September in Lelystad averages a daily high of 19.5°C with nights around 10.4°C. Expect roughly 12.7 wet days totalling 69.5mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Lelystad is May–September.
Based on LELYSTAD, NL (6.5km), 1995–2024. 30 years of September data.