Helena

What is the climate like in Helena?

The best time to visit Helena is typically July – September, with trip comfort peaking in July (8.3/10). Helena is warmest in July, when daily highs average 82°F (28°C), and coolest in February, when lows fall to about 12°F (-11°C). The wettest month is typically May and the driest is January; the year sees roughly 23 in (582 mm) of precipitation.

• Best time to visitJuly – September — comfort peaks in July (8.3/10)
• Warmest monthJuly — average high 82°F (28°C)
• Coolest monthFebruary — average low 12°F (-11°C)
• Wettest monthMay (3.5 in (88 mm))
• Driest monthJanuary (1.1 in (28 mm))
• Annual precipitation23 in (582 mm)
• Based on2016-2025 daily ERA5 reanalysis data (10-year normals)
• Records fromHelena AP Asos, 4 km away (1938-2026)