In December, Northampton typically sees daytime highs of 6.6°C and overnight lows around 1.5°C. Compared to the annual average high of 12.8°C, December runs -6.2°C.
December in Northampton averages a daytime high of 6.6°C and an overnight low of 1.5°C.
December runs -6.2°C compared to Northampton's annual average high of 12.8°C, ranking #10 of 12 months by warmth.
Plan for daytime highs near 6.6°C and cooler evenings around 1.5°C.