April in Caldwell averages a daily high of 17.8°C with nights around 1.9°C. Expect roughly 5.9 wet days totalling 19.1mm. 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. 18 years of April data.