San Tan Valley

What is the climate like in San Tan Valley?

The best time to visit San Tan Valley is typically February – June, with trip comfort peaking in May (8.9/10). San Tan Valley is warmest in July, when daily highs average 105°F (41°C), and coolest in January, when lows fall to about 43°F (6°C). The wettest month is typically January and the driest is May; the year sees roughly 11 in (275 mm) of precipitation.

• Best time to visitFebruary – June — comfort peaks in May (8.9/10)
• Warmest monthJuly — average high 105°F (41°C)
• Coolest monthJanuary — average low 43°F (6°C)
• Wettest monthJanuary (1.5 in (39 mm))
• Driest monthMay (0.1 in (2 mm))
• Annual precipitation11 in (275 mm)
• Based on2016-2025 daily ERA5 reanalysis data (10-year normals)
• Records fromCasa Grande Nm, 22 km away (1908-2026)