Answer
Petaluma experiences a Mediterranean climate, characterized by warm, dry summers and mild, wet winters. This climate is influenced by the Pacific Ocean, which moderates temperatures and provides moisture during the winter months. The average temperature in Petaluma ranges from 45°F (7°C) in January to 70°F (21°C) in July. The average annual rainfall is about 25 inches (63 cm), most of which falls between November and April.