September in Speyer averages a daily high of 22°C with nights around 10.9°C. Expect roughly 9.9 wet days totalling 53.8mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Speyer is May–September.
Based on WAGHAUSEL KIRRLACH, GM (11.4km), 1995–2024. 30 years of September data.