There are two ways Americans define spring, and they often overlap.
In the United States, the spring season is defined by two different timelines, but it primarily spans the months of . According to the National Oceanic and Atmospheric Administration (NOAA) , meteorological spring begins precisely on March 1 and ends on May 31 . Alternatively, astronomical spring tracks the Earth's orbit and stretches from the vernal equinox (around March 19–21) to the summer solstice (around June 20–22) . spring in america months