May in Caldwell averages a daily high of 22.5°C with nights around 7.4°C. Expect roughly 4.9 wet days totalling 29mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Caldwell is May–June.
Based on HOMEDALE 1 SE, ID US (19.9km), 1995–2024. 16 years of May data.