The name used by the Dúnedain, taken from the Sindarin language, for the sixth of the year's twelve months. It fell between the fifth and seventh months, Lothron and Cerveth. The name 'Nórui' is related to the QuenyaNárië, used in most related calendars of Middle-earth. Both names seem to the refer to the Sun, as this month marked the coming of summer.
The Sindarinnór- element (equivalent to Quenyanár-) literally means 'fire' or 'flame', but with an explicit connection to the Sun (which was known as Anor in Sindarin, or Anar in Quenya). So Nórui was the month of the heat of the Sun or, perhaps more naturally, the 'month of sunshine'.