Dreariness
/ˈdrɪrinəs/
Definition 1 of 1
Pro Tip 1/3Emotional Weight
Dreariness carries an emotional heaviness, suggesting not just boredom, but also sadness. 
The film's ending left an aura of dreariness hanging over the audience.
Pro Tip 2/3Not Just Weather
Although often used to describe gloomy weather, dreariness can apply to situations, places, and feelings. 
He felt a sense of dreariness at the monotonous meeting.
Pro Tip 3/3Extended Boredom
Dreariness implies prolonged or intense boredom, making an experience seem endless. 
Her voice had a dreariness that made the lecture seem twice as long.