When Is The Spring Season In Usa [updated] Official

Understanding these distinctions is crucial for travel planning, agriculture, horticulture, allergy management, and interpreting climate data. Report prepared: April 2026 Data sources: NOAA National Centers for Environmental Information, USA National Phenology Network, USDA Plant Hardiness Zone Map, National Weather Service.

| Event | Typical Timing (Lower 48) | Southern extremes | Northern extremes | |-------|---------------------------|-------------------|-------------------| | First leaf out (deciduous trees) | March – April | February (FL, TX) | May (MN, ME) | | First bloom (early flowers – crocus, daffodil) | February – March | January (FL, CA) | April (ND, VT) | | Last spring frost | Varies dramatically | Late Feb (FL) | Late May – early June (New England, Midwest) | | Bird migration (first robin, red-winged blackbird) | February – March | January (Gulf Coast) | April (Alaska, Northern border) | when is the spring season in usa