Boyes Hot Springs

What is the climate like in Boyes Hot Springs?

The best time to visit Boyes Hot Springs is typically May – October, with trip comfort peaking in June (9.3/10). Boyes Hot Springs is warmest in August, when daily highs average 81°F (27°C), and coolest in December, when lows fall to about 43°F (6°C). The wettest month is typically January and the driest is July; the year sees roughly 25 in (635 mm) of precipitation.

• Best time to visitMay – October — comfort peaks in June (9.3/10)
• Warmest monthAugust — average high 81°F (27°C)
• Coolest monthDecember — average low 43°F (6°C)
• Wettest monthJanuary (5.5 in (140 mm))
• Driest monthJuly (0.0 in (0 mm))
• Annual precipitation25 in (635 mm)
• Based on2016-2025 daily ERA5 reanalysis data (10-year normals)
• Records fromSonoma, 2 km away (1893-2026)