I don’t think it’s the sun itself, but it’s the extreme temperatures and high humidity that people don’t like (myself included).
If it was ‘normal’ temperatures, such as the low 20’s, you wouldn’t get half the amount of complaints
It has however been particularly wet over the past 24 hours, especially in areas where the rain hasn’t stopped at all, such as here. Good for the vegetation and keeping any droughts from being a problem however!