The Collaborative International Dictionary of English v.0.48:

Wintry \Win"try\, a. [AS. wintrig.]
   Suitable to winter; resembling winter, or what belongs to
   winter; brumal; hyemal; cold; stormy; wintery.
   [1913 Webster]

         Touch our chilled hearts with vernal smile,
         Our wintry course do thou beguile.       --Keble.
   [1913 Webster]

WordNet (r) 3.0 (2006):

wintry
    adj 1: characteristic of or occurring in winter; "suffered
           severe wintry weather"; "brown wintry grasses" [syn:
           wintry, wintery] [ant: autumnal, summery,
           vernal]
    2: devoid of warmth and cordiality; expressive of unfriendliness
       or disdain; "a frigid greeting"; "got a frosty reception"; "a
       frozen look on their faces"; "a glacial handshake"; "icy
       stare"; "wintry smile" [syn: frigid, frosty, frozen,
       glacial, icy, wintry]

Moby Thesaurus II by Grady Ward, 1.0:

69 Moby Thesaurus words for "wintry":
   Siberian, aestival, algid, arctic, autumn, autumnal, below zero,
   biting, bitter, bitterly cold, bleak, boreal, brisk, brumal,
   canicular, cold, cold as charity, cold as death, cold as ice,
   cold as marble, crisp, cutting, equinoctial, freezing,
   freezing cold, frigid, gelid, glacial, hibernal, hiemal,
   hyperborean, ice-cold, ice-encrusted, icelike, icy, inclement,
   keen, midsummer, midwinter, nipping, nippy, numbing, out of season,
   penetrating, piercing, pinching, raw, rigorous, seasonal, severe,
   sharp, sleety, slushy, snappy, solstitial, spring, springlike,
   stone-cold, subzero, summer, summerlike, summerly, summery,
   supercooled, vernal, winter, winterbound, winterlike, wintery