September in Lincoln averages a daily high of 18.4°C with nights around 10.5°C. Expect roughly 12 wet days totalling 55.3mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Lincoln is June–September.
Based on NOTTINGHAM WATNALL, UK (53.5km), 1995–2024. 30 years of September data.