Is it normal for joints especially knees to feel weak a day after cold w101.1 fever, aches, cough, sneezing. Clear runny nose. Still have sinus congestion?

Most definitely. Very common symptoms of a flu. If the symptoms of joint pains persist past the cold, then would talk to your doc. May also be good to run labs to make sure it is indeed a cold, as sometimes these symptoms are also due to other conditions that affect the immune system.