sultriness

noun sultriness

• calefaction — the act of heating
• clamminess — covered with a cold, sticky moisture; cold and damp: clammy hands.
• dampness — Dampness is moisture in the air, or on the surface of something.
• dankness — unpleasantly moist or humid; damp and, often, chilly: a dank cellar.
• greenhouse effect — an atmospheric heating phenomenon, caused by short-wave solar radiation being readily transmitted inward through the earth's atmosphere but longer-wavelength heat radiation less readily transmitted outward, owing to its absorption by atmospheric carbon dioxide, water vapor, methane, and other gases; thus, the rising level of carbon dioxide is viewed with concern.