The maximum solar altitude at the North Pole on the summer solstice is about 23.5°.
At the North Pole, the Sun does not rise high overhead during the Northern Hemisphere’s summer. Instead, it circles the horizon once each day, gradually climbing from near the horizon after the March equinox until reaching its highest elevation at the June solstice. That maximum is approximately 23.44°, conventionally rounded to 23.5°.
The value comes from Earth’s axial tilt. At the June solstice, the North Pole is tilted toward the Sun by about 23.44°, so the Sun’s elevation above the horizon at the pole matches that angle. At the South Pole, the Sun is simultaneously below the horizon during its polar winter.
The North Pole experiences continuous daylight for roughly six months, but the Sun’s altitude remains low. The Sun reaches 66.5° at the June solstice near the Arctic Circle’s latitude only under different viewing geometry—not at the North Pole.