Why is it hot before raining? What causes the temperature hike before a rain?
I have heard explanations like one that says as the moisture rises, you sweat more.
Can somebody provide a more scientific explanation for this.  
 A: When warm humid air flows into cool air the humidity is condensed into rain as the warm air cools. The temperature rise your feeling is the warm humid air rolling into your cooler area before it rains. Your body cools itself by sweat evaporating which disperses your heat into the surrounding atmosphere. If the air is humid the sweat cannot evaporate and you retain heat and feel hot.
A: Rainfall has a cooling effect. However, it becomes hot and stuffy a short while before rainfall. This is because rainclouds gather in the sky. They are saturated with water and do not allow wind to blow.
A: The dust particles and the vapours which are present in the atmosphere are also brought down by rain and there is no natural filtration to stop ultra violet rays thus causing heat after rain especially in monsoon because of frequent showers. 
A: When a thunderstorm develops, the release of latent heat by condensation is 7.5 times as much as the release of latent heat by freezing.
https://www.theweatherprediction.com/habyhints/19/
Now it has to do with h2O bonds hydrogen or van der waals I can’t remember
