What are some reasons for cloudy urine?

Many benign options. If asymptomatic the most probable explanation is urinary phosphates. They come out of solution when the urine is alkaline and look "cloudy" then later, when the urine is acidic again, the phosphates will be in solution and when you void, you won't see them. Other causes are yeast, urine bacterial infection, or more serious causes usually associated with symptoms.
R/o infection ? Cloudy urine may not mean anything wrong but is better to see the rest of the urine test to rule out infection. The urine may contain protein, fat, crystals, blood, casts, white cells, giving the consistency of cloudy. Check your urine at rhe dr. Drink more fluids unless you have serious renal insufficiency or congestive heart disease.