December in Northampton averages a daily high of 8.2°C with nights around 1.8°C. Expect roughly 15.3 wet days totalling 59mm. A hard month to visit for comfort alone.
Across the year, the best time to visit Northampton is June–September.
Based on WELLESBOURNE, UK (49.3km), 1995–2024. 29 years of December data.