陰晴[insei] unsettled (fine and cloudy) weather
快晴[kaisei] clear weather
気晴し[kibarashi] recreation
見晴し[miharashi] view
見晴す[miharasu] to command a view

五月晴[satsukibare] early-summer fine weather (during rainy season)
晴らす[harasu] to dispel
晴れる[hareru] to clear up
晴間[harema] break (in the weather, esp. rain or snow)