From the gentle patter on a window to the crash of a thunderstorm, rain does more than water the earth—it changes the way we think, feel, and connect. In this clear, surprising guide, science writer River Calloway explores why a rainy day can soothe us into calm, spark creativity, or stir a quiet sadness. Drawing on research from psychology, neuroscience, and the senses, you'll discover how the scent of petrichor, the rhythm of falling drops, and the dimming of light influence your brain chemistry and mood. You'll learn why some people feel happier in the rain, how rainy weather affects work and social life, and what the science says about seasonal affective disorder and hygge. Blending cultural history with practical wellbeing strategies, The Psychology of Rain and Mood offers a fresh lens on a universal experience. Whether you find rain refreshing or draining, this book will help you understand—and embrace—its hidden influence on your daily life. Part of The Curious Rain Library.