May in Alameda averages a daily high of 20.3°C with nights around 11.7°C. Expect roughly 3.3 wet days totalling 19mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Alameda is May–October.
Based on OAKLAND MUSEUM, CA US (3.1km), 1995–2024. 26 years of May data.