January in Gillingham averages a daily high of 8.5°C with nights around 2°C. Expect roughly 14.6 wet days totalling 66.3mm. A hard month to visit for comfort alone.
Across the year, the best time to visit Gillingham is May–September.
Based on WISLEY, UK (10.2km), 1995–2024. 27 years of January data.