In the United States, the answer to the question “When is spring?” is deceptively simple. On the calendar, it is a fixed period: the vernal equinox, which falls between March 19 and March 21, marks the astronomical beginning of spring, lasting until the summer solstice in late June. Yet, to truly understand when spring arrives in the US, one must look beyond the calendar and into the country’s vast and varied geography. Spring in America is not a single, uniform event but a rolling wave of change that sweeps across the continent, arriving at different times for different regions.

The American West presents another variation entirely. In the high deserts of Utah and Colorado, spring is a season of dramatic swings: warm, sunny days can be followed by late-season snowstorms. The arrival of spring is measured less by temperature and more by the sudden greening of the sagebrush and the rapid snowmelt that swells the rivers. In the Pacific Northwest, spring is a slow, wet awakening. The calendar says March, but the drizzle and overcast skies can feel like an extension of winter until well into May, when the region finally explodes with a lush, green vibrancy.

Perhaps the most famous marker of spring in the US is not a date but an event: the Cherry Blossom Festival in Washington, DC. The blooming of the gifted Japanese cherry trees is a delicate dance with nature, usually peaking in late March or early April. This phenomenon perfectly illustrates the American spring: predictable in its occurrence but variable in its timing from year to year, dependent on the whims of winter’s end.

Astronomically, spring offers a moment of perfect balance—a day when light and darkness are nearly equal. For millions of Americans, this calendar date provides a psychological turning point, a reason to shed the gloom of winter. However, the reality on the ground rarely matches the symmetry of the equinox. In the Deep South, spring often arrives early, sometimes as soon as late February. Azaleas burst into bloom in Georgia and the Gulf Coast states while much of the North is still buried under snow. By mid-March, when the calendar declares spring, cities like Atlanta and Dallas can already feel the first hints of summer’s humidity.