Is the troposphere at a higher altitude during the summer or winter?

The troposphere, the lowest layer of Earth's atmosphere where most weather phenomena occur, varies in altitude depending on season and geographic location. During summer, the troposphere tends to be higher due to warmer surface temperatures causing air to expand. Warm air is lighter and less dense than cold air, which results in the troposphere extending further upwards as the air rises.

In contrast, during winter, cooler temperatures cause the air to contract, meaning the troposphere compresses and is generally at a lower altitude. This phenomenon is consistent across various regions, making summer the season when the troposphere reaches its maximum height. Hence, the understanding of seasonal atmospheric changes clearly designates summer as the time when the troposphere is higher.