sunshininess

sunshiny +‎ -ness

sunshininess (uncountable)

1. The state, quality, or characteristic of being sunshiny.
   • 1888, August 2. Piromis Hulsey Bell. "Letter from Piromis H Bell to Thomas Alva Edison", Thomas A. Edison Papers, School of Arts and Sciences, Rutgers University:

     Having great confidence in your valuable opinion on practical scientific subjects, I would very greatly appreciate your volunteer opinon as to the value of a machine I have thought of ... to wit: The recording of the revolutions of a Crooke's Radiometer by an electrical recorder, the selective motion, or number of revolutions to indicate the comparative sunshininess or cloudiness of the days.

   • 2023, April 13. Helen Shaw. "Soap Operas as Guiding Light: Experimental theatre and soap tropes commune in Julia Izumi’s 'Regretfully, So the Birds Are' and Michael R. Jackson’s 'White Girl in Danger'", The New Yorker magazine:

     Accordingly, the director, Jenny Koons, has encouraged a tinny sunshininess from the actors, though there are moments, particularly if Frazier and Tyo let their smiles droop, when we sense the play’s taproots reaching down for anger.