Great Falls

What is the climate like in Great Falls?

The best time to visit Great Falls is typically June – September, with trip comfort peaking in July (8.6/10). Great Falls is warmest in July, when daily highs average 88°F (31°C), and coolest in February, when lows fall to about 16°F (-9°C). The wettest month is typically May and the driest is July; the year sees roughly 18 in (446 mm) of precipitation.

• Best time to visitJune – September — comfort peaks in July (8.6/10)
• Warmest monthJuly — average high 88°F (31°C)
• Coolest monthFebruary — average low 16°F (-9°C)
• Wettest monthMay (2.6 in (67 mm))
• Driest monthJuly (0.8 in (21 mm))
• Annual precipitation18 in (446 mm)
• Based on2016-2025 daily ERA5 reanalysis data (10-year normals)
• Records fromGreat Falls 16st, 2 km away (1892-2026)