October in Gronau averages a daily high of 14.9°C with nights around 6.6°C. Expect roughly 14.4 wet days totalling 68.2mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Gronau is May–September.
Based on TWENTHE, NL (11.3km), 1995–2024. 30 years of October data.