May in Livermore averages a daily high of 25.3°C with nights around 10.1°C. Expect roughly 3.2 wet days totalling 11.7mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Livermore is April–June.
Based on LIVERMORE, CA US (1.5km), 1995–2024. 30 years of May data.