恶劣天气：指不好的天气，包括阴雨天、暴风雨等。
weather unsuitable for outdoor activities
同义词： inclemency / inclementness
坏天气
《坏天气》（Bad Weather）是马丁帕尔的第一本摄影书，1982年出版。对于这位摄影书的高产者，这个“第一本”自然有具程碑价值，在摄影书收藏市场上很受关注...
固然天公不作美(Bad weather)，气候时雨时晒，不过照旧挡不住市民观赛(Spectators)的热心，不少市民更是早早赶赴最好观望点中大北门广场及星海音乐厅对开堤岸...
bad weather （糟糕的天气）是不可数名词，所以选 A。此题还可表示为 How bad the weather is!
... bad connection 接触不良 bad weather 天气恶劣 bad-weather condition 不良气象条件 ...
The bad weather ruined our trip.
天气恶劣，破坏了我们的旅行。
Our camping trip was spoilt by bad weather.
天气不好，破坏了我们的露营旅行。
The climbers were overtaken by bad weather.
登山者突然遭遇了恶劣天气。
Economists blamed the crisis on different causes, including high energy costs, bad weather and the use of food-crop lands for biofuel production.
VOA : special.2010.03.23
When bad weather prevented navigators from seeing the sun,moon or stars, they had to use a method called "dead reckoning" to find the ship's position.
VOA : special.2009.12.23
and the campus is so nice and the weather is beautiful, so it wasn't that bad.
校园很漂亮，天气也很好，所以都挺不错的。
SpeakingMax英语口语达人 : 关于学校生活
Bad weather has interfered with efforts to send out boats to clean up the oil and watch for the effects on wildlife in the Gulf of Mexico.
VOA : special.2010.05.04
"Bees are reasonably well equipped to handle bad weather at the appropriate times, " says Norton Miller.
Previous efforts to begin the 16-day mission had been hampered by bad weather and fuel leaks.
It weighs about as much as a car, making it vulnerable to bad weather.