Why 60 degrees in fall feels different than in the spring

Picking out what to wear during the fall or spring can be tough. It might be sweater weather in the morning, only to feel more like summer heat by lunchtime. Or temperatures may start out in winter’s biting chill and suddenly warm up. It can be difficult to see 60 or 65 degrees Fahrenheit during a morning forecast and accurately anticipate what that will even feel like. There is actually a meteorological and a biological reason why the same temperature can feel different depending on the season.