When Is The Spring Season In Usa |link| Review

Data from the USA National Phenology Network (USA-NPN) and NOAA shows that spring is arriving earlier across most of the United States.

| 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

In the United States, the official start of spring is determined by the (also called the Vernal Equinox). This is when the sun shines directly on the equator, and the length of day and night are nearly equal. Data from the USA National Phenology Network (USA-NPN)