drizzly

From drizzle +‎ -y.

drizzly (comparative drizzlier, superlative drizzliest)

1. Abounding with drizzle; drizzling.
   • 1960 March, “The January blizzard in the North-East of Scotland”, in Trains Illustrated, page 139:

     Thursday, January 21, was a miserable, wet, drizzly day; the thaw started fairly rapidly and transport began to move again.

   • 2014 January 30, Seth Kugel, “Wintertime Bargains in Budapest”, in The New York Times‎:

     On a drizzly mid-January evening, I stood at the arches of the wall of Buda Castle, overlooking the Danube and the 19th-century Chain Bridge that links Buda with Pest.