mugginessn.
/ˈmʌɡɪnᵻs/, U.S. /ˈməɡinᵻs/ The state, quality, or condition of being muggy; (esp. of weather) humidity.
ΘΚΠ
the world > the earth > weather and the atmosphere > weather > bad weather > [noun] > oppressive stillness or closeness
languor1742
closeness1780
mugginess1829
sagginess1946
1829 T. Morton Invincibles ii. i. 35 Our Invincibles seem to be rather overcome. May be its the mugginess of the weather.
1854 Amer. Farmer's New & Universal Handbk. 488 The particular season when the moistness or mugginess is, on the average of years, most prevalent.
1872 ‘G. Eliot’ in J. W. Cross George Eliot's Life III. 171 We are languishing with headache from two days' damp and mugginess.
1933 A. W. Barton Text Bk. Heat vii. 151 It is not the absolute pressure of the water vapour present in the atmosphere which determines its ‘mugginess’ or humidity, to use the technical term, but its relation to the saturation vapour pressure at the actual temperature of the air at the time.
1990 B. Swain Roses (BNC) 91 The conditions that most favour and encourage [powdery rose mildew] are not damp and mugginess, but hot dry days interspersed with clear, cold, dew-laden nights.
This entry has been updated (OED Third Edition, March 2003; most recently modified version published online March 2022).
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n.1829