evenings around 4.7°C.