Cities With the Longest Days Today
Norilsk has the longest day of any major city right now, with 24h 00m of daylight today.
Why Do These Cities Have the Longest Days?
Day length depends almost entirely on latitude and the time of year. As Earth orbits the Sun, the hemisphere tilted toward it receives longer days, which is why the cities at the top of this list cluster near one pole during that hemisphere's summer. The figures here are recalculated every day from each city's latitude and the Sun's current declination, so the ranking shifts gradually through the year and flips between hemispheres at the solstices.
Near the equator, day length barely changes and stays close to 12 hours all year. The further a city sits from the equator, the more dramatic the swing between its longest and shortest days. At high enough latitudes the effect becomes extreme: the Sun never sets at midsummer or never rises at midwinter. Today Norilsk tops the list with 24h 00m of daylight.