晴天的英文：
sunny

参考例句：

• Lovely day
  可爱的晴天
• It's sunny,but the air is frosty.
  虽然是晴天,但空气很冷.
• Weather is changing all the time in mountain areas, Now it's fine, and then it begins to rain.
  山区的天气真是变幻无常,刚才还是晴天,一会儿就下起了雨。
• fair weather
  好天气;晴天
• Unbroken fine weather
  连续不断的晴天
• A long progression of sunny days
  连续的晴天.