June in Nampa averages a daily high of 27.8°C with nights around 12.5°C. Expect roughly 5.1 wet days totalling 17.4mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Nampa is June.
Based on BOISE AIR TERMINAL, ID US (26.2km), 1995–2024. 30 years of June data.