Summit

What is the climate like in Summit?

The best time to visit Summit is typically August – June, with trip comfort peaking in May (9.0/10). Summit is warmest in June, when daily highs average 100°F (38°C), and coolest in January, when lows fall to about 40°F (5°C). The wettest month is typically July and the driest is May; the year sees roughly 9.5 in (242 mm) of precipitation.

• Best time to visitAugust – June — comfort peaks in May (9.0/10)
• Warmest monthJune — average high 100°F (38°C)
• Coolest monthJanuary — average low 40°F (5°C)
• Wettest monthJuly (1.8 in (45 mm))
• Driest monthMay (0.1 in (3 mm))
• Annual precipitation9.5 in (242 mm)
• Based on2016-2025 daily ERA5 reanalysis data (10-year normals)
• Records fromTucson Intl AP, 7 km away (1946-2026)