January in Northampton averages a daily high of 7.9°C with nights around 1.4°C. Expect roughly 14.7 wet days totalling 50.8mm. 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 January data.