In December, Lowell typically sees daytime highs of 3.1°C and overnight lows around -6.7°C. Compared to the annual average high of 15.0°C, December runs -11.8°C.
December in Lowell averages a daytime high of 3.1°C and an overnight low of -6.7°C.
December runs -11.8°C compared to Lowell's annual average high of 15.0°C, ranking #10 of 12 months by warmth.
Plan for daytime highs near 3.1°C and cooler evenings around -6.7°C.