As anyone who has ever stepped outside on a hot summer day knows, the air can take some time to heat up. The same is true for the atmosphere as a whole. Though the summer solstice marks the longest day of the year, it is not necessarily the hottest. That’s because it takes time for the atmosphere to absorb the Sun’s energy and convert it into heat. Similarly, midday is not necessarily the hottest time of day. That’s because it takes some time for the Sun’s rays to travel through the atmosphere and reach the ground. The same principle applies to the summer solstice: it can take some time for the atmosphere to heat up, even though the Sun is at its highest point in the sky. Today we are going to talk about why it stays hotter longer into the summer or the “Lag of Season”.