Why does the air get cold when it rains?

Rain is formed by condensation of water vapor at high altitude, and the temperature is relatively low. After falling, it will absorb the surrounding heat, and then the air after rain will slowly dissipate heat and cool down. Then we can feel the loss of heat and have a cool feeling.

Also, because the rainy day is cloudy, the sun is blocked by dark clouds, the sunlight is also weakened, the infrared rays in the sunlight are also weakened, and the time for the relative air to recover the temperature is also prolonged.

I hope my answer will satisfy you.