陽気, ようき
NA-adjective, Antonym: 陰気・1
1. cheerful, jovial, merry, lively
2. weather, season
See 陰気・いんき・2
3. spirit of yang
今日は汗ばむような陽気だ。
は
Particle, pronounced わ in modern Japanese
1. indicates sentence topic
2. indicates contrast with another option (stated or unstated)
3. adds emphasis