In December, Perris typically sees daytime highs of 18.7°C and overnight lows around 3.0°C. Compared to the annual average high of 25.5°C, December runs -6.8°C.
December in Perris averages a daytime high of 18.7°C and an overnight low of 3.0°C.
December runs -6.8°C compared to Perris's annual average high of 25.5°C, ranking #11 of 12 months by warmth.
Plan for daytime highs near 18.7°C and cooler evenings around 3.0°C.