Petaluma

What is the climate like in Petaluma?

The best time to visit Petaluma is typically May – October, with trip comfort peaking in June (9.2/10). Petaluma is warmest in August, when daily highs average 77°F (25°C), and coolest in December, when lows fall to about 42°F (6°C). The wettest month is typically January and the driest is July; the year sees roughly 28 in (719 mm) of precipitation.

• Best time to visitMay – October — comfort peaks in June (9.2/10)
• Warmest monthAugust — average high 77°F (25°C)
• Coolest monthDecember — average low 42°F (6°C)
• Wettest monthJanuary (6.0 in (151 mm))
• Driest monthJuly (0.0 in (1 mm))
• Annual precipitation28 in (719 mm)
• Based on2016-2025 daily ERA5 reanalysis data (10-year normals)
• Records fromPetaluma AP, 4 km away (1893-2026)