The only actual fishing that I know of last week was some younger guys I know from the shop were Bull Trout fishing on the Metolius. And I know they caught some nice bull trout despite the freezing weather. For the rest of you sane friends, I agree that I wouldn’t have ventured out either.
With the forecast showing days in the upper 30’s and 40’s and no fog that I see I know desires will change to get a few casts in, and why not head to the river from 11 to 3 and stretch your legs, breath fresh air and see nature. Bring your nymph rod and fish a Tan Caddis Pupa and Blue Perdigon combo. You can keep it that simple, or add some Eggs, Golden Stones, Green Drake Nymphs like a Tungsten Jig 20 Incher, Jig Napoleon in Brown and Olive Perdigon with a Fluorescent Orange Hot Spot, A Purple Perdigon, Olive Micro May and certainly pupa for the October Caddis and Silver Stripe Sedge which are #8 and #12-14 respectively. Add some Jig Streamers like a Slum Lord or Soccer Mom to the box and be prepared for the Blue Wing Olive Hatch with a #18 emerger, cripple and dun (Film Critic, Sparkle Dun, KD Dun and Comparadun or Parachute).
Certainly Bull Trout fishing is a good bet in January and fishing a large articulated streamer is one tactic, also jig streamers with an indicator or on a tightline rig. Hedging the bet a little on success, get out early for the Bull Trout to give yourself a bit of an advantage.