In December, Brentwood typically sees daytime highs of 5.3°C and overnight lows around -2.5°C. Compared to the annual average high of 15.1°C, December runs -9.8°C.
December in Brentwood averages a daytime high of 5.3°C and an overnight low of -2.5°C.
December runs -9.8°C compared to Brentwood's annual average high of 15.1°C, ranking #10 of 12 months by warmth.
Plan for daytime highs near 5.3°C and cooler evenings around -2.5°C.