Idaho Falls

What is the climate like in Idaho Falls?

The best time to visit Idaho Falls is typically June – September, with trip comfort peaking in July (8.9/10). Idaho Falls is warmest in July, when daily highs average 89°F (32°C), and coolest in January, when lows fall to about 17°F (-8°C). The wettest month is typically May and the driest is July; the year sees roughly 18 in (449 mm) of precipitation.

• Best time to visitJune – September — comfort peaks in July (8.9/10)
• Warmest monthJuly — average high 89°F (32°C)
• Coolest monthJanuary — average low 17°F (-8°C)
• Wettest monthMay (2.1 in (54 mm))
• Driest monthJuly (0.4 in (9 mm))
• Annual precipitation18 in (449 mm)
• Based on2016-2025 daily ERA5 reanalysis data (10-year normals)
• Records fromIdaho Falls Faa AP, 7 km away (1948-2026)