Answer:
It is drizzling so the main article you need is:
*<em>Paraguas</em> (umbrella).
Also you can complete your outfit wearing:
*<em>Suéter</em> (sweater)
*<em>Chaqueta</em> (jacket)
*<em>Camiseta</em> (shirt)
*<em>Pantalón</em> (pants)
Explanation:
When it is raining you need to protect youself and avoid to get wet. So you have to protect your body using a jacket or sweater over your shirt. It is better if the jacket or sweater is waterproof. Also it is needed long pants and a pair of boots (it could be plastic boots ---botas plásticas---). Finally, the main outfit requieres for a soft rain (like a <em>llovizna</em> is) is the umbrella.