Wordnet 3.0
ADJECTIVE (1)
1. 
 (of weather) wet by periods of rain; 
- Example: "showery weather"- Example: "rainy days"[syn: showery, rainy]
The Collaborative International Dictionary of English v.0.48:
Showery \Show"er*y\, a.
   1. Raining in showers; abounding with frequent showers of
      rain.
      [1913 Webster]
   2. Of or pertaining to a shower or showers. "Colors of the
      showery arch." --Milton.
      [1913 Webster]
WordNet (r) 3.0 (2006):
showery
    adj 1: (of weather) wet by periods of rain; "showery weather";
           "rainy days" [syn: showery, rainy]