Rain drops do not accelerate for long terminal speed due to the vicious drag of the air.if this did not happen rain drop would hit us with a dangerous high speed.discuss
Yes, the air drag on the rain drop equals the gravitational force at fairly low speed.
The important thing is:
Force down = constant*volume
Force up = constant * area
so force down/force up = constant* L^3/L^2 = constant times length measurement for bodies of similar geometry and same density
THEREFORE
A little raindrop falls a lot more slowly than a raindrop the size of a person would !