Hot or warm and humid:
— Muggy weather.

synonyms: steamy, sticky.

Roget 426: opaque, impervious to light; adiaphanous^†; dim etc. 422; turbid, thick, muddy, opacous^†, obfuscated, fuliginous^†, cloud, hazy, misty, foggy, vaporous, nubiferous^†, muggy^† etc. (turbidity) 426.1. smoky, fumid^†, murky, dirty.    ... show more

Roget 422: dim, dull, lackluster, dingy, darkish, shorn of its beams, dark 421.    faint, shadowed forth; glassy; cloudy; misty etc. (opaque) 426; blear; muggy^†, fuliginous^†; nebulous, nebular; obnubilated^†, overcast, crepuscular, muddy, lurid, leaden, dun, dirty; looming etc. v.. pale etc. (colorless) 429; confused etc. (invisible) 447.    ... show more

Polish: parny