During which month is the sun at its lowest position?

The sun is at its lowest position in December due to the winter solstice, which occurs around December 21st in the Northern Hemisphere. This event marks the shortest day of the year, when the sun travels the shortest path across the sky, resulting in the lowest elevation at noon. As a consequence, December is characterized by the least amount of daylight and the sun's lowest position in the sky.

In contrast, October and November experience gradually decreasing daylight as the seasons transition from fall to winter, but they do not reach the lowest solar position until December. January, while still winter, shows a gradual increase in daylight following the solstice, meaning the sun begins to move higher in the sky compared to December. Thus, December is the month when the sun's position reaches its nadir for the year.