In January, Brentwood typically sees daytime highs of 12.8°C and overnight lows around 3.5°C. Compared to the annual average high of 22.6°C, January runs -9.8°C.
January in Brentwood averages a daytime high of 12.8°C and an overnight low of 3.5°C.
January runs -9.8°C compared to Brentwood's annual average high of 22.6°C, ranking #12 of 12 months by warmth.
Plan for daytime highs near 12.8°C and cooler evenings around 3.5°C.