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Scott G Winterton, Deseret News
Madison Sessions and her dog, Sugar, play in Murray on Monday, March 20, 2017, the first day of spring.

Madison Sessions and her dog, Sugar, enjoy the unseasonably warm weather during an outing in Murray on Monday, which was also the first day of spring. The spring (vernal) equinox marks the moment the sun cross the celestial equator — the imaginary line in the sky about the Earth's equator — from south to north. This happens on March 19, 20 or 21 every year. The equinox is used mark the change of seasons, as the balance of light shifts to make for longer days and warmer weather. According to KSL meteorologist Grant Weyman, residents along the Wasatch Front will see temperatures rise to 75 degrees Tuesday before things cool off on Wednesday and Thursday, when there will be a high probability of rain showers.