: March 1 – May 31. Meteorologists use whole months to make data comparison easier and to align with annual temperature cycles.
Spring onset varies significantly across the U.S. due to geography and climate: Meteorological Versus Astronomical Seasons | News
Known for dramatic swings. A March day can start at 20°F and reach 65°F by afternoon. Tornado season peaks in late spring (April–June) as warm, moist air from the Gulf clashes with cold Canadian air.
For example:
In southern states, such as Florida, Texas, and Arizona, spring-like weather may begin as early as February, with flowers blooming well before the official March start date. Conversely, in northern states and high-altitude regions—such as Minnesota, Montana, or the Rocky Mountains—winter conditions, including snowfall, often persist well into March and April.
However, if you follow the , spring begins with the vernal equinox (usually March 19–21) and ends with the summer solstice (around June 20–21). This means astronomical spring covers parts of March, all of April and May, and most of June.
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