There's a major difference between daylight and getting baked under direct solar irradiation.
If the UV doesn't kill the virus the heat will. But even then, it's not immediate. If droplets containing viruses successfully land in your respiratory system (which is constantly sucking air), it doesn't matter how much sun there is outside, the virus is now cozy.
A beach could be perfect, except that there may be strong winds. You should hope they are not blowing droplets from your neighbor into you.
Similarly, if it's an overcast day, it doesn't really matter much.
Strong winds seem likely to be a good thing to me. Any exhalations from my neighbor are going to be quite dilute by the time they get to me in the wind.
If the UV doesn't kill the virus the heat will. But even then, it's not immediate. If droplets containing viruses successfully land in your respiratory system (which is constantly sucking air), it doesn't matter how much sun there is outside, the virus is now cozy.
A beach could be perfect, except that there may be strong winds. You should hope they are not blowing droplets from your neighbor into you.
Similarly, if it's an overcast day, it doesn't really matter much.