Clear or fine weather with little or no clouds; fair skies (similar to 'sunny' or 'clear').
今日は晴天なので洗濯物がよく乾く。
It's fine weather today, so the laundry will dry well.
運動会は晴天の下で行われた。
The sports day was held under clear skies.
晴天続きで畑の水やりを忘れないようにしている。
With continued fine weather, we make sure not to forget watering the fields.