Boise

What is the climate like in Boise?

The best time to visit Boise is typically May – October, with trip comfort peaking in July (8.9/10). Boise is warmest in July, when daily highs average 96°F (36°C), and coolest in January, when lows fall to about 28°F (-2°C). The wettest month is typically December and the driest is July; the year sees roughly 14 in (354 mm) of precipitation.

• Best time to visitMay – October — comfort peaks in July (8.9/10)
• Warmest monthJuly — average high 96°F (36°C)
• Coolest monthJanuary — average low 28°F (-2°C)
• Wettest monthDecember (2.1 in (54 mm))
• Driest monthJuly (0.1 in (2 mm))
• Annual precipitation14 in (354 mm)
• Based on2016-2025 daily ERA5 reanalysis data (10-year normals)
• Records fromBoise Air Terminal, 6 km away (1940-2026)