does ultraviolet rays come through clouds
Best Answer: Good question. On average clouds reflect 60% of incoming solar radiation which includes short wave UV. The thicker the cloud the greater the reflection, from 60 - 90%. For thin clouds the albedo, or relection is 30 - 50%, which explains why we can still receive UV on cloudy days. Source(s): I am a retired Air Force meteorlogist with a Ph.D. in atmospheric science and over 50 years of professional experience.