Cold nights, warm afternoons on the Truckee River.

Upper teens in Truckee at night, 40's in the afternoons.

Lets look at that.. When it's really cold at night, that's really going to lower the water temps. That will put the fish in the very slow water, frog water as we like to say. You will have to poke them in the nose with your flies. I would not start early, rather later in the day. Look for water that's about 3-5 feet deep. Slow walking pace water. If and when it warms up during the day, you can fish rifles and tops of runs, as the water will warm and fish will move up looking for food. 

In Reno it's a bit warmer and you will find more active fish, usually. Key word is usually. 

Out East on the lower Truckee River, East of Reno, it will be much warmer than any other section. 

Lets look at that..This is where you will have your best consistent Winter angling opportunities. Why? Well, it's warmer. Look for some of the best dry fly fishing on the entire river to happen down there shortly. Probably about the the next 10 days. That, and the streamer fishing is what really floats my boat. 

That's the report for the weather we're having right now. If we get big wet storms that can change everything. The Truckee River fishes like a steelhead river. You get the rain, you get the fish. End of January for that?