August in Speyer averages a daily high of 26.7°C with nights around 15°C. Expect roughly 11.4 wet days totalling 59.1mm. 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 August data.