Meteorological versus astronomical winter, what’s the difference?

KNOXVILLE (WATE) – Most people are familiar with astronomical-based seasons. They are defined by the rotation of the earth around the sun and the tilt of the earth’s axis.

The first astronomical day of winter is December 22, also referred to as the winter solstice. However, the first meteorological day of winter started December 1.

Related: Matt Hinkin’s winter weather forecast

While astronomical seasons are based on the angle of the sun, meteorological seasons are based on temperature. Meteorological winter is defined as the three coldest months throughout the winter, or December 1st through March 1st.

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