In December, Mission typically sees daytime highs of 22.1°C and overnight lows around 9.7°C. Compared to the annual average high of 29.4°C, December runs -7.4°C.
December in Mission averages a daytime high of 22.1°C and an overnight low of 9.7°C.
December runs -7.4°C compared to Mission's annual average high of 29.4°C, ranking #11 of 12 months by warmth.
Plan for daytime highs near 22.1°C and cooler evenings around 9.7°C.