The explosion of plant life means a massive release of pollen into the air. Spring weather—particularly windy, dry days—amplifies the spread of tree and grass pollen, triggering seasonal allergic rhinitis (hay fever) for millions of people worldwide. Spring Weather in the Era of Climate Change
Astronomical spring begins on the Vernal Equinox, occurring around March 19–21 in the Northern Hemisphere and September 21–24 in the Southern Hemisphere. On this day, the Earth’s axis is tilted neither toward nor away from the sun. This alignment results in nearly equal amounts of daylight and darkness worldwide. From this point forward, the hemisphere entering spring tilts progressively closer to the sun, leading to longer days and increased solar radiation. The Clash of Air Masses spring season weather
As weather warms, plants reproduce. Tree pollen (oak, birch, cedar) explodes in early spring, followed by grass pollen in late spring. The alternating dry winds and humid rain create a perfect storm for allergy sufferers—rain washes pollen away temporarily, but dry, breezy days send concentrations soaring. This is often called "spring asthma" or "hay fever season," affecting millions. The explosion of plant life means a massive
