Ione

What is the climate like in Ione?

The best time to visit Ione is typically May – October, with trip comfort peaking in July (9.5/10). Ione is warmest in July, when daily highs average 93°F (34°C), and coolest in December, when lows fall to about 42°F (5°C). The wettest month is typically January and the driest is July; the year sees roughly 31 in (776 mm) of precipitation.

• Best time to visitMay – October — comfort peaks in July (9.5/10)
• Warmest monthJuly — average high 93°F (34°C)
• Coolest monthDecember — average low 42°F (5°C)
• Wettest monthJanuary (6.0 in (153 mm))
• Driest monthJuly (0.0 in (0 mm))
• Annual precipitation31 in (776 mm)
• Based on2016-2025 daily ERA5 reanalysis data (10-year normals)
• Records fromSutter Hill Cdf, 12 km away (1968-2026)