Have you ever stepped outside in the morning with a jacket or sweatshirt only to find yourself shedding layers as the day went on?

It’s not uncommon for temperatures to warm by 40 degrees from the morning lows, especially during the cooler months. This is because the air mass is a lot drier, and temperatures can warm and cool more efficiently in a dry air mass.

Watch the video above to see what causes these massive temperature swings in the fall.