Shade benefit analysis

Hello everyone!
I am carrying out a shade benefit analysis based on Chris Mackey’s. The case study is located in Santiago de Chile. But It feels very strange that during some hours over the year the use of the shade benefits even during the months with no harmful radiation, for example during winter. It can be seen in the annual comfort profile above (with radiation) that from June to August (winter months in Chile) in the afternoon there are some cold hours. But when the radiation is removed, the number of hours decreased. Then, how do you explain this? does anybody know why?