At what time of day does the sun reach its highest point on the summer solstice? Solar noon.
Solar noon is the instant when the Sun crosses the local celestial meridian, an imaginary north–south arc passing through the observer’s sky. At that moment, the Sun reaches its highest apparent position for the day and casts the shortest shadow. The answer refers to the Sun’s position, not necessarily the clock reading of 12:00.
On the Northern Hemisphere summer solstice, the Sun is directly overhead at the Tropic of Cancer, near 23.5° north latitude. Elsewhere, its maximum altitude depends on latitude. In the Southern Hemisphere, the Sun is still highest at solar noon, but it generally appears toward the north rather than the south.
A frequent misconception is that solar noon always occurs at noon by the clock. Time zones, daylight-saving time, longitude, and the equation of time can shift it substantially. Sunrise and sunset mark when the Sun crosses the horizon, while midnight is the approximate opposite point in the daily cycle—not the time of maximum altitude.