at what temperature can you see your breath
If the dew point, and hence humidity is too low on a cold day, the moisture in your breath will just evaporate before the cloud can form. There's no exact temperature at which you can say 'if it's this cold, you will always be able to see your breath'. Generally, the accepted threshold is 45 degrees Fahrenheit, but, under perfect conditions, you could possible see your breath when temps are int he 50s or even low 60s.