Page "North Pole" Paragraph 51

The sun at the North Pole is continuously above the horizon during the summer and continuously below the horizon during the winter.

Sunrise is just before the March equinox ( around March 19 ); the sun then takes three months to reach its highest point of near 23½ ° elevation at the summer solstice ( around June 21 ), after which time it begins to sink, reaching sunset just after the September equinox ( around September 24 ).

When the sun is visible in the polar sky, it appears to move in a horizontal circle above the horizon.

This circle gradually rises from near the horizon just after the vernal equinox to its maximum elevation ( in degrees ) above the horizon at summer solstice and then sinks back toward the horizon before sinking below it at the autumnal equinox.