March, like June, September and December, is a month of two seasons. From a meteorologic (i.e. human) perspective, spring begins on March first while the astronomic (i.e. natural) spring begins on or about March 21 (the spring equinox).
While our distant ancestors paid far more attention to the equinoxes and solstices that mark the beginning of nature's seasons, modern humans have settled on twelve months of variable length that divide our unnatural year.
For that reason, most of March is often more winter-like across central and northern latitudes of the Northern Hemisphere. This is especially true at higher elevations; here along the Colorado Front Range, March is the snowiest month of the year even as the first wildflowers add welcome color to the drab winter landscape. Then again, climate change may eventually abolish our concept of seasons altogether.
