A man in the bucket of a chery-picker cuts down branches using a chainsaw at the end of a long pole.
A man is working in the sun.
Working in a cherry picker does not imply that the sun is shining.
We have no idea if he is working in the sun, it could be a cloudy day or night time.
The weather could be cloudy blocking the sun. This would be a condition in which the man is outside yet not working in the sun.